M45 – The Pleiades Cluster

M45 - The Pleiades Cluster

The Pleiades, also known as M45, the Seven Sisters or Subaru (Japan), is an open star cluster containing middle-aged stars located in the constellation of Taurus. It is among the nearest star clusters to Earth and is the cluster most obvious to the naked eye in the night sky.

The cluster is dominated by hot blue and extremely luminous stars that have formed within the last 100 million years. Dust that forms a faint reflection nebulosity around the brightest stars was thought at first to be left over from the formation of the cluster is now known to be an unrelated dust cloud in the interstellar medium, through which the stars are currently passing. Computer simulations have shown that the Pleiades was probably formed from a compact configuration that resembled the Orion Nebula. Astronomers estimate that the cluster will survive for about another 250 million years, after which it will disperse due to gravitational interactions with its galactic neighborhood.

[Info from Wikipedia]

ZWO ASI1600MC-Pro with Baader IR/UV cut filter
Explore Scientific ED80
Celestron AVX Mount, guided
105 minutes of integration time

Shot from the L&A County Dark Sky Viewing Area in Erinsville, Ontario

Posted by Dark Arts Astrophotography on 2018-08-11 20:24:48

Tagged: , astrophotography , astronomy , space , Sky , stars , star , science , m45 , Subaru , subarudarksky , Pleiades , Cluster , Messier

TEXAS RANCH ENTRANCE

TEXAS RANCH ENTRANCE

Photo taken by Linden Hudson in 2003 in the Texas Hill Country not far from La Grange Texas.

Who is Linden Hudson?

CLASSICBANDS DOT COM said: “According to former roadie David Blayney in his book SHARP DRESSED MEN: sound engineer Linden Hudson co-wrote much of the material on the ZZ Top ELIMINATOR album.” (end quote)

