Astrophysik: Gravitationslinsen Scene Info click for Module Menu Start Branching Point Module: Astrophysik: Gravitationslinsen Sequence: Start Slide: Slide: A Galaxy Produces a Multi-image of a Quasar Branching Point: The visible sky is nothing but an optical fraud Sequence: (1) Prinzip Slide: Why does a mass act like a lens ? Slide: Why does a mass act like a lens ? Slide: Why does a mass act like a lens ? Slide: Mass distributions acting as lenses Slide: Glas lens visualizing the effect of a gravitational lens Slide: Extreme Deflections Slide: Strange Optics Slide: Cosmic Distortions Slide: The image of the sky is permanently changing Slide: Encounter of third degree Sequence: (2) History Slide: Early speculations Slide: Einsteins triumph Slide: Einstein remains sceptical Slide: ... an odd publication Slide: Galaxies as gravitational lenses Sequence: (3) Astrophysics Branching Point: Gravitational Lenses as Tools in Astrophysics Sequence: (3.1) galaxies Slide: How Massive is a Galaxy ? Slide: How Massive is a Galaxy Cluster ? Slide: How Massive is a Galaxy Cluster ? Sequence: (3.3) Hubble Slide: How Does the Universe Expand ? Sequence: (3.4) planets Slide: Slide: Planets in Foreign Solar Systems Back Forward How Massive is a Galaxy Cluster ? The galaxy cluster Abell 2218 (here an image taken from the space telescope Hubble) is two billion light years away. It consists of roughly thousand galaxies. Source: NASA/STScl, 1995 [ Sitemap ] [ info ] This website was created with Virtual Spaces.