Evropská jižní observatoř

Kategorie: Kosmologie, Zpět na celou fotogalerii.

Popis (v anglickém jazyce):

This image is based on three exposures from the WFPC2 camera at the NASA/ESA Hubble Space Telescope , obtained in the V-, R- and I-bands (shown as blue, green and red, respectively). It shows the first image of a Dark Matter object - a MACHO (a massive compact object). It is the red object that is indicated with an arrow and very near to the upper left (at 2 o''clock) of a blue background star. This MACHO is a nearby red dwarf star that gravitationally focused light from the blue background star in another galaxy in a so-called microlensing event. Since the event six years ago, the MACHO has moved 0.134 arcseconds on the sky and can now be clearly separated in the Hubble image.

Odkaz na další informace na www.eso.org (stránka v AJ)