Harvard astrophysicist Avi Loeb has cowritten a research paper speculating whether the comet 3I/ATLAS is in fact "hostile" ...

The Perseid Meteor Shower is one of the brightest and most easily viewed meteor showers of the year, producing up to 100 ...

"We should put all possibilities on the table that it's a rock, a comet, or something else until we get the evidence, the ...

A Harvard astrophysicist has suggested that a newly discovered comet passing through our solar system might be an alien spacecraft in disguise. The claim by Professor Avi Loeb has split opinion in the ...

These discoveries illustrate NASA’s multifaceted exploration efforts in planetary science, astrophysics, lunar research, and ...

The strange 3I/ATLAS comet that was recently discovered to be speeding through our solar system could actually be the work of ...

"The consequences, should the hypothesis turn out to be correct, could potentially be dire for humanity," said Avi Loeb.

"It could represent some of the oldest and most pristine water ever observed, formed in another planetary system and ...

NASA has discovered an interstellar comet that's wandered into our backyard. The space agency spotted the object with the Atlas telescope in Chile earlier this week, and has confirmed it was a comet ...

NASA said the comet will make its closest approach to the sun in October, scooting between the orbits of Mars and Earth — but closer to the red planet than us at a safe 150 million miles away.

NASA's Voyager spacecrafts won't reach the inner Oort Cloud for another 300 years -- and it could take them 30,000 years to pass through it. But each comet that approaches the sun reveals more ...

The bright K2 comet — previously the farthest active comet ever spotted — approaches the Earth on July 13 and 14. Here's what it is and how to see it.