Astronomers discovered 44 ancient stars using gravitational lensing—an astrophysicist explains how they did it
A group of astronomers have made history by capturing an image of a record number of stars from a time when the universe was ...
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New NASA robot with X-ray vision will watch Earth 'breathing' from the moon
NASA's LEXI instrument is set to land on the moon's surface sometime this month. Using X-ray sensors, the device will watch ...