By Definition
High Definition
Standard Definition
By Length
Full (4-12 min)
Short (1-4 min)
By Date
2014 | 2013 | 2012 | 2011 | 2010
2009 | 2008 | 2007 | 2006
By Category
Solar System
Stars
White Dwarfs
Supernovas
Neutron Stars
Black Holes
Milky Way Galaxy
Normal Galaxies
Quasars
Groups of Galaxies
Cosmology/Deep Field
Miscellaneous
HTE
STOP
Space Scoop for Kids!
Subscribe
How To
Apple iTunes
RSS Reader
Web Shortcuts
Chandra Blog
RSS Feed
Chandra Mobile
Chronicle
Email Newsletter
News & Noteworthy
Image Use Policy
Questions & Answers
Glossary of Terms
Download Guide
Get Adobe Reader
Recent Podcast
Tour of WASP-18
Tour of WASP-18
A new study using data from Chandra X-ray Observatory has shown that a planet is making the star that it orbits act much older than it actually is. (2014-09-18)


M31 in 60 Seconds

View/Listen
Narrator (Joseph DePasquale, CXC): Many consider Andromeda, also known as Messier 31, to be a sister galaxy to our own Milky Way. At a distance of only 2.5 million light years away, Andromeda is relatively close to our Galaxy. It is also a spiral galaxy like the Milky Way, and has many similar characteristics. However, a new study using data from NASA's Chandra X-ray Observatory has pointed out some interesting differences between these two galaxies when it comes to black holes. After combining over 150 Chandra observations spread over 13 years, researchers discovered 26 new black hole candidates in Andromeda. This is largest number to date found in a galaxy outside our own. Falling into the stellar-mass category, these black holes form when the most massive stars collapse. The result is a black hole that typically has between five and ten times the mass of the Sun. Seven of these black hole candidates are within 1,000 light years of Andromeda's center, more than what is found near the center of our Milky Way's core. This highlights that although Andromeda and the Milky Way are alike in many ways, they do have their differences. Astronomers have long known that the bulge of stars in Andromeda is bigger as is the super massive black hole at its center. Now we know that it may be a better producer of small black holes as well.

Return to Podcasts