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

Both planets were destroyed, and—phoenix-like—were reborn anew as the Earth and Moon we know and love today. Another mystery to be resolved is the issue of what happened to the Earth’s water.

Scientists have found two Hot Jupiter type planets in two different systems that are very much alike. Understanding why these planets are so alike may open a door that can increase our ...

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 ...

Two planets can form around the same star and have very different organic inventories, and therefore predispositions to life." ...

Earth isn’t the only planet with seasons, but they can look wildly different on other worlds Nearby planets can affect how one planet ‘wobbles’ on its spin axis, which contributes to seasons.

Sometimes in science a negative result is just as important as a positive one. And sometimes data artifacts get the better of ...

Planets Form in Different Soups The new maps of the disks reveal that the chemicals in protoplanetary disks are not located uniformly throughout each disk; instead, each disk is a different ...