escape velocity

The Challenges of an Alien Spaceflight Program: Escaping Super Earths and Red Dwarf Stars

According to two new papers submitted by a Harvard Professor and an independent scientists, extra-terrestrials might have a hard time…

3 years ago

Astronomy Cast Ep. 384: Escaping Probes

The gravity of the Earth is a tough thing to escape, but breaking free from the gravity of the Sun…

6 years ago

How Can Black Holes Shine?

We hear that black holes absorb all the light that falls into them. And yet, we hear of black holes…

6 years ago

Why Doesn’t The Sun Steal The Moon?

The Sun has so much more mass than the Earth. So, so, so much more mass. Almost everything in the…

7 years ago