What was originally thought to be a planet orbiting the Fomalhaut star was probably just the fallout of a wild collision.

Leonardo Testi and team investigate the initial conditions for planet formation in this special astronomy focus ...

The most striking claim about 3I/ATLAS is its estimated age range of 8-14 billion years. This analysis, led by Michele ...

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.

New calculations reported by Live Science indicate Jupiter was once much larger and is still contracting as it cools, offering constraints on early solar system conditions.

Around the bright star Fomalhaut, astronomers spotted glowing clouds of debris left behind by colossal collisions between ...

Mercury has long baffled astronomers because it defies much of what we know about planet formation. A new space mission ...

One of the biggest recent surprises in astronomy is the discovery that most stars like the Sun harbor a planet between the ...

Out in the depths of space, somewhere in between Mars and Jupiter, is a newly discovered asteroid that's breaking records.

Astronomers at Princeton University have uncovered evidence that the outer solar system is more structured than long believed ...

Key takeawaysPlanets larger than Earth but smaller than Neptune are the most common kind in the galaxy, but because our solar ...

When astronomers look deep into the early universe, the expectation is simple. You should see young galaxies still assembling ...