This is a gorgeous image of a sunset over Dione (pronounced die-OH-nee). Dione is one of Saturn’s moons and is the 15th largest moon in the solar system. If you combine all the smaller moons together it would still not be bigger than Dione. It has a 1:2 orbital mean resonance with Enceladus which means that for every orbit Dione completes (2.7 Earth days), Enceladus will have completed 2 by then. Dione is mostly made up of ice and has a diameter of 1122 km. It is also the third densest Saturnian moon and has the distance of 377,000 km from Saturn (or about the same distance from the Earth to the Moon). An interesting observation of Dione is that it’s front side is facing all the debris that it plows through but it’s backside actually has MORE impacts than its front side. Scientists have speculated that an impact could have spun the moon around 180 degrees...

What is a Kilonova?   NASA astronomers have found an intense cosmic event called a “kilonova.” A kilonova is an explosion so powerful that it’s 1000 times stronger than a normal supernova. To help put this in some perspective think about this. The amount of energy a Sun (like the size of our own) produces in its 10 billion life time equals to the amount of energy an average supernova produces. Still not helping? Well think about the amount of energy of the atomic bomb Little Boy outputs (the one dropped on Hiroshima) which is 15 kilotons (6 x 1013 joules) of TNT. During the cold war the United States developed a hydrogen bomb with a max theoretical yield of 25 megatons or 1015 joules. To equal that of a supernova you would need about 10 trillion of the most destructive hydrogen bombs. Now that your brain is barely hanging on let’s move away from the...