stellar evolution

Nearby Ancient Star is Almost as Old as the Universe

February 23, 2013

Want to stay on top of all the space news? Follow @universetoday on Twitter A metal-poor star located merely 190 light-years from the Sun is 14.46+-0.80 billion years old, which implies that the star is nearly as old as the Universe!  Those results emerged from a new study led by Howard Bond.  Such metal-poor stars are [...]

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“Proplyd-like” Objects Discovered in Cygnus OB2

January 15, 2012

The well known Orion Nebula is perhaps the most well known star forming regions in the sky. The four massive stars known as the trapezium illuminate the massive cloud of gas and dust busily forming into new stars providing astronomers a stunning vista to explore stellar formation and young systems. In the region are numerous [...]

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NSV 11749 – Born Again and Grown Old

December 3, 2011

In 1996, a Japanese amateur astronomer discovered a new star in the constellation Sagittarius. Dubbed V4334 Sgr, astronomers initially expected it to be a typical novae, but closer examination revealed it to be a previously predicted but unseen event known as a “Very Late Thermal Pulse” (VLTP), the last hurrah of a white dwarf as [...]

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Guest Post by Author Peter Shaver: Cosmic Time Scales

October 18, 2011

Editor’s note: Peter Shaver is the author of the new book “Cosmic Heritage – Evolution from the Big Bang to Conscious Life.” Find out here how you can win a copy! The universe has gone through a number of distinct phases. The first part of the first second is speculative, but the physics of the [...]

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“Impossible” Star Exists in Cosmic Forbidden Zone

September 1, 2011

Astronomers say a newly found star should not exist and is in the “forbidden zone” of a widely accepted theory of star formation. The star, called SDSS J102915+172927, is composed almost entirely of hydrogen and helium, with only remarkably small amounts of other chemical elements in it. And how should this star be classified? We [...]

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