Portal Space Systems says it has successfully tested its solar thermal propulsion system at operational temperatures inside a ...

Voyager 1 has been exploring the cosmos for decades, but when it reached the edge of the solar system, it found something ...

Humanity’s drive to explore has taken us across the solar system, with astronaut boots, various landers and rovers’ wheels ...

Viewed from orbit, Jackass Flats — situated in southern Nevada about 65 miles northwest of Las Vegas — could easily be ...

Astronomers are abuzz with the discovery of a rogue planet, 2MASS J05325346+0919037, which is set to pass within 0.05 ...

The National Aeronautics and Space Administration has confirmed an interstellar object is passing through our solar system. The object is a comet hailing from the direction of the constellation ...

There are a couple of ways that scientists can date planets, so which planets formed first in our solar system?

The interstellar object hurtling toward the inner solar system, where Earth is located, is much larger than previously ...

IMAP (short for "Interstellar Mapping and Acceleration Probe") is the primary payload on today's flight. The roughly $600 ...

a bubble of plasma that flows outward from the sun and envelops the solar system. Like wind on Earth, the solar wind blows in ...

Interstellar comet 3I/ATLAS — just the third such object ever confirmed to have entered our solar system — flew past Mars ...

A discovery in V883 Orionis' planet-forming disk suggests Earth's water could have come from ancient interstellar ice that ...