(ZZ Top never opted to give Linden credit, which would have been THE decent thing to do. It would have helped Linden’s career as well. The band and management worked ruthlessly to take FULL credit for the hugely successful album which Linden had spent a good deal of time working on. Linden works daily to tell this story. Also, the band did not opt to pay Linden, they worked to keep all the money and they treated Linden like dirt. It was abuse. Linden launched a limited lawsuit, brought about using his limited resources which brought limited results and took years. No one should treat the co-writer of their most successful album like this. It’s just deeply fucked up.)
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(see full story at Linden’s website: www.linden-hudson.com/birth-of-the-zz-top-eliminator-album )
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Hear the original ZZ Top ELIMINATOR writing/rehearsal tapes made by Linden Hudson and Billy Gibbons at: www.flickr.com/photos/152350852@N02/35711891332/in/photol…
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LICKLIBRARY DOT COM (2013 interview) ZZ TOP’S BILLY GIBBONS SAID: “the Eliminator sessions in 1983 were guided largely by another one of our associates, Linden Hudson, a gifted engineer, during the development of those compositions.” (end quote) (Gibbons admits this after 30 years, but offers Linden no apology or reparations for lack of credit/royalties)
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MUSICRADAR DOT COM (2013 interview with ZZ Top’s guitarist Billy Gibbons broke 30 years of silence about Linden Hudson introducing synthesizers into ZZ Top’s sound.) Gibbons said: “This was a really interesting turning point. We had befriended somebody who would become an influential associate, a guy named Linden Hudson. He was a gifted songwriter and had production skills that were leading the pack at times. He brought some elements to the forefront that helped reshape what ZZ Top were doing, starting in the studio and eventually to the live stage. Linden had no fear and was eager to experiment in ways that would frighten most bands. But we followed suit, and the synthesizers started to show up on record.” (once again, there was no apology from ZZ Top or Billy Gibbons after this revelation).
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TEXAS MONTHLY MAGAZINE (Dec 1996, By Joe Nick Patoski): "Linden Hudson floated the notion that the ideal dance music had 124 beats per minute; then he and Gibbons conceived, wrote, and recorded what amounted to a rough draft of an album before the band had set foot inside Ardent Studios."
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FROM THE BOOK: SHARP DRESSED MEN – ZZ TOP (By David Blayney) : "Probably the most dramatic development in ZZ Top recording approaches came about as Eliminator was constructed. What had gone on before evolutionary; this change was revolutionary. ZZ Top got what amounted to a new bandsman (Linden) for the album, unknown to the world at large and at first even to Dusty and Frank."
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CNET DOT COM: (question posed to ZZ Top): Sound engineer Linden Hudson was described as a high-tech music teacher on your highly successful "Eliminator" album. How much did the band experiment with electronic instruments prior to that album?
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THE HOUSTON CHRONICLE, MARCH 2018: "Eliminator" had a tremendous impact on us and the people who listen to us," says ZZ Top’s bass player. Common band lore points to production engineer Linden Hudson suggesting that 120 beats per minute was the perfect rock tempo, or "the people’s tempo" as it came to be known.
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FROM THE BOOK: SHARP DRESSED MEN – ZZ TOP by David Blayney: (page 227): "…the song LEGS Linden Hudson introduced the pumping synthesizer effect."
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(Search Linden Hudson in the various ZZ Top Wikipedia pages which are related to the ELIMINATOR album and you will find bits about Linden. Also the main ZZ Top Wikipedia page mentions Linden. He’s mentioned in at least 7 ZZ Top related Wikipedia pages.)
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FROM THE BOOK: SHARP DRESSED MEN – ZZ TOP By David Blayney: "Linden found himself in the position of being Billy’s (Billy Gibbons, ZZ Top guitarist) closest collaborator on Eliminator. In fact, he wound up spending more time on the album than anybody except Billy. While the two of them spent day after day in the studio, they were mostly alone with the equipment and the ideas."
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FROM THE BOOK: BEER DRINKERS & HELL RAISERS: A ZZ TOP GUIDE (By Neil Daniels, released 2014): "Hudson reportedly had a significant role to play during the planning stages of the release (ELIMINATOR)."
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FROM THE BOOK: ZZ TOP – BAD AND WORLDWIDE (ROLLING STONE PRESS, WRITTEN BY DEBORAH FROST): "Linden was always doing computer studies. It was something that fascinated him, like studio technology. He thought he might understand the components of popular songs better if he fed certain data into his computer. It might help him understand what hits (song releases) of any given period share. He first found out about speed; all the songs he studied deviated no more than one beat from 120 beats per minute. Billy immediately started to write some songs with 120 beats per minute. Linden helped out with a couple, like UNDER PRESSURE and SHARP DRESSED MAN. Someone had to help Billy out. Dusty and Frank didn’t even like to rehearse much. Their studio absence wasn’t really a problem though. The bass and drum parts were easily played with a synthesizer or Linn drum machine." (end quote)
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FROM THE BOOK: "SHARP DRESSED MEN – ZZ TOP" BY DAVID BLAYNEY: "After his quantitative revelations, Linden informally but instantly became ZZ Top’s rehearsal hall theoretician, producer, and engineer." (end quote)
