Terrarock Sunrise-Sunset by MagikUnicorn

Terragen • Landscape • posted on Jan 07, 2009

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Description

Terragen at work today... (Under SnowStorm) *** S P A C E *** N E W S *** Some stars go ballistic, racing through interstellar space like bullets and tearing through clouds of gas. The stars are plowing through regions of dense interstellar gas, creating brilliant arrowhead structures and trailing tails of glowing gas. These arrowheads, or bow shocks, form when the stars' powerful stellar winds, streams of matter flowing from the stars, slam into surrounding dense gas. The phenomenon is similar to that seen when a speeding boat pushes through water on a lake. "We think we have found a new class of bright, high-velocity stellar interlopers," said Sahai. "Finding these stars is a complete surprise because we were not looking for them. When I first saw the images, I said, 'Wow. This is like a bullet speeding through the interstellar medium.' Hubble's sharp 'eye' reveals the structure and shape of these bow shocks." The astronomers can only estimate the ages, masses and velocities of these renegade stars. The stars appear to be young -- just millions of years old. Their ages are based partly on their strong stellar winds. Most stars produce powerful winds either when they are very young or very old. Only very massive stars greater than 10 times the sun's mass have stellar winds throughout their lifetimes. But the objects observed by Hubble are not very massive because they do not have glowing clouds of ionized gas around them. They are medium-sized stars that are a few to eight times more massive than the sun. The stars are not old because the shapes of the nebulae around aging, dying stars are very different, and old stars are almost never found near dense interstellar clouds. Depending on their distance from Earth, the bullet-nosed bow shocks could be 100 billion to a trillion miles wide (the equivalent of 17 to 170 solar system diameters, measured out to Neptune 's orbit). The bow shocks indicate that the stars are traveling fast, more than 180,000 kilometers an hour (more than 112,000 miles an hour) with respect to the dense gas they are plowing through, which is roughly five times faster than typical young stars. "The high-speed stars were likely kicked out of their homes, which were probably massive star clusters," Sahai said. There are two possible ways this stellar expulsion could have happened. One way is if one star in a binary system exploded as a supernova and the partner got kicked out. Another scenario is a collision between two binary-star systems or a binary system and a third star. One or more of these stars could have picked up energy from the interaction and escaped the cluster. Assuming their youthful phase lasts only a million years and they are moving at roughly 180,000 kilometers an hour (about 112,000 mph), the stars have traveled about 160 light-years. Runaway stars have been seen before. The joint European-NASA Infrared Astronomical Satellite, which performed an all-sky infrared survey in 1983, spied a few similar-looking objects. The first observation of these objects was in the late 1980s. But those stars produced much larger bow shocks than the stars in the Hubble study, suggesting that they are more massive stars with more powerful stellar winds. "The stars in our study are likely the lower-mass and/or lower-speed counterparts to the massive stars with bow shocks detected by the Infrared Astronomical Satellite," Sahai explained. "We think the massive runaway stars observed before were just the tip of the iceberg. The stars seen with Hubble may represent the bulk of the population, both because many more lower-mass stars inhabit the universe than higher-mass stars, and because a much larger number are subject to modest speed kicks." Thanks Magik

Comments (65)

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shadownet

5:40PM | Wed, 07 January 2009

Great work. I like the first one best.

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jeroni

5:51PM | Wed, 07 January 2009

Beautiful composition

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Antonio57

5:55PM | Wed, 07 January 2009

Le ciel du dessin du bas est magnifique!!!!!Bravo Réal

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claude19

5:55PM | Wed, 07 January 2009

Tu dois déguster actuellement, avec cette tempête de neige, car à Paris il a fait -20°c hier et chez moi à REZE, -7°C, normal car pas loin du Golf Stream ! Très belle étude d'éclairage

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myquad

5:57PM | Wed, 07 January 2009

Beautiful scenes!

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brycek

5:57PM | Wed, 07 January 2009

Beautiful work..love them both!!

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DarkStormCrow

6:09PM | Wed, 07 January 2009

Excellent!

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jocko500

6:45PM | Wed, 07 January 2009

very cool

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THROBBE

6:47PM | Wed, 07 January 2009

Beautiful render!

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MarciaGomes

6:52PM | Wed, 07 January 2009

SENSACIONAIS IMAGENS MEU AMIGO FANTÁNTÁSTICA ILUMINAÇÃO,++++++++++5 ESPLÊNDIDO TEXTO.

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BenBischop

7:06PM | Wed, 07 January 2009

Terrarock in one day....Cool Render....;)

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1358

7:20PM | Wed, 07 January 2009

very honest and realistic images.... sorry to hear about the snowstorm.... we just had a day of freezing rain....

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CarolSassy

7:34PM | Wed, 07 January 2009

Fantastic lighting 'n' shadows! Very nice terrains 'n' atmospheres! (:

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bpclarke

7:50PM | Wed, 07 January 2009

Very cool! Love the atmospheres and lighting on these. Excellent work! Bunny

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DennisReed

8:01PM | Wed, 07 January 2009

Stunning Terragen work MU! Cool info on the Stars my Spacey Friend!

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Savage_dragon

8:10PM | Wed, 07 January 2009

Gonna' need to borrow those sun glasses, my friend. Bright 'n beautiful! ")

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amota99517

8:24PM | Wed, 07 January 2009

Awesome work on this one!!!

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hipps13

8:48PM | Wed, 07 January 2009

Interesting info, Magik awesome work too warm hug, Linda

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eekdog

8:53PM | Wed, 07 January 2009

amasing bryce. well done magik. love too see more. steve

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Kaartijer

9:02PM | Wed, 07 January 2009

Excellent work, Magik! Thanks for the "News"!!!

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magnus073

9:03PM | Wed, 07 January 2009

Magik j'apprécie toujours votre art tant de mon ami. Ces images sont grandes et semblent très réalistes. Le merci aussi pour la description vous avez fourni

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Faemike55

9:28PM | Wed, 07 January 2009

Very good images. Liked the article! Thank you!

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evielouise

9:52PM | Wed, 07 January 2009

Well your just full of information tonight now aren't you (smile}} love them all they are a tresure for sure hugs )) I hear your having abad strom I just got off the phone with nicole from anjou she say's she is ready to come back lol::: stay warm and safe::

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