Want to know how the Millennium Falcon compares in size to an Imperial Star Destroyer? Just watch a Star Wars movie. But if you want to know how that hunk of junk compares to the Battlestar Galactica, ...

During its 4.5-billion-year life span, Earth’s been hit by countless asteroids. (Despite Jupiter’s noble attempts at defending it.) But while it’s easy to imagine the damage they’ve done, just how big ...

Although many of us find it insulting to go watch a movie or play a game that inaccurately depicts tiny plane-like spacecraft with artificial gravity or giant vessels passing by with a huge noise in ...

Size matters. Especially when it comes to starships, giant monsters, buildings, and . . . well, pretty much anything else that you can obsessively categorize using common measurement systems. Here are ...

If you want to feel small and get a sense for the awesomely overwhelming scale of the universe and all of its planets and stars and empty space, watch this star size comparison video. It starts with ...

I've been meaning to let y'all know about this: a while back I wrote how Emily Lakdawalla of the Planetary Society blog put together a scaled asteroid/comet size comparison chart. Well, she's updated ...

Astronomers studying extreme planetary systems have identified worlds so massive that they rival the smallest stars in size. These giant planets blur the line between planetary and stellar ...

Scientists using NASA’s Kepler, a space telescope, recently discovered six planets made of a mix of rock and gases orbiting a single sun-like star, known as Kepler-11, which is located approximately 2 ...

What would it look like if you put nearly every famous science fiction spaceship next to one another? This image. Artist Dirk Loechel has created a size comparison for dozens of ships. From Halo to ...

Earth, a vibrant ocean world with breathable air, active tectonics, and a protective magnetic field, uniquely creates the perfect habitable environment for sustaining diverse life. Earth and Mars have ...