But it’s not just looks. Rocky composition, general size, orbital behaviors—a lot of those qualities can be the same on both ...

Want to spot up to six planets at once in the night sky? Look up before dawn for the second and last "planet parade" of the ...

The Clone Wars introduced many new planets to the galaxy and also made well-known planets even more notable, but some are more important than others.

"What If is an epic exploration of possibilities. What If is a Webby Award-winning science web series that takes you on a journey through hypothetical worlds and possibilities, some in distant ...

Twin Planets: The Same, But Very Different 5 minute read This artist rendition provided by NASA shows the Kepler space telescope.

Studying the orbits of thousands of exoplanets shows that large planets tend to have elliptical orbits, while smaller planets tend to have more circular orbits. This split coincides with several ...

Though the planets are always “aligned,” seeing more than four in the sky is more uncommon. February’s lineup is a chance to glimpse all seven in one sweeping view.

The alignment of planets for a parade happens because of the orbits of the planets in our solar system. Each planet orbits the Sun at a different distance and speed, but they all follow known paths.