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FROM THE BOOK: "ZZ TOP – BAD AND WORLDWIDE" (ROLLING STONE PRESS, BY DEBORAH FROST): "With the release of their ninth album, ELIMINATOR, in 1983, these hairy, unlikely rock heroes had become a pop phenomenon. This had something to do with the discoveries of a young preproduction engineer (Linden Hudson) whose contributions, like those of many associated with the band over the years, were never acknowledged."
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FROM THE BOOK: ​SHARP DRESSED MEN – ZZ TOP (By DAVID BLAYNEY) : "The integral position Linden occupied in the process of building El​iminator was demonstrated eloquently in the case of song Under Pressure. Billy and Linden, the studio wizards, did the whole song all in one afternoon without either the bass player or drummer even knowing it had been written and recorded on a demo tape. Linden synthesized the bass and drums and helped write the lyrics; Billy did the guitars and vocals."
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FROM THE BOOK: "TRES HOMBRES – THE STORY OF ZZ TOP" BY DAVID SINCLAIR (Writer for the Times Of London): "Linden Hudson, the engineer/producer who lived at Beard’s house (ZZ’s drummer) had drawn their attention to the possibilities of the new recording technology and specifically to the charms of the straight drumming pattern, as used on a programmed drum machine. On ELIMINATOR ZZ Top unveiled a simple new musical combination that cracked open a vast worldwide market.
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FROM THE BOOK: "SHARP DRESS MEN – ZZ TOP" BY DAVID BLAYNEY: "ELIMINATOR went on to become a multi-platinum album, just as Linden had predicted when he and Billy were setting up the 124-beat tempos and arranging all the material. Rolling Stone eventually picked the album as number 39 out of the top 100 of the 80’s. Linden Hudson in a fair world shoud have had his name all over ELIMINATOR and gotten the just compensation he deserved. Instead he got ostracized."
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FROM THE BOOK: ​SHARP DRESSED MEN – ZZ TOP by DAVID BLAYNEY: "He (Linden) went back with the boys to 1970 when he was working as a radio disc jocky aliased Jack Smack. He was emcee for a show ZZ did around that time, and even sang an encore tune with the band, perhaps the only person ever to have that honor." (side note: this was ZZ Top’s very first show).
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FROM THE BOOK: "SHARP DRESSED MEN – ZZ TOP" BY DAVID BLAYNEY: "Linden remained at Frank’s (ZZ Top drummer) place as ZZ’s live-in engineer throughout the whole period of ELIMINATOR rehearsals, and was like one of the family… as he (Linden) worked at the controls day after day, watching the album (ELIMINATOR) take shape, his hopes for a big step forward in his production career undoubtably soared. ELIMINATOR marked the first time that ZZ Top was able to rehearse an entire album with the recording studio gadgetry that Billy so loved. With Linden Hudson around all the time, it also was the first time the band could write, rehearse, and record with someone who knew the men and the machines. ZZ Top was free to go musically crazy, but also musically crazy like a fox. Linden made that possible too."
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FROM THE BOOK "ZZ TOP – BAD AND WORLDWIDE" (ROLLING STONE PRESS, BY DEBORAH FROST, WRITER FOR ROLLING STONE MAGAZINE): "… SHARP DRESSED MAN which employed Hudson’s 120 beat-per-minute theory. The feel, the enthusiasm, the snappy beat and crisp clean sound propelled ELIMINATOR into the ears and hearts of 5 million people who previously could have cared less about the boogie band of RIO GRANDE MUD."
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ULTIMATECLASSICROCK DOT COM: "This new melding of styles was encouraged by Hudson, who served as a kind of pre-producer for ​EL LOCO … … Hudson helped construct ZZ Top drummer Frank Beard’s home studio, and had lived with him for a time. That led to these initial sessions, and then a closer collaboration on 1983’s ​ELIMINATOR.
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FIREDOGLAKE DOT COM: "I like Billy Gibbons’ guitar tone quite a lot, but I lost all respect for them after reading how badly they fucked over Linden Hudson (the guy who was the brains behind their move to include synthesizers and co-wrote most of their career-defining Eliminator record)."
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EMAIL FROM A ZZ TOP FAN TO LINDEN (One Of Many): "I write you today about broken hearts, one is mine and one is for you. I have been a ZZ Top fan since I was 6 years old. I purchased ELIMINATOR vinyl from Caldors in Connecticut with the $20 my grandma gave me for my birthday. I will spare the #1 fan epic saga of tee shirts, harassing Noreen at the fan club via phone weekly for years, over 40 shows attended. Posters, non stop conversation about the time I have spent idolizing this band, but more Billy G, as he has seemed to break free of the Lone Wolf shackles and it became more clear this was his baby. In baseball I was Don Mattingly’s #1 fan, Hershel Walker in football, Billy Gibbons in music. What do these individuals have in common? They were role models. Not a DUI, not a spousal abuse, not a drug overdose, not a cheater. Until I read your web page. I read Blayney’s book around 1992 or so, I was in middle school and I was familiar with your name for a long time. I didn’t realize you suffered so greatly or that your involvement was so significant. It pains me to learn my idol not only cheated but did something so wrong to another being. I now know this is where tall tales and fun loving bullshit and poor morals and ethics are distinguished and where I would no longer consider myself to look up to Billy. I love to joke and I love credit but I have always prided myself on ethics and principles… I hold them dear. I wanted to say, the snippet of UNDER PRESSURE you played sounded very new wave and I may like it more than the finished product. Well that’s all. You have reached ZZ Top’s biggest fan and I can let others know. Bummer. Cheers and good luck. James."​

