Add Yahoo as a preferred source to see more of our stories on Google. NASA released close-up images on Wednesday of the rare interstellar comet that's making a single pass through the solar system.

The sun warms the Earth, making it habitable for people and animals. But that's not all it does, and it affects a much larger area of space. The heliosphere, the area of space influenced by the sun, ...

Add Yahoo as a preferred source to see more of our stories on Google. A stray comet from another star swings past Earth this week in one last hurrah before racing back toward interstellar space.

Laser-sail experiments test a route to nearby stars, while research reveals major barriers to interstellar missions.

The highly anticipated moment for skywatchers is finally approaching as interstellar comet 3I/ATLAS prepares for its closest pass by Earth this December. The mysterious object famous for both ...

The Sun warms the Earth, making it habitable for people and animals. But that’s not all it does, and it affects a much larger area of space. The heliosphere, the area of space influenced by the Sun, ...