By Definition
High Definition
Standard Definition
By Length
Full (4-12 min)
Short (1-4 min)
By Date
2015 | 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!
Chandra Sketches
Light
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
Light Beyond the Bulb: Over and Beyond the Rainbow
Light Beyond the Bulb: Over and Beyond the Rainbow
While scientists and philosophers have tried to figure out exactly what light is for millennia, it's only been in the past several hundred years or so that we've really started to figure it out. (2015-07-01)


Perseus A in 60 Seconds

View/Listen
Narrator (Megan Watzke, CXC): The giant galaxy, Perseus A, which is also known as NGC 1275, is a well-known source of strong radio radiation. This object is also a bright emitter of X-rays due to the presence of a supermassive black hole at the center of the galaxy. This mammoth galaxy lies at the center of the cluster of galaxies known as Perseus.

By combining images from several telescopes into a single composite, the dynamics of the galaxy are more easily visible. Detail and structure from X-ray, optical and radio wavelengths combine for a beautiful yet violent depiction of the events going on at the heart of the galaxy. In the composite image, the X-ray data are seen as the soft purple shells around the outside of the galaxy. The pinkish lobes toward the center of the galaxy are from radio frequencies. The radio emission, tracing jets from the black hole, fills the X-ray cavities. Dust lanes, star-forming regions, hydrogen filaments, foreground stars and background galaxies are all contributions from Hubble’s optical data.

Return to Podcasts