Posted by lindenhud1 on 2017-12-11 02:30:11

Tagged: , texas ranch , entrance , sign , lone star , horns , god bless texas sign , sky , star , lone_star_state , ranch_gate , bull_horns , blue_sky , texas_sky , usa , america , god_bless_texas , ranch_entry , texas_gate , texas_star , star_of_texas , texas_star_above_gate , gate , entry , steer_horns , united_states , symbol , cow_horns

Resistance Ski Speeder (1)

Resistance Ski Speeder (1)

Took a break from speeder bike making so I could finally edit these pictures 😉

While I think the Ski Speeder’s design is a bit too close to real-world aircraft, I do like it quite a bit. It was certainly interesting to build in any case, I’ve never made a real-world aircraft before (or rather, anything so close to one) so it was strange to find myself building corsair-like wings and a tubular fuselage with a tail/rudder. I also wanted to explore some new-to-me Lego techniques to really push myself into unknown territory. This meant using stacks of technic liftarms for the wings which I was quite pleased with considering I usually avoid using technic in any significant way 🙂

I was planning on making a section of Crait’s surface and a build for the red dust but I soon realised I’d need to build quite a substantial amount to look right with the wide model. Instead I went for a stylised computer generated background which I almost prefer as it makes the model stand out a bit better.

A big thanks to majortom whose Ski speeder inspired quite a few bits and pieces of my own including: fence pieces on the engine section, technic wheel rim for the tail and of course the outline of his cockpit area which was the basis of my design. And thanks to my buddy Kit Bricksto who kindly gave his opinion on the model during its construction 🙂

Let me know what you think, feedback good or bad is appreciated as always 😀

Posted by Inthert on 2018-02-11 14:46:01

Tagged: , Lego , moc , star , wars , last , Jedi , Crait , resistance , ski , speeder , skimmer , ship , salt , wings , tail , rudder , blue , weapons , pod , cockpit , engine , airplane , sky , aircraft

M45- The Pleiades Cluster

M45- The Pleiades Cluster

The Pleiades, also known as M45, the Seven Sisters or Subaru (Japan), is an open star cluster containing middle-aged stars located in the constellation of Taurus. It is among the nearest star clusters to Earth and is the cluster most obvious to the naked eye in the night sky.

The cluster is dominated by hot blue and extremely luminous stars that have formed within the last 100 million years. Dust that forms a faint reflection nebulosity around the brightest stars was thought at first to be left over from the formation of the cluster is now known to be an unrelated dust cloud in the interstellar medium, through which the stars are currently passing. Computer simulations have shown that the Pleiades was probably formed from a compact configuration that resembled the Orion Nebula. Astronomers estimate that the cluster will survive for about another 250 million years, after which it will disperse due to gravitational interactions with its galactic neighborhood.

[Info from Wikipedia]

Nikon D7000
Explore Scientific ED80
Celestron AVX Mount
9 x 120 second exposures @ ISO 1600

Shot from the North Frontenac Township Dark Sky Preseve near Plevna, Ontario

Posted by Dark Arts Astrophotography on 2016-08-28 16:26:41

Tagged: , astrophotography , astronomy , space , stars , Sky , star , Cluster , Pleiades , Subaru , night , Nebula , nature , natur

Blue space nebula

Blue space nebula

Blue space nebula as abstract background

Posted by Renato Gurgel on 2011-01-10 01:27:19

Tagged: , blue , purple , magenta , nebula , star , space , night , astronomy , field , way , milky , bright , galaxy , fractal , backgrounds , sky , light , outer , glowing , dark , science , dust , infinity , awe , abstract , cluster , looking , forecasting , deep , glitter , rendering , black , computer , illustration , swirl , alien , ethereal , eternity , cosmos , astral , natural , fantasy

V1247 Orionis

V1247 Orionis

Edited European Southern Observatory image of the star V1247 Orionis, set in a ring of dust and gas.

Original caption: This image from the Atacama Large Millimeter/submillimeter Array (ALMA) shows V1247 Orionis, a young, hot star surrounded by a dynamic ring of gas and dust, known as a circumstellar disc. This disc can be seen here in two parts: a clearly defined central ring of matter and a more delicate crescent structure located further out.

The region between the ring and crescent, visible as a dark strip, is thought to be caused by a young planet carving its way through the disc. As the planet orbits around its parent star, its motion creates areas of high pressure on either side of its path, similar to how a ship creates bow waves as it cuts through water. These areas of high pressure could become protective barriers around sites of planet formation; dust particles are trapped within them for millions of years, allowing them the time and space to clump together and grow.

