“What?” NASA astronaut Peggy Whitson exclaimed after her fellow Shane Kimbrough radioed her saying, “Peggy, I don’t have a shield.” It was Thursday, March 30, 2017, and Whitson was tethered to the ...

Astronomers have detected an Earth-size planet candidate orbiting a nearby star once a year, making it a promising target for ...

AUSTIN (KXAN) — The Earth is getting darker; the planet itself, when viewed from space, appears darker than it did in the past. The upper half actually appears to be getting darker than the bottom ...

The view of Earth from space is famously familiar—bright blue ocean, swirling gyres of white clouds, touches of terrestrial green. The luminosity of this image is the result of the sun’s rays shining ...

Finding Earth-like planets orbiting sun-like stars and identifying signs of life such as oxygen or water is a major goal in ...