Short-lived radioisotopes such as aluminum-26 influenced early solar system heat, water retention and the formation of Earth-like rocky planets, according to meteorite analyses and models.

From Viking to Perseverance, scientists have spent decades chasing chemical hints that could point to life beyond Earth.

Accurate estimation of the ionosphere is essential for reliable Global Navigation Satellite System (GNSS) positioning, timing ...

3I/ATLAS came within 168 million miles of Earth around midnight CST Friday. While that might seem pretty far away, the ...

Astrophysicists are mapping a vast, hidden structure in the gas around the Sun that behaves like a tunnel carved through ...

The cosmic object, originating from beyond our solar system, sparked curiosity reminiscent of a science-fiction spectacle, ...

Astrophysicists are mapping a vast, hidden structure in space that appears to guide matter and radiation along a kind of ...

When interstellar comet 3I/ATLAS made its closest approach to Earth on December 19, 2025, it did not become a spectacular object in the night ...

Is 3I/ATLAS a natural comet or an alien probe? Harvard's Avi Loeb explores the mystery of its sunward 'anti-tail' and what it ...

Hubble reveals a mysterious 'controlled' jet system on 3I/ATLAS. Is this 130,000mph interstellar visitor a natural comet or ...

Comet 3I/Atlas is just the third known object to visit us from outside our solar system. So yes... we'll be talking about aliens.

A new NASA study of data from its old Cassini mission to Saturn suggests that giant moon Titan may not have a global ocean — but that life could still exist in pockets.