A solar eclipse is a rare and spectacular celestial event in which the Moon passes directly between the Earth and the Sun, blocking part or all of the Sun's light.

The second, Comet 2I/Borisov, was spotted by amateur astronomer Gennady Borisov of Crimea on Aug. 30, 2019. It streaked through our solar system at 110,000 mph, according to NASA, and behaved more ...

A rare and massive comet with a devilish nickname is set to pass by Earth for the first time in 71 years and may be visible during the highly anticipated April 8 total solar eclipse, according to ...

Our new results provide the strongest evidence yet that at least some Halley-type comets carried water with the same isotopic ...

A diagram shows the trajectory of interstellar Comet 3I/ATLAS as it passes through the solar system. It will make its closest approach to the sun in October. Late in the evening on July 1, a ...

This diagram shows the hyperbolic trajectory of interstellar comet 3I/ATLAS as it passes through the inner solar system. It will make its closest approach to the Sun, just inside the orbit of Mars ...

The new interstellar comet's official name is 3I/ATLAS. It's officially the third known interstellar object to pass through our solar system, and it poses no threat to Earth.

New comet 3I/ATLAS is just a dot in this 2-hour, 20-minute time exposure made with a 12-inch telescope on July 4. As it gets closer to the sun, the comet is expected to brighten, grow a tail and ...

Just the third-ever confirmed interstellar object has been detected in our solar system. Here's what we know. (Spoiler: It's not aliens.) The interstellar comet, originally called A11pl3Z and now ...