Astronomers have observed an object that originated from beyond our solar system, thought to be an interstellar comet, ...

Close stellar encounters could change the structure of our planetary system, potentially dooming Earth or other worlds to ...

Astronomers spotted an object speeding at 133,200 miles per hour (about 214,364 kilometres per hour), which is too fast to be ...

Astronomers have observed an object that originated from beyond our solar system, thought to be an interstellar comet, speeding through our celestial neighborhood.

Tracking the object’s orbit also reveals the path it has taken to reach our solar system, said Dr. Paul Chodas, director of NASA’s Center of Near-Earth Object Studies at NASA’s Jet ...

Tracking the object’s orbit also reveals the path it has taken to reach our solar system, said Dr. Paul Chodas, director of NASA’s Center of Near-Earth Object Studies at NASA’s Jet ...

“Objects bound to the sun — denizens of our solar system — take paths around it that return to the same point,” Kareta wrote in an email. “The Earth’s orbit is mostly circular, Pluto’s orbit is a ...

Astronomers manning an asteroid warning system caught a glimpse of a large, bright object zipping through the solar system ...

By Ashley Strickland, CNN (CNN) — A newly discovered object speeding through our solar system is sparking excitement among astronomers because it’s not from around here. Believed to be a comet ...

“The Earth’s orbit is mostly circular, Pluto’s orbit is a stretched oval, and many comets are very highly ‘eccentric’ — their orbits are very long and narrow ellipses.