If Earth had the same diameter as the head of a pushpin, how much would all of the other celestial bodies in the universe need to shrink to scale proportionally? It’s a fun, ridiculous question and ...

Science fiction is fun because physics and lack of technology aren’t constraints. You can create any building or vehicle you can imagine, no matter how big or fast. Just as important, though is that ...

A neutron star is the densest object astronomers can observe directly, crushing half a million times Earth's mass into a sphere about 12 miles across, or similar in size to Manhattan Island, as shown ...

This illustration shows the average brown dwarf is much smaller than our sun and low mass stars and only slightly larger than the planet Jupiter. Disclaimer: AAAS and EurekAlert! are not responsible ...

What does a lead nucleus and a neutron star have in common? When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Scientists have made new estimates of ...

I first heard about the genre of “size comparison” videos on YouTube from this article in the New York Times, written by a mom whose seven-year-old son had become obsessed with them. He’s at a ...