Add Yahoo as a preferred source to see more of our stories on Google. This video takes viewers on a long journey from the diminutive Speck of Horton Hears a Who (diameter 0.9 mm) all the way up to the ...

There’s something about comparing the sizes of unthinkably large objects that’s endlessly intriguing. Looking at a comparison of all the various sizes of stars in the universe, for example, makes for ...

Astronomers have detected an Earth-size planet candidate orbiting a nearby star once a year, making it a promising target for ...

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, ...