Here is a great demo showing the difference between mass and rotational mass. Rotational mass depends not only on the mass, but where the mass is with respect to the axis of rotation. In this demo, ...

When you think of space missions, you might think of humans walking on the moon or rovers rolling around on Mars. But there's a whole bunch of other awesome space missions too. One of these events was ...

The rotation of stars in galaxies such as our Milky Way is puzzling. The orbital speeds of stars should decrease with their distance from the center of the galaxy, but in fact they all have the same ...