Technology M31 velocity vector

1. The M31 Velocity Vector.I. Hubble Space Telescope Proper Motion Measurements Sangmo Tony Sohn, Jay Anderson, and Roeland P. van der MarelarXiv:1205.6863v1 [astro-ph.GA]…

Documents The extragalactic universe and distance measurements Discovery of the extragalactic universe The...

Slide 1 The extragalactic universe and distance measurements Discovery of the extragalactic universe The cosmic distance ladder. Slide 2 Slide 3 X-RAY Slide 4 Gamma Ray IR…