matthen: “ For any triangle, you can draw a circle that fits perfectly inside (the incircle) and also one that connects all its corners (the circumcircle). This shows the path of the centre of the incircle, as a triangle is shuffled around its.
The age of the universe and its vast number of stars suggests that extraterrestrial life should be common. If that’s the case, then where is everyone? In this infographic we explore some possibilities.
Dark Energy Dark Matter The two largest pieces of the Universe that we know the least about, yet nothing less than the ultimate fate of the Universe will be determined by them. (Illustration: NASA/CXC/M.Weiss) The Universe in a Jelly Bean Jar