NASA is putting an 'artificial star' in orbit around Earth

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Illustration of Earth as seen far from space with stars in the background
NASA aims to launch a mini satellite the size of a bread box that could become one of the most important astronomical tools by the end of this decade.

RomoloTavani/Getty Images

The largest map of the cosmos hints that dark energy is changing. It could prove Einstein wrong and upend a pillar of modern physics.

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hubble ultra deep field faint galaxies
Astronomers are mapping millions of galaxies in our universe to better understand dark energy.

NASA/ESA/H. Teplitz and M. Rafelski, A. Koekemoer, R. Windhorst, and Z. Levay

Scientists built a 3-ton camera with a 5-foot-wide lens to discover hazardous asteroids that NASA can't see

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giant camera black segmented tube with lens inside on a white engineering mount in a cleanroom with a person in a white cleansuit standing at the bottom of the lens that rises about five feet above the person's head
Travis Lange, the deputy project manager of the LSST, shone a flashlight into the LSST Camera, which has a 5-foot-wide lens.

Jacqueline Ramseyer Orrell/SLAC National Accelerator Laboratory

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