A proposed five-satellite Cosmic Positioning System could measure cosmic distances directly and help address discrepancies in the Hubble constant through solar system–scale triangulation.

Seraphim Space announced Feb. 25 it has completed fundraising for its second private early-stage venture fund, after exceeding its $100 million target to back young space technology startups.

Astronomy does not belong off Earth. It belongs wherever the universe can be observed — and that necessarily includes the surface of the planet humans live on. Kelsey Johnson: Past President of the ...

Water ice on Mars, bubbling gas on a distant star, a snow-covered island, and a pre-planetary nebula are featured this week. Plus, a look back at an image of Mars taken by the Dawn spacecraft during a ...

In the 1980s, sensors used to produce high-quality images for space science (including the amazing images from NASA’s Hubble Space Telescope) and other applications employed charge coupled device (CCD ...

Rocket Lab will launch a scramjet-powered hypersonic vehicle for the U.S. military today (Feb. 25), and you can watch the liftoff live.