Two planets stand side by side as the evening twilight continues to delight and colorful stars shine in the sky this week.

As Earth approaches warmer levels experienced earlier in its geologic history, it may be bad news for human survival.

Mercury would have the worst Airbnb reviews due to extreme temperature swings, total lack of amenities, incredibly long days, odd gravity, and proximi ...

Venus is deemed the worst tourist destination due to its extreme heat, toxic atmosphere, crushing pressure, and ...

Astronomers for the first time have deciphered the three-dimensional structure of the atmosphere of a planet beyond our solar ...

It is so ferociously hot that the “exoplanet” features iron in the form of a gas in one layer of its atmosphere, while a jet ...

Astronomers for the first time have deciphered the three-dimensional structure of the atmosphere of a planet beyond our solar ...

Saturn, Venus, Neptune, Uranus, Jupiter, Mars and Mercury will be visible in an uncommon planetary alignment this month.

Right now, Mars is a reddish desert landscape – attractive but dead, and certainly not home to any little green men.

Last year, astronomers discovered an unusual Earth-size exoplanet they believe has a hemisphere of molten lava, with its ...

Feb. 18 marks the 95th anniversary of the discovery of our outermost planet-not-planet. Here's what to know about the short ...

At the very beginning of its history, Earth was dry. How did it become a blue planet? A new theory could provide an answer.