How long is a light-year? Here are some ways to think about it.

Superman may fly faster than a speeding bullet, but he'd easily lose in a race against a beam of light, the fastest thing we ...
Noozhawk

Dennis Mammana: Why Astronomers Need Light-Years to Measure the Mind-Boggling Universe

We live in a world defined by inches, feet and miles (or centimeters, meters and kilometers, if you prefer), and it’s not difficult for most of us to comprehend sizes and distances given in these ...
Scientific American

Faster-Than-Light Galaxies Are a Fact of Life in Our Expanding Universe

If there is an absolute law in the universe, it’s that nothing can travel faster than the speed of light. For science-fiction enthusiasts, that’s a bit depressing. Space is big, and while the speed of ...
IFLScience

If The Visible Universe Is 13.7 Billion Years Old, How Is It 93 Billion Light-Years Across?

Alfredo has a PhD in Astrophysics and a Master's in Quantum Fields and Fundamental Forces from Imperial College London.View full profile Alfredo has a PhD in Astrophysics and a Master's in Quantum ...
Mashable

How long is a light-year? Here are some ways to think about it.

This jet streaming out of a supermassive black hole is traveling at nearly the speed of light. Credit: NASA / JPL-Caltech illustration Superman may fly faster than a speeding bullet, but he'd easily ...