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.

A strange world just 47 light-years from Earth is rewriting what scientists thought they knew about alien planets. Hidden ...

It’s quite a challenge to make an Earth-like world. You need enough mass to hold an atmosphere and generate a good magnetic ...

Roughly 1,000 light-years away from Earth, a gigantic disk of gas and dust is swirling around a young star and giving rise to ...

The newly identified cluster of Kuiper Belt objects lies about 4 billion miles from the Sun, offering fresh clues about how ...

Xi Zhang, a professor of Earth and planetary science at UC Santa Cruz, has discovered that an exoplanet classed as a ...

Astronomers have uncovered a massive gas planet in a place it should never exist, orbiting one of the smallest stars in the ...

Long before humans walked the Earth, your solar system had a brush with two blazing blue stars that passed surprisingly close ...

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

The interstellar comet is on its way out of the solar system. Scientists studying it have observed its composition and ...

If nonliving materials can produce rich, organized mixtures of organic molecules, then the traditional signs we use to ...

Europa has a vast, saltwater ocean beneath its icy shell, with more than twice the amount of water in all of Earth’s oceans ...