NPR's Ari Shapiro talks with astronomer David Jewitt about what we can learn from the third interstellar object to have entered our solar system, a comet-like object known as 3I/ATLAS.

“They happen to be very close to each other in the sky right now,” he says. “The closest approach was actually this (Tuesday) ...

3I/ATLAS was discovered by NASA's Asteroid Terrestrial-impact Last Alert System (ATLAS) on 1 July, and is just the third ...

On the subject of Comet 3I's unnaturalness, Harvard physicist Avi Loeb has admitted to having concerns about the discovery in ...