The first four humans to orbit over Earth's north and south poles have safely returned to Earth.

Turns out, it's as tough to drop inward into the inner solar system, as it is to head outward. The problem stems from losing momentum from a launch starting point on Earth. It can take missions ...

A team that includes aerospace engineers, historians and writers have proposed retrieving the 67-year-old Vanguard 1 satellite from orbit.

The Bay Sages heard from the Delta Astronomical Society (DAS) during its monthly meeting on Thursday. DAS Newsletter Editor ...

Portal Space Systems has raised $17.5 million to accelerate the development of a space vehicle with a solar thermal ...

British startup Pulsar Fusion has unveiled Sunbird, a space rocket concept designed to meet spacecraft in orbit, attach to ...

Flying Astrobee robots being tested on the ISS could give rise to incredible guardian spacecraft that protect the station ...

Aetherflux, the space solar startup founded by Baiju Bhatt, the billionaire co-founder of Robinhood, has raised $50 million ...

United Launch Alliance will send 27 Kuiper satellites into low Earth orbit as we begin a full-scale deployment of our ...

A Silicon Valley startup run by the billionaire co-founder of brokerage firm Robinhood Markets Inc. is receiving new funding ...

Each of the planets, labeled b, c, d, and e, has a mass between 20% and 30% of Earth's, making them among the smallest yet ...

What can a sample return mission from Jupiter's volcanic moon, Io, teach scientists about planetary and satellite (moon) ...