Astronomers Discover Planet Orbiting Nearest Single Star to the Sun

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An artist's impression of the exoplanet orbit Barnard's star.

The Search for Alien Life Just Hit a Depressing Setback

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Artist's rendition of a Red Dwarf emitting solar flares

NASA Explains Why We May Not See Aliens (Yet)

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An artist's concept of an exoplanet (left) that collects power from solar cells in orbit (right).

Astronomers Push to Redefine ‘Planet’—but Pluto Is Still Left Out

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The definition of planet is now being contested, though it means nothing for Pluto, shown above.

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

Tech Insider
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

NASA scientists think some planets are shrinking because powerful radiation from their cores is pushing away their atmospheres

Tech Insider
illustration colorful planets lined up in a long trail receding into distant space
An artist's concept shows the variety of rocky, Earth-like planets that might exist across the universe.

NASA/JPL-Caltech/R. Hurt (SSC-Caltech)

Mysterious flying objects across the US probably aren't aliens, but experts believe life is out there. Here are 13 reasons why we haven't made contact yet.

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Parkes Radio Telescope
A SETI radio telescope.

Ian Waldie/Getty Images

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