The exquisite resolution of ALMA allows astronomers to study the intricate structure of such a dust trapping vortex for the first time. The image reveals not only the crescent-shaped dust trap at the outer edge of the dark strip, but also regions of excess dust within the ring, possibly indicating a second dust trap that formed inside of the potential planet’s orbit. This confirms the predictions of earlier computer simulations.

Dust trapping is one potential solution to a major stumbling block in current theories of how planets form, which predicts that particles should drift into the central star and be destroyed before they have time to grow to planetesimal sizes (the radial drift problem).

Links
Science paper
Credit:
ALMA (ESO/NAOJ/NRAO)/S. Kraus (University of Exeter, UK)

Posted by sjrankin on 2017-10-17 01:24:56

Tagged: , 17 October 2017 , Edited , ESO , European Southern Observatory , V1247 Orionis , Star , Dust , Gas , Ring

V1247 Orionis, variant

V1247 Orionis, variant

Edited European Southern Observatory image of the star V1247 Orionis, set in a ring of dust and gas. Color/processing variant.

Original caption: This image from the Atacama Large Millimeter/submillimeter Array (ALMA) shows V1247 Orionis, a young, hot star surrounded by a dynamic ring of gas and dust, known as a circumstellar disc. This disc can be seen here in two parts: a clearly defined central ring of matter and a more delicate crescent structure located further out.

The region between the ring and crescent, visible as a dark strip, is thought to be caused by a young planet carving its way through the disc. As the planet orbits around its parent star, its motion creates areas of high pressure on either side of its path, similar to how a ship creates bow waves as it cuts through water. These areas of high pressure could become protective barriers around sites of planet formation; dust particles are trapped within them for millions of years, allowing them the time and space to clump together and grow.

The exquisite resolution of ALMA allows astronomers to study the intricate structure of such a dust trapping vortex for the first time. The image reveals not only the crescent-shaped dust trap at the outer edge of the dark strip, but also regions of excess dust within the ring, possibly indicating a second dust trap that formed inside of the potential planet’s orbit. This confirms the predictions of earlier computer simulations.

Dust trapping is one potential solution to a major stumbling block in current theories of how planets form, which predicts that particles should drift into the central star and be destroyed before they have time to grow to planetesimal sizes (the radial drift problem).

Links
Science paper
Credit:
ALMA (ESO/NAOJ/NRAO)/S. Kraus (University of Exeter, UK)

Posted by sjrankin on 2017-10-17 01:24:56

Tagged: , 17 October 2017 , Edited , ESO , European Southern Observatory , V1247 Orionis , Star , Dust , Gas , Ring

V1247 Orionis, variant

V1247 Orionis, variant

Edited European Southern Observatory image of the star V1247 Orionis, set in a ring of dust and gas. Color/processing variant.

Original caption: This image from the Atacama Large Millimeter/submillimeter Array (ALMA) shows V1247 Orionis, a young, hot star surrounded by a dynamic ring of gas and dust, known as a circumstellar disc. This disc can be seen here in two parts: a clearly defined central ring of matter and a more delicate crescent structure located further out.

The region between the ring and crescent, visible as a dark strip, is thought to be caused by a young planet carving its way through the disc. As the planet orbits around its parent star, its motion creates areas of high pressure on either side of its path, similar to how a ship creates bow waves as it cuts through water. These areas of high pressure could become protective barriers around sites of planet formation; dust particles are trapped within them for millions of years, allowing them the time and space to clump together and grow.

The exquisite resolution of ALMA allows astronomers to study the intricate structure of such a dust trapping vortex for the first time. The image reveals not only the crescent-shaped dust trap at the outer edge of the dark strip, but also regions of excess dust within the ring, possibly indicating a second dust trap that formed inside of the potential planet’s orbit. This confirms the predictions of earlier computer simulations.

Dust trapping is one potential solution to a major stumbling block in current theories of how planets form, which predicts that particles should drift into the central star and be destroyed before they have time to grow to planetesimal sizes (the radial drift problem).

