Physicist: When a rocket fires it increases its speed by some fixed amount called the “ΔV” (delta V). If the original speed is W, and the rocket speeds up by ΔV, then the change in ene…

This episode demonstrates and explains 'The Oberth Effect' and the extra efficiencies you can gain from doing some of your burns at the highest possible velo.

A diagram showing the stair-step energy needed to travel to places beyond the Earth. Delta-V is the velocity in km/sec to reach a destination. The Delta-Vs a accumulative. (Credit: Wikipedia, Delta-V)

Cuz Kerbals are fun. A newcomer to the stream. They find themselves in a strange new place with technology more advanced than anything they've ever seen.

So, March every year is Pi day. As in π not pie the delicious yummy treat. So, all the math geeks get their own day! But, March in the year 2015 will be super uber cool.

"To be fair, my job at NASA was working on robots and didn't actually involve any orbital mechanics. The small positive slope over that period is because it turns out that if you hang around at NASA, you get in a lot of conversations about space.

A great poster of Feathered Dinosaurs! Science suggests that modern-day birds evolved from these prehistoric reptiles. Check out the rest of our amazing selec