There's an iconic scene in the original Star Wars where Mark Hamill's Luke Skywalker watches a double sunset above Tatooine, ...

Astronomers have discovered a brand-new class of exoplanet unlike anything previously known. This discovery, featured in ...

Even at a glance, the planets in our solar system are wildly diverse. Huge and small, airless and densely packed with ...

Extra-solar planets are among the most thrilling discoveries of our age. Just today, scientists using Spitzer space telescope data announced the first detection of infrared light from an extra-solar ...

So far, humanity has yet to find its first "exomoon"—a moon orbiting a planet outside of the solar system. But that hasn't been for lack of trying. According to a new paper by Thomas Winterhalder of ...

A stunning alignment of Mercury, Mars, Jupiter, Saturn, Uranus and Neptune will occur this summer in a phenomenon called the 'parade of planets' Skyler Caruso is a Writer and Reporter of PEOPLE ...

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

The Solar System has 8 planets, and each one is different. Earth has 5 oceans, thick air, forests, rivers, and more than 1.5 ...

Nearly all of the planets in the solar system are about to march through the night sky in a single-file line. This planetary alignment, sometimes called a planet parade, will include all of the solar ...

The Sun is an incandescent but benevolent dictator. For billions of years, it’s kept our star system well organized through the influence of its powerful gravity. All the planets revolve around it on ...