The eyes of every astronomer widened this year when an interstellar traveler was discovered in our solar system.

The solar system lost its ninth planet back when Pluto was demoted to a dwarf planet, but research might indicate that there ...

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.

Is it an alien spaceship or an ancient comet? That’s the question puzzling UFO enthusiasts, NASA, and the European Space Agency since an interstellar visitor entered our solar system last month. It ...

Called 3I/ATLAS, the object is only the third of its kind known to astronomers, and it’s likely been heading our way for ...

If you're up to date on your Voyager news, you will know that the aging spacecraft are slowly saying goodbye to their instruments, as NASA tries to conserve power and get more science data out of the ...