Links
Science paper
Credit:
ALMA (ESO/NAOJ/NRAO)/S. Kraus (University of Exeter, UK)

Posted by sjrankin on 2017-10-17 01:24:55

Tagged: , 17 October 2017 , Edited , ESO , European Southern Observatory , V1247 Orionis , Star , Dust , Gas , Ring

Pléyades y cometa Panstarrs

Pléyades y cometa Panstarrs

60 exposiciones de 90 segundos con teleobjetivo 200 mm f/1.8, ISO 1.600, cámara Canon EOS 6D modificada. Centro, (AR): 03h 45m 39.227s,
(Dec.): +23° 48′ 16.552". Campo angular: 10.8º x 7.1º. Escala: 19.5 arcsec/pixel.

Pléyades, M45. Es un cúmulo estelar abierto que contiene estrellas calientes de tipo espectral B, ubicadas en la constelación Tauro. Está entre uno de los cúmulos estelares más cercanos a la Tierra, y es el cúmulo mejor visible a simple vista en el cielo nocturno. Las Pléyades albergan un prominente lugar en la mitología antigua, así como una diversidad de significados en diferentes culturas y tradiciones.
El cúmulo está dominado por estrellas calientes extremadamente azules y luminosas que se han formado en los últimos 100 millones de años. El polvo que forma una débil nebulosidad de reflexión alrededor de las estrellas más brillantes se pensó en un principio que provenía de una disgregación de la propia formación del cúmulo (de ahí el nombre alternativo para nebulosa Maia en vez de estrella Maia), pero ahora se sabe que es una nube de polvo no relacionada en el medio interestelar, a través de la cual las estrellas están pasando actualmente. Simulaciones por ordenador han mostrado que las Pléyades se formaron probablemente a partir de una configuración compacta que se asemeja a la nebulosa de Orión. Se estima que el grupo va a sobrevivir durante otros 250 millones de años, tiempo después del cual se dispersará debido a las interacciones gravitacionales con su vecindario galáctico.
El cúmulo tiene unos doce años luz de diámetro y contiene un total aproximado de 500 a 1.000 estrellas. Está dominado por estrellas azules jóvenes, de las cuales ocho pueden ser observadas a simple vista dependiendo de las condiciones atmosféricas (cielos muy limpios y ausencia de Luna): Taygeta (4,29), Pleione (5,05), Merope (4,14), Maia (3,87), Electra (3,72), Celaeno (5,45), Atlas (3,62) y Alcyone (2,85) (las números entre paréntesis indican las magnitudes aparentes).
El cúmulo está compuesto en una buena parte por enanas marrones —objetos con menos del 8 % de la masa solar—, los cuales son demasiado livianos para ser estrellas. Puede que estos objetos constituyan aproximadamente el 25 % de la población total del cúmulo, a pesar de que solo contribuyan al 2 % su masa total. También presentes en el cúmulo, están las enanas blancas, las cuales contradicen la edad estimada del cúmulo. Debido a la corta edad del cúmulo, no se espera que las estrellas normales puedan haber evolucionado para convertirse en enanas blancas. Se cree que, en vez de ser estrellas individuales de poca o mediana masa, los progenitores de estas estrellas eran masivas y orbitaban en sistemas binarios. Durante su rápida evolución, la transferencia de masa de la estrella más masiva a su acompañante, pudo haber acelerado su evolución hacia una enana blanca.
Las Pléyades se encuentra a unos 440 años luz.

TMC Nube Molecular de Tauro. Toda la imagen está ocupada por esta débil nebulosidad. Una nube molecular es una gran zona de gases y polvo en el espacio formada esencialmente por hidrógeno molecular y helio. Es un lugar de nacimiento de estrellas. La TMC se encuentra a unos 500 años luz y es una de las nubes moleculares más cercanas.

IC 354. Es una nebulosa en Taurus, remanente de una supernova.

IC 353. Es una amplia nebulosa de reflexión (unos 3º de longitud aparente) situada al noreste del cúmulo de las Pléyades, descubierta por E.E. Barnard en 1894.

NGC 1435, nebulosa de Mérope, nebulosa de Tempel. nebulosa de Tempel, es una nebulosa de reflexión difusa en el cúmulo abierto de las Pléyades, en la constelación de Tauro. Fue descubierta en 1859 por el astrónomo Wilhelm Tempel.
De magnitud aparente 13, NGC 1435 está enteramente iluminada por la estrella Merope (23 Tauri), que se halla totalmente rodeada por ella. NGC 1435 aparece en las fotografías de color azul por el fino polvo de carbono difundido por toda la nube. Aunque inicialmente se pensó que las Pléyades habían formado ésta y otras nebulosas circundantes, ahora se sabe que las Pléyades simplemente están atravesando la nebulosidad. Dista unos 440 años luz.

