Readers can learn about the latest advancements in X-ray astronomy, and how the newest generation of instruments are making observations of the behavior of light, matter, and space-time in the vicinity of black holes. These observations are then compared to results predicted by Einstein's General Theory of Relativity. Links to a glossary are imbedded in the text of the article.

No specific technical requirements, just a browser required

No cost

NASA materials may not be used to state or imply the endorsement by NASA or by any NASA employee of a commercial product, service or activity, or used in any other manner that might mislead. NASA should be acknowledged as the source of its material. It is unlawful to falsely claim copyright or other rights in NASA material. NASA shall in no way be liable for any costs, expenses, claims or demands arising out of use of NASA's cassettes and photographs by a recipient or a recipient's distributees. NASA personnel are not authorized to sign indemnity or hold harmless statements, releases from copyright infringement, or documents granting exclusive use rights.

Contributor: Dr Jim Lochner
The High Energy Astrophysics Science Archive Research Center