| Dictionary, Encyclopedia and Thesaurus - The Free Dictionary 1,760,606,544 visitors served. |
|
Dictionary/ thesaurus | Medical dictionary | Legal dictionary | Financial dictionary | Acronyms | Idioms | Encyclopedia | Wikipedia encyclopedia | ? |
XRB |
Also found in: Encyclopedia, Wikipedia | 0.02 sec. |
How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
|
| ? References in periodicals archive |
|---|
266), and Giacconi still uses data from the orbiting Chandra X-ray Observatory to study sources that make up the X-ray background. An astronomer with a long history and expertise in deep surveys, Giacconi was the principal investigator of the program which discovered the first X-ray stars and the X-ray background in the 1960s and conceived of and led the implementation of the Uhuru and Einstein X-ray Observatories in the 1970s. The source of X-ray background is "just the sort of thing one hoped Chandra would discover," comments astronomer Roger D. |
| Acronyms and Abbreviations |
| Free Tools: |
For surfers:
Free toolbar & extensions |
Word of the Day |
Help
For webmasters: Free content | Linking | Lookup box | Double-click lookup | Partner with us |
|---|