Explanation: The famous "Einstein Cross" is a case where a single object is seen four times. Here a very distant QSO happened to be placed right behind a massive galaxy. The gravitational effect of the galaxy on the distant QSO was similar to the lens effect of an empty wine glass on a distant street light - it created multiple images. But stars in the foreground galaxy have been found to act as gravitational lenses here too! These stars make the images change brightness relative to each other. These brightness changes are visible on these two photographs of the Einstein Cross, taken about 3 years apart.

<<  Dekabr'  >> Pn Vt Sr Cht Pt Sb Vs             1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31           1995   1996   1997 1998   1999   2000 2001   2002   2003 2004   2005   2006 2007   2008   2009 2010   2011   2012 2013   2014   2015 2016   2017   2018 2019   2020   2021 2022   2023   2024

Yanvar' Fevral' Mart Aprel' Mai Iyun' Iyul' Avgust Sentyabr' Oktyabr' Noyabr' Dekabr'

Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.

Publikacii s klyuchevymi slovami: microlensing - Einstein cross - Mikrolinzirovanie - Krest Einshteina - kvazary - gravitacionnaya linza Publikacii so slovami: microlensing - Einstein cross - Mikrolinzirovanie - Krest Einshteina - kvazary - gravitacionnaya linza
Sm. takzhe: Rasplavlennaya galaktika i kol'co Einshteina Usmeshka gravitacii Kvazar v rannei Vselennoi SN Rekviem: sverhnovaya, kotoruyu uvideli tri raza Gravitacionnaya linza "Krest Einshteina" Eibell 3827: skoplenie-kannibal i gravitacionnaya linza Samaya dalekaya iz vseh izvestnyh zvezd? Vse publikacii na tu zhe temu >>