Spacebuzz

Blog posts tagged with stellar evolution

Posts in the past four weeks

Monday
Apr 07 2014
17:14 UTC

Quasars Tell The Story Of How Fast The Young Universe Expanded

For those who saw the Cosmos episode on William Herschel describing telescopes as time machines, here is a clear example of that. By examining 140,000 objects called quasars¬(galaxies with an active black hole at their centers), astronomers have charted the expansion rate of the universe — not now, but 10. 8 billion years ago. This is […]

Posted by Universe Today

Tuesday
Apr 01 2014
15:45 UTC

Starquake! How Super-Suns Swing, And What It Could Look Like

Much like how an earthquake can teach us about the interior of the Earth, a starquake shows off certain properties about the inside of a star. Studying the closest star we have (the sun) has yielded information about rotation, radius, mass and other properties of stars that are similar to our own. But how do […]

Posted by Universe Today

Friday
Mar 28 2014
13:31 UTC

A Mystery Star Wrapped in a Stingray

How can a star heat up by 40,000 K in just 30 years? Reindl et al. explore the star at the heart of the Stingray Nebula to find out.

Posted by astrobites

Thursday
Mar 27 2014
19:54 UTC

Stunning 3D Tours of Two Well-Known Nebulae

Two videos recently released by the Hubble team take us on a tour of two famous and intriguing cosmic objects: the stellar wind-blown¬“celestial snow angel” Sharpless 2-106 and the uncannily equine Horsehead Nebula, imaged in infrared wavelengths by the HST. Using Hubble imagery complemented with data from the Subaru Infrared Telescope and ESO's Visible and […]

Posted by Universe Today

Friday
Mar 21 2014
13:10 UTC

A New Way to Die: What Happens to Supermassive Stars?

Supermassive black holes are everywhere in our Universe, but we don't know where they came from. Supermassive stars could have given birth to these massive objects. However, that is not all these fifty to one hundred solar mass stars could be responsible for...

Posted by astrobites

Tuesday
Mar 18 2014
14:20 UTC

Dusty Galaxies Shine Across The Universe In New Herschel Survey

While dust is easy to ignore in small quantities (says the writer looking at her desk), across vast reaches of space this substance plays an important role. Stick enough grains together, the theory goes, and you'll start to form rocks and eventually planets. On a galaxy-size scale, dust may even effect how the galaxy evolves. […]

Posted by Universe Today

Monday
Mar 17 2014
13:52 UTC

Hubble Captures Starbirth In A Monkey's Head As Telescope Approaches 24 Years In Space

Billowing gas clouds and young stars feature in this February Hubble Space Telescope image, released as the telescope approaches its 24th birthday this coming April. The telescope has seen a lot of drama over the years, but in this case, thankfully the excitement is taking place 6,400 light-years away. Here you can see starbirth in […]

Posted by Universe Today

Thursday
Mar 13 2014
16:11 UTC

Death Stars Caught Blasting Proto-Planets

¬It's a tough old universe out there. A young star has lots to worry about, as massive stars just beginning to shine can fill a stellar nursery with a gale of solar wind. No, it's not a B-movie flick: the Death Stars of Orion are real. Such monsters come in the form of young, O-type […]

Posted by Universe Today

Wednesday
Mar 12 2014
16:10 UTC

Astronomers Identify the Largest Yellow Hypergiant Star Known

... stellar monster lurks in heart of the Centaur. A recent analysis of a star¬in the south hemisphere constellation of Centaurus has highlighted the role that amateurs play in assisting with professional discoveries in astronomy. The find used of the European Southern Observatory's Very Large Telescope based in the Atacama Desert in northern Chile ¬as […]

Posted by Universe Today

Wednesday
Mar 12 2014
12:57 UTC

Did Old Galaxies Grow Up Quicker Than New Ones?

Did some of the oldest galaxies grow up quickly? That's an intriguing possibility raised by a research team that found “mature” galaxies some 12 billion light years away, when the universe was less than 2 billion years old. “Today the universe is old and filled with galaxies that have largely stopped forming stars, a sign […]

Posted by Universe Today

Tuesday
Mar 11 2014
18:16 UTC

One Star, Two Star, Brown Star, Blue Star

Enter the observed oddball: a subdwarf B (sdB) star. These unexpected stars are fusing helium into carbon and oxygen in their core and only have a thin hydrogen envelope. So, where did the hydrogen go?

Posted by astrobites

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