There is no evidence to support the idea that this interstellar object is anything but a comet, but let's double-check.

Might the solar system harbor not just one, but two unknown planets? A fresh study of the Kuiper Belt’s structure has revived ...

Tests on olivine hint that water-rich exoplanets could generate H2O internally, possibly explaining ocean worlds and even some of Earth’s early water.

On04, Osama bin Laden, in a videotape to the American people, said he ordered the Sept. 11, 2001, attacks on the United ...

Neptune Diner in Lancaster, Pennsylvania, is that rare celestial body in the restaurant universe – a gleaming, chrome-clad spaceship of deliciousness where breakfast isn’t just the most important meal ...

Scientists have discovered a rare six-planet system, HD 110067, where all planets orbit their star in perfect mathematical ...

Mercury currently appears as a bright "evening star" in the southwestern sky at sunset. Mercury will reach its greatest ...

A recently identified asteroid is capturing astronomers' attention with its frantic race around the Sun. Discovered under ...