The gym chain is inviting both members and non-members to exercise for free Saturday-Sunday, Feb. 14-15, at all locations in ...

Gas giants are large planets mostly composed of helium and/or hydrogen. Although these planets have dense cores, they don't ...

A newly identified planet candidate, HD 137010 b, looks strikingly Earth-like in size and orbit — but it may be colder than Mars due to its dimmer star. If it has a thick enough atmosphere, though, ...

Scientists have identified a rocky outer planet in a system where a gas giant was expected. The discovery challenges ...

The similarities are astonishing. And yet... The post NASA Telescope Discovers Nearby Planet With Deep Similarities to Earth ...

Here's what to know about the brief tenure of our solar system's smallest planet.

Mercury, Venus, Neptune, Saturn, Uranus and Jupiter will appear together shortly after sunset on Feb. 28 — but is this the "planet parade" we've been waiting for?

Six planets—including Venus, Jupiter, and Mercury—will line up in the sky. Here’s the best time to watch and where to find clear views.

Astronomers have uncovered a distant planetary system that flips a long-standing rule of planet formation on its head. Around the small red dwarf star LHS 1903, scientists expected to find rocky ...

In short: A new study, yet to be peer reviewed, builds on years of evidence suggesting a ninth planet exists in the Solar System. Despite this, researchers have not yet seen it directly using ...