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

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

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

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

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