First Page | Document Content | |
---|---|---|
Date: 2015-02-12 07:18:48Quasar Radio astronomy Physics Gravitational lens Active galactic nucleus Galaxy Twin Quasar Cloverleaf quasar Astronomy General relativity Gravitational lensing | Astronomers using Hubble discover quasars acting as gravitational lensesAdd to Reading ListSource URL: phys.orgDownload Document from Source WebsiteFile Size: 36,94 KBShare Document on Facebook |