Signature of dark matter. Second in a series of three colour-coded images showing a possible gravitational lensing event by a brown dwarf star in the halo around our galaxy. The arrow points to a star in the Large Magellanic Cloud (LMC) at the peak of the lensing event. A brown dwarf is a type of star-like object too small to 'burn',and is thus almost invisible,but still has a gravity field strong enough to act as a lens. As a type of MACHO (Massive Compact Halo Object) it could help account for the missing 'dark matter' which should make up about 90% of the mass of the Universe. Compare with R670/044 and R670/046 | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Alcock, Dr. Charles / Ames |
Taille de l’image : | 4185 px × 4172 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |