The gym chain lost almost one-third of its value as the market digested its Q1 numbers.

Planet Fitness is battling through some self-inflicted issues in Q1 that have the market taking a "prove it" stance toward ...

Two decades ago, the International Astronomical Union—which defines and names celestial bodies—redefined the criteria for ...

The rusty world is full of mysteries—and some of the solar system's most extreme geology. Learn more about Earth's smaller, colder neighbor.

The head of NASA says maybe Pluto is a planet after all. He is wrong because Pluto is part of the rest of the solar system ...

Planet Fitness acknowledged marketing missteps and showed slower growth in the crucial first few months of the year Planet Fitness added about 700,000 members in the first quarter, fewer than in the ...

A new paper from NASA's Backyard Worlds: Planet 9 project announces that volunteers have essentially doubled the number of ...

There's so little we know about circumbinary planets—planets that orbit two stars instead of one—that they can feel like the stuff of fantasy. And for good reason: to date, we've only confirmed the ...

Epsilon Indi Ab was first discovered in 2002 and was officially confirmed to exist in 2018. It is considered an exoplanet, ...

Shares of Rocket Lab (NASDAQ:RKLB | RKLB Price Prediction) are up roughly 30% intraday on Friday afternoon, trading near $102 ...