Guide to Space
How Far is Earth from the Sun?
It’s amazing to think that for the majority of human history, we had almost no understanding about the Sun. We didn’t…
How Many Satellites are in Space?
The space age began on October 4, 1957 with the launch of the first artificial satellite, Sputnik 1. This tiny…
Why is Mars Red?
Another name for Mars is the Red Planet, and if you’ve ever seen it in the sky when the planet…
How Will the Universe End?
The evidence that the Universe began with the Big Bang is very compelling. 13.8 billion years ago, the entire Universe…
Where Did the Earth’s Water Come From?
This question comes from Andrew Bumford and Steven Stormont. In a previous episode I’ve talked about how the entire Solar…
What is a Space Elevator?
https://www.youtube.com/watch?v=JGtqB5KMS1I Almost every part of a rocket is destroyed during the launch and re-entry into the Earth’s atmosphere. This makes…
What Color is the Sun?
Ask anyone, “what color is the Sun”? and they’ll tell you the obvious answer: it’s yellow. But is it really?…
What are the Phases of the Moon?
Everyone knows that the Moon goes through phases, but let’s talk about why it does. It comes down to illumination,…
How Long Will Life Survive on Earth?
Life has existed on Earth for billions of years, appearing shortly after the planet had cooled and liquid water became…
How Do Black Holes Form?
Black holes are the most exotic and awe inspiring objects in the Universe. Take the mass of an entire star.…