Is a sun a star or a planet? While science now agrees the sun is a star, new telescopes may soon challenge how we define ...

What is the difference between a moon and a planet? Trick question! According to scientific definitions, there often isn’t much of a difference at all. That might seem counterintuitive, but it’s true.

Using NASA's Transiting Exoplanet Survey Satellite (TESS), astronomers have discovered that aging stars in their so-called ...

If you do check out Jupiter with a small telescope on Sunday night, you'll see all four Galilean moons, with Ganymede and Io on one side of Jupiter and Europa and Callisto on the other. The ...

Is the moon a star or a planet? The correct answer is "neither," but that's not the consensus reached when the argument comes up in this funny TV clip. During a recent show for the QVC shopping ...

A conjunction is an astronomical event in which at least two planets – or, in this case, other celestial bodies – appear to our vantage from Earth to be close together in the sky. The trio of ...

Wondering if it's a full moon tonight or if the planet Venus and Regulus star will be visible again today? Here's what to know about this weekend's celestial events. Tonight's waning crescent moon ...