From planets covered in burning ice to diamonds bigger than our entire planet, these are 25 things you didn't know about the Universe. https://twitter.com/list25 https://www.facebook.com/list25 http://list25.com/ Check out the text version too! - http://list25.com/25-things-you-didnt-know-about-the-universe/ Here's a preview: The sun makes up 99% of the mass of the solar system There is a planet called HD189733b where it rains glass sideways It takes a photon, on average, 170,000 years to travel from the core of the sun to the surface. Then it takes just 8 minutes from the sun's surface to your eyes. Far beyond Neptune, there may be an object the size of Earth orbiting the sun (look up Oort cloud) There's a gas cloud in the constellation of Aquila that contains enough alcohol to make 400 trillion trillion pints of beer. Dung beetles can use the Milky Way to navigate. 33 light years away there is an exoplanet completely covered in burning ice If you could compress the Earth down to the size of a marble it would collapse on itself and become a black hole About 275 million new stars are born everyday Olympus Mons, the largest mountain in the universe can be found on Mars. It is 3 times the height of Everest and it basically sticks out of Mars's atmosphere Its also so wide that if you were standing on the edge of its caldera, the base of the volcano would be over the horizon. The Milky Way has four spiral arms, not two. According to researchers, the center of our galaxy tastes like raspberries and smells like rum According to astronauts, space smells like seared steak, hot metal, and welding fumes