The interstellar comet 3I/ATLAS is now reaching its closest point to the sun, or perihelion, on Wednesday, according to NASA.

Astronomers are closely observing the interstellar comet 3I/ATLAS. This comet is not a threat to Earth. Its study will help ...

But as researchers have discovered more moonlike objects in our solar system—including 128 moons orbiting Saturn just this ...

Is 3I/ATLAS really an alien mothership? NASA and the scientific community weigh in on the controversial topic.

Despite the ongoing government shutdown, NASA did manage to complete a major milestone in its effort to send astronauts back ...