Guide to Space
How Far is Mars from Earth?
This article was originally published on Aug 10, 2012. We've updated it and added this cool new video! Sending spacecraft…
How Does a Star Form?
We owe our entire existence to the Sun. Well, it and the other stars that came before. As they died,…
What is the Universe Expanding Into?
Come on, admit it, you've had this question. “Since astronomers know that the Universe is expanding, what’s it expanding into?…
Are There More Grains of Sand Than Stars?
This question comes from Sheldon Grimshaw. "I've heard that there are more stars in our Universe than there are grains…
What is a Pulsar?
They are what is known as the "lighthouses" of the universe - rotating neutron stars that emit a focused beam…
What Is The Evidence For The Big Bang?
Almost all astronomers agree on the theory of the Big Bang, that the entire Universe is spreading apart, with distant…
What is a Parsec?
If you're into astronomy, or just a fan of any science fiction franchise worth its salt, then chances are you've…
What Would Happen if the Earth Stopped Turning?
This article was originally written in 2010, but we've now updated it and added this spiffy new video. As you…
What is the Milky Way?
When you look up at the night sky, assuming conditions are just right, you might just catch a glimpse of…
What Is The Hottest Place on Earth?
We’ve talked about Venus, the hottest planet in the Solar System, but we know things can get pretty hot here…