Solar sailing has moved from science fiction concept to working hardware, and now a new generation of entrepreneurs wants to ...

Satellite breakups and anti-satellite tests have created an alarming amount of debris, a crisis now exacerbated by the rapid expansion of commercial constellations such as SpaceX’s Starlink. The ...

Critics argue the satellites, billed as a way to harness solar energy at night, could hamper sky observations and may pose a ...

John Casani spent more than half a century turning speculative ideas about distant worlds into working spacecraft that could survive the trip. His quiet influence at NASA’s Jet Propulsion Laboratory ...

For thirty years, SOHO has delivered an unprecedented, nearly unbroken view of the Sun, surviving multiple near-catastrophic ...