Plate tectonics give Earth its mountains, earthquakes, continental drift and maybe even helped give rise to life itself. But ...

January started out with a meteor shower and now has a planetary alignment in store. Here's what you'll be able to see and ...

Venus and Saturn will be in conjunction this weekend, appearing side by side in the night sky during January's post-sunset ...

Earth is the only planet we know of that has ever had a fire. While there may be volcanoes pushing out hot magma on the ...

New observational data from the James Webb Space Telescope and simulation models have confirmed a new type of planet unlike ...

Alignments of five or more planets are rare—there will be two more featuring five or more planets this year, but after that ...

These are the planets that will be visible with the naked eye. A rare parade of planets will light up the night sky ...

A six-planet alignment or parade will form an arc in the early night sky, peaking in it's visibility Jan. 17-18. We let you ...

Six planets will be in alignment this weekend, with four of them shining bright in one sweeping view. What to know about the planet parade.

The Red Planet will be at its closest point to Earth, also known as perigee, on Jan. 12 and will be exactly opposite the sun ...

At 8:07 p.m. Monday, stargazers in Chicago will see Mars disappear behind the moon and reappear on the other side of the moon ...

"Even if a planet is in the habitable zone, if it has too small a water inventory, it transitions to an uninhabitable state." ...