Gravitational microlensing, simulation

Référence de la vidéo 11944784
Gravitational microlensing. This simulation shows the brightening of a background star caused by gravitational microlensing. It follows the journey through space of a planetary system (known as OGLE-2005-BLG-169L), between 1992 and 2011. When it passes directly in front of the more distant star in 2005, the momentary alignment magnifies and brightens the light from the background star. In gravitational microlensing the mass of the foreground object is too low for the displacement of light to be observed easily, but the apparent brightening of the source may still be detected. Ground-based observations in 2005 of planetary system OGLE-2005-BLG-169L identified this gravitational microlensing effect. In 2011, the Hubble Space Telescope observed the objects separating as they passed out of alignment, and confirmed that the model was correct.
Licence : Droits gérés
Crédit : Science Photo Library / HUBBLE / ESA / LARS LINDBERG CHRISTENSEN
Model Release : Non requis
Durée : 01:21 Minutes
Aspect ratio : 16/9
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