To wrap up the entire story in Revenge of the Savage Planet, you'll need to unlock all the planets; here’s how you can do so.

Our solar system may have a ninth planet after all, following the declassification of Pluto nearly two decades ago, ...

The only planet "out of the loop," so to speak, is Mercury, which is aligned too close to the sun to be seen all month. Related: Night sky, May 2025: What you can see tonight [maps] Read more ...

but it depends on where you're standing on the planet. At the equator, you'd be moving the fastest; at either the North or the South Pole, you would—surprisingly—not be moving at all.

Q: Why do the planets all orbit the Sun in the same plane? —Randi Eldevik | Stillwater, Oklahoma Because of the way the Sun formed, explains David DeVorkin, a senior curator in the space history ...

Championing sustainability by promoting nature nonprofits, increasing recyclability and reducing waste and emissions.