| Dictionary, Encyclopedia and Thesaurus - The Free Dictionary 1,784,597,750 visitors served. |
|
Dictionary/ thesaurus | Medical dictionary | Legal dictionary | Financial dictionary | Acronyms | Idioms | Encyclopedia | Wikipedia encyclopedia | ? |
LISM |
0.01 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 |
|---|
Those findings, says Stachnik, "opened the window on the extreme ultraviolet," proving that the local interstellar medium had a density of hydrogen atoms low enough to permit observations near Earth. But by relying on previous estimates of the total (both neutral and ionized) helium and hydrogen left over from the Big Bang, astronomers can now infer the amount of ionized helium in the local interstellar medium created by more recent violent events. |
| 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 |
|---|