stellar evolution
Is Eta Carinae Heading Toward Another Eruption?
Massive stars can devastate their surroundings, unleashing hot winds and blasting radiation. With a mass over 100 times heavier than…
Dazzling New Views of a Familiar Cluster
Wow. It’s always amazing to get new views of familiar sky targets. And you always know that a “feast for…
When Is a Star Not a Star?
When it's a brown dwarf -- but where do we draw the line? Often called "failed stars," brown dwarfs are…
Nearby Ancient Star is Almost as Old as the Universe
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…
“Proplyd-like” Objects Discovered in Cygnus OB2
[/caption] The well known Orion Nebula is perhaps the most well known star forming regions in the sky. The four…
NSV 11749 – Born Again and Grown Old
[/caption] In 1996, a Japanese amateur astronomer discovered a new star in the constellation Sagittarius. Dubbed V4334 Sgr, astronomers initially…
Guest Post by Author Peter Shaver: Cosmic Time Scales
[/caption] Editor's note: Peter Shaver is the author of the new book "Cosmic Heritage – Evolution from the Big Bang…
“Impossible” Star Exists in Cosmic Forbidden Zone
[/caption] Astronomers say a newly found star should not exist and is in the “forbidden zone” of a widely accepted…
Slowing Down Stars
[/caption] One of the long standing challenges in stellar astronomy, is explaining why stars rotate so slowly. Given their large…
Early Stars Were Whirling Dervishes
[/caption] Even though some of the first stars in the early universe were massive, they probably lived fast and furious…