Have you ever wondered what our solar system looked like 3.8 billion years ago? Were the planets we know today anything like ...

NASA has discovered the interstellar comet 3I/Atlas, located 4.5 au from the Sun, offering a rare glimpse into celestial ...

NASA telescopes in Chile have discovered a comet from interstellar space, making its closest approach in October.

An "interstellar object" is speeding toward the inner solar system, where Earth is located, astronomers have confirmed.