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

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

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

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

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 ...

A Full Flower Moon shines in the sky tonight from sunset to sunrise. This month's Full Moon appears smaller than usual, just ...

In this episode, Astronomy magazine Editor Dave Eicher invites you to head out and observe a planetary nebula in the ...

Of the more than 5,000 exoplanets that have been confirmed so far and many more thousands of candidates, most orbit stars the ...

Jupiter’s moon Callisto passes near the planet’s northern limb, shortly before Io transits and Ganymede emerges from the gas ...

Vesta’s classification has vexed astronomers for decades, but a recent study is forcing planetary scientists to reevaluate ...