12 Diagrams That Changed How We Understood Our Solar System

These days, we are treated to glorious images of the cosmos through astrophotography and sophisticated three-dimensional visualizations of the universe. In the early centuries of astronomy, however, our visions of the cosmos often took the shape of diagrams—representing what we believed about our solar system. » 3/18/14 10:00am 3/18/14 10:00am

Here's the supernova Johannes Kepler studied 400 years ago

These are the remnants of the last supernova known to explode in our galaxy whose light has reached Earth. It lit up the night sky in 1604 and attracted the attention of Johannes Kepler himself. But it's only in the last couple of decades that we've developed the technology to understand exactly what kind of supernova… » 5/19/13 11:30am 5/19/13 11:30am