Resources
Q & A
Glossary
Acronym Guide
Further Reading
Outside the Site
Google Sky
WWT
Facebook
Youtube
Twitter
Flickr
Pinterest
Multimedia, Etc
Images/Illustrations
Animation & Video
Special Features
Chandra Podcasts
Desktop Images
The Big Chandra Picture
Presentations
Handouts
Screen Savers
Audio
Web Shortcuts
Chandra Blog
RSS Feed
Chronicle
Email Newsletter
News & Noteworthy
Image Use Policy
Questions & Answers
Glossary of Terms
Download Guide
Get Adobe Reader
Q&A: Supernova Remnants and Neutron Stars

Q:
I saw a photo designated Cas A that is labeled as a 320 year old event from a location 10,000 light years away. I was wondering how the event could have happened 320 years ago and the radiation that produced the image arrive in time for me to view it. Have I misread the caption?

A:
We have a special section explaining the age of Cas A. Try http://chandra.harvard.edu/photo/1999/0237/age.html

Back | Index | Next