Have you ever wondered what you might see if you were able to travel to a black hole? What about a neutron star?

Robert Nemiroff of Michigan State University has put up a website that features computer-simulations of what one might see from the porthole of a spaceship traveling around one of these strange objects.

While black holes and neutron stars are very different objects, they are formed the same way: a star collapses in on itself until it is only a few kilometers in diameter. However, the full mass of the star remains, meaning that the material is extremely dense - a teaspoon would weigh as much as several aircraft carriers!