| Dictionary, Encyclopedia and Thesaurus - The Free Dictionary 1,774,850,638 visitors served. |
|
Dictionary/ thesaurus | Medical dictionary | Legal dictionary | Financial dictionary | Acronyms | Idioms | Encyclopedia | Wikipedia encyclopedia | ? |
gravitational lens |
Also found in: Wikipedia | 0.01 sec. |
|
gravitational lens [‚grav·ə′tā·shən·əl ′lenz] (astronomy) A massive galaxy or other massive object whose gravitational field focuses light from a distant quasar near or along its line of sight, giving a double or multiple image of the quasar. 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. |
|
| ? Mentioned in | ? References in periodicals archive | |
|---|---|---|
Using Sloan data, the team picked out large, elliptical galaxies capable of acting as gravitational lenses. Tyson adds that the prevalence of gravitational lenses provides another test of whether or not the universe has revved up the rate at which it is expanding, as recent studies of distant supernovas have indicated (SN: 4/7/01, p. This gravitational illusion, based on the principle that gravity distorts the path of light, was first proposed by Albert Einstein in 1916, and astronomers have seen the handiwork of gravitational lenses with ground-based telescopes since the late 1970s. |
| Encyclopedia |
| 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 |
|---|