A mysterious visitor from another solar system could be an alien spacecraft, according to a leading Harvard astronomer.

This diagram shows the hyperbolic trajectory of interstellar comet 3I/ATLAS as it passes through the inner solar system. It will make its closest approach to the Sun, just inside the orbit of Mars ...

A new Tatooine-like planet outside the solar system may orbit two failed stars, scientists reported Wednesday. Located about 120 light years away, the exoplanet appears to take an unusual path ...

Just the third-ever confirmed interstellar object has been detected in our solar system. Here's what we know. (Spoiler: It's not aliens.) The interstellar comet, originally called A11pl3Z and now ...

Backward, or retrograde, orbits are known to exist in our solar system. Triton, the largest moon of Neptune, orbits in the opposite direction to the planet's rotation. Many of the small moons of ...

A new Tatooine-like planet outside the solar system may orbit two failed stars, scientists reported Wednesday. Located about 120 light years away, the exoplanet appears to take an unusual path ...

A new Tatooine-like planet outside the solar system may orbit two failed stars, scientists reported Wednesday. Located about 120 light years away, the exoplanet appears to take an unusual path ...

Tatooine-like planet outside the solar system may orbit two failed stars, scientists say By: Adithi Ramakrishnan, The Associated Press Posted: 1:02 PM CDT Wednesday, Apr. 16, 2025 Last Modified: 2 ...