MoEnzyme
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First Extragalactic Exoplanet Found
« on: 2010-11-19 03:51:51 » |
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[Mo] Rather interesting discovery. Very un-Earthlike planet so I doubt there is any intelligent life there, but still potentially a very rich source of scientific understanding about the universe we live in. Unlike many other finds, this moves our knowledge well beyond our neighborhood.
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Mo
Scientists discover planet from another galaxy
Quote:A planet with a minimum mass 1.25 times that of Jupiter has been discovered orbiting a star of extragalactic origin, even though the star now finds itself within our own galaxy.
It is part of the so-called Helmi stream - a group of stars that originally belonged to a dwarf galaxy that was devoured by our galaxy, the Milky Way, in an act of galactic cannibalism about six to nine billion years ago. |
http://sify.com/news/scientists-discover-planet-from-another-galaxy-news-international-kltm4fchfhb.html
Cosmic "cannibalism" brings new planet to Milky Way
Quote:Over the last 15 years, astronomers have detected nearly 500 planets orbiting stars in our cosmic neighborhood, but none from outside our Milky Way galaxy has yet been confirmed.
"This discovery is very exciting," said Rainer Klement, also of the Max Planck Institute. "Because of the great distances involved, there are no confirmed detections of planets in other galaxies. But this cosmic merger has brought an extragalactic planet within our reach." |
This artist’s impression shows HIP 13044 b, an exoplanet orbiting a star that entered our galaxy, the Milky Way, from another galaxy.
Credit: Reuters/European Southern Observatory/L. Calcada/Handout
http://in.reuters.com/article/idINTRE6AH4UD20101118?mlt_click=Master+Sponsor+Logo_6_*Top+Story_sec-col1-m0_News
First Extragalactic Exoplanet Found
Quote:As soon as the planet was discovered, astronomers realized that this particular body could change their theories about how planets form, and about how much beating they can take from their star before they are destroyed.
This particular exoplanet, which has been dubbed HIP 13044b, resides around a star that is extremely old, and also metal-poor, which means it features only negligible amounts of chemical elements heavier than hydrogen and helium.
In fact, it would appear that this planet is very resilient. Its parent star has long since passed through its red giant phase, which is when the stellar outer atmosphere engorges and enlarges by a large amount.
When the Sun will pass through this stage, its surface will nearly reach Mars, destroying Mercury, Venus and Earth entirely. HIP 13044b was apparently able to survive disaster in its own system, astronomers say. |
http://news.softpedia.com/news/First-Extragalactic-Exoplanet-Found-167453.shtml
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