NGC 1432, nebulosa de Maya. Es una nebulosa de reflexión que rodea a la estrella Maya, perteneciente al grupo estelar de las Pléyades. NGC 1432 fue descubierto por los astrónomos franceses Paul-Pierre Henry y Prosper-Mathieu Henry en 1885.
El tamaño real de la nebulosa Maya es de unos 3,4 años luz.

IC 341. Es una nebulosidad en Taurus, se cree que remanente de una supernova.

IC 336. Es una nebulosa de emisión en la constelación de Taurus. Fue descubierta por Edward Emerson Barnard en 1893.

Cometa C/2015 ER61 PanSTARRS. Es un cometa, un objeto proveniente de la nube de Oort interior, asteroide cercano a la Tierra tipo Amor, y posiblemente una damocloide. Cuando se clasificó como planeta menor, tenía el cuarto afelio más grande de cualquier planeta menor conocido en el Sistema Solar, después de 2005 VX3, 2012 DR30 y 2013 BL76. Además, tenía la órbita más excéntrica de cualquier planeta menor conocido, con su distancia del Sol que variaba aproximadamente 99.9% durante el curso de su órbita, seguido por 2005 VX3 con una excentricidad de 0.9973. El 30 de enero de 2016, se clasificó como un cometa cuando estaba a 5,7 UA del Sol.
Aunque el núcleo del cometa fue probablemente levemente activo, las estimaciones iniciales de asteroides dieron una magnitud absoluta (H) de 12.3, lo que sugeriría un núcleo de 8-20 km de diámetro. Pero podría ser fácilmente la mitad de ese tamaño debido a la actividad que ilumina el núcleo.

60 exposures of 90 seconds with telephoto lens 200 mm f / 1.8, ISO 1600, modified Canon EOS 6D camera. Center, (AR): 03h 45m 39.227s,
(Dec.): + 23 ° 48 ‘16.552 "Angular field: 10.8 ° x 7.1 ° Scale: 19.5 arcsec / pixel.

Pleiades, M45. It is an open star cluster containing hot stars of spectral type B, located in the constellation Taurus. It is among one of the star clusters closest to the Earth, and is the cluster best visible to the naked eye in the night sky. The Pleiades harbor a prominent place in ancient mythology, as well as a diversity of meanings in different cultures and traditions.
The cluster is dominated by extremely blue and luminous hot stars that have formed in the last 100 million years. The dust that forms a faint nebulosity of reflection around the brightest stars was thought in a principle that came from a disintegration of the own formation of the cluster (hence the alternative name for Mayan nebula instead of Mayan star), but now knows that it is a cloud of unrelated dust in the interstellar medium, through which stars are currently passing. Computer simulations have shown that the Pleiades were probably formed from a compact configuration resembling the Orion Nebula. It is estimated that the group will survive for another 250 million years, after which it will disperse due to gravitational interactions with its galactic neighborhood.
The cluster is about twelve light-years in diameter and contains an approximate total of 500 to 1,000 stars. It is dominated by young blue stars, of which eight can be observed with the naked eye depending on atmospheric conditions (very clear skies and Moon absence): Taygeta (4,29), Pleione (5,05), Merope (4, 14), Maia (3.87), Electra (3.72), Celaeno (5.45), Atlas (3.62) and Alcyone (2.85) (numbers in parentheses indicate apparent magnitudes).
The cluster is largely composed of brown dwarfs – objects with less than 8% of the solar mass – which are too light to be stars. These objects may constitute approximately 25% of the total population of the cluster, although only 2% contribute their total mass. Also present in the cluster are the white dwarfs, which contradict the estimated age of the cluster. Due to the short age of the cluster, normal stars are not expected to have evolved to become white dwarfs. It is believed that, instead of being single stars of small or medium mass, the progenitors of these stars were massive and orbited in binary systems. During its rapid evolution, the transfer of mass from the most massive star to its companion, may have accelerated its evolution towards a white dwarf.
The Pleiades is about 440 light-years away.

TMC Taurus Molecular Cloud. The whole image is occupied by this weak cloudiness. A molecular cloud is a large area of gases and dust in space consisting essentially of molecular hydrogen and helium. It is a birthplace of stars. TMC is about 500 light-years away and is one of the closest molecular clouds.

