“Whether it is real or not, it is 100 percent NOT Planet Nine,” Brown says. “Planet Nine is a prediction based on inferred ...

An aerospace engineer explains why NASA, Space Force and other agencies are using or testing aerobraking for more ...

The solar system's smallest planet is quickly approaching superior conjunction, so catch it in the morning sky while you can.

Debris from the 50 year-old probe Cosmos 482 crash-landed into the Indian Ocean over the weekend.

It really depends on the higher levels of our atmosphere, but a lower dew point is a better starting point for good observing ...

The Ursa Minor Dwarf is a small galaxy, a loose aggregation of stars, and a satellite of the Milky Way. Its gravitational ...