IC 354. It is a nebula in Taurus, remnant of a supernova.

IC 353. It is a large reflection nebula (about 3 ° apparent length) located to the northeast of the Pleiades cluster, discovered by E.E. Barnard in 1894.

NGC 1435, Mérope nebula, Tempel nebula. Tempel nebula, is a fuzzy reflection nebula in the open cluster of the Pleiades, in the constellation Taurus. It was discovered in 1859 by the astronomer Wilhelm Tempel.
Of apparent magnitude 13, NGC 1435 is entirely illuminated by the star Merope (23 Tauri), which is completely surrounded by it. NGC 1435 appears in blue photographs because of the fine carbon dust spread throughout the cloud. Although it was initially thought that the Pleiades had formed this and other surrounding nebulae, it is now known that the Pleiades are simply passing through the cloud. It is about 440 light years away.

NGC 1432, Maya nebula. It is a nebula of reflection that surrounds to the Mayan star, pertaining to the stellar group of the Pleiades. NGC 1432 was discovered by French astronomers Paul-Pierre Henry and Prosper-Mathieu Henry in 1885.
The actual size of the Maya nebula is about 3.4 light years.

IC 341. It is a nebulosity in Taurus, believed to be remnant of a supernova.

IC 336. It is a nebula of emission in the constellation of Taurus. It was discovered by Edward Emerson Barnard in 1893.

Cometa C / 2015 ER61 PanSTARRS. It is a comet, an object coming from the inner Oort cloud, near Earth-like asteroid Love, and possibly a damocloid. When it was classified as minor planet, it had the fourth largest aphelion of any known smaller planet in the Solar System, after 2005 VX3, 2012 DR30 and 2013 BL76. In addition, it had the most eccentric orbit of any known smaller planet, with its distance from the Sun varying approximately 99.9% during the course of its orbit, followed by 2005 VX3 with an eccentricity of 0.9973. On January 30, 2016, it was classified as a comet when it was at 5.7 AU from the Sun.
Although the comet nucleus was probably slightly active, initial estimates of asteroids gave an absolute magnitude (H) of 12.3, suggesting a core 8-20 km in diameter. But it could easily be half that size due to the activity that illuminates the core.

Posted by StarryEarth on 2017-10-25 22:30:19

Tagged: , Pléyades , pleiades , Toto , Taurus , cúmulo , cluster , nebula , nebulosa , star , estrella , constellation , constelación , Barnard , Merope , Maya , Maia , Cloud , Molecular

V1247 Orionis, variant

V1247 Orionis, variant

Edited European Southern Observatory image of the star V1247 Orionis, set in a ring of dust and gas. Color/processing variant.

Original caption: This image from the Atacama Large Millimeter/submillimeter Array (ALMA) shows V1247 Orionis, a young, hot star surrounded by a dynamic ring of gas and dust, known as a circumstellar disc. This disc can be seen here in two parts: a clearly defined central ring of matter and a more delicate crescent structure located further out.

The region between the ring and crescent, visible as a dark strip, is thought to be caused by a young planet carving its way through the disc. As the planet orbits around its parent star, its motion creates areas of high pressure on either side of its path, similar to how a ship creates bow waves as it cuts through water. These areas of high pressure could become protective barriers around sites of planet formation; dust particles are trapped within them for millions of years, allowing them the time and space to clump together and grow.

The exquisite resolution of ALMA allows astronomers to study the intricate structure of such a dust trapping vortex for the first time. The image reveals not only the crescent-shaped dust trap at the outer edge of the dark strip, but also regions of excess dust within the ring, possibly indicating a second dust trap that formed inside of the potential planet’s orbit. This confirms the predictions of earlier computer simulations.

Dust trapping is one potential solution to a major stumbling block in current theories of how planets form, which predicts that particles should drift into the central star and be destroyed before they have time to grow to planetesimal sizes (the radial drift problem).

Links
Science paper
Credit:
ALMA (ESO/NAOJ/NRAO)/S. Kraus (University of Exeter, UK)

Posted by sjrankin on 2017-10-17 01:24:55

Tagged: , 17 October 2017 , Edited , ESO , European Southern Observatory , V1247 Orionis , Star , Dust , Gas , Ring