Infinity-Science

X-Rays cannot reach the earth's atmosphere, so astronomers can only detect them using space telescopes such as ROSAT. @LAQMC

Sirius is the brightest star. Sirius is also referred to as the dog star. It is apart of the Canis Major constellation. Another star apart of the Canis Major constellation is the VY Canis Majoris. The VY Canis Majoris is the largest star. @LAQMC

It takes Saturn exactly 29.46 years to travel once around the Sun. @LAQMC

Saturn's rings are only about a few hundred million years old. @LAQMC

Jupiter spins right round in less than 10 hours which means that the planet's surface is moving at nearly 50,000 km/hr. @LAQMC

The Sun travels at a speed of 250km (155 miles) per second, but it still takes 230 million years for it to complete a single revolution of the galaxy. @LAQMC

There is a supermassive black hole right in the middle of the Milky Way galaxy that is 4 million times the mass of the Sun. @LAQMC

The oldest galaxies we can see are right next door to us in the present universe. Looking out into space, we see images of galaxies that become younger and younger the further out we look. We actually see images of the youngest galaxies in the universe the farther out we look. @LAQMC

There are probably more than 100 billion galaxies in the observable universe. Galaxies come in three main types: ellipticals, spirals, and irregulars. @LAQMC

All the moons of the Solar System are named after Greek and Roman mythology, except the moons of Uranus, which are named after Shakespearean characters. @LAQMC

In the last stage of their life, these massive stars have enormous density, for instance one teaspoon of white dwarf material is estimated to weigh more than a ton. @LAQMC

Dark matter is an mysterious energy that contains most of the Universe's mass. This concept was used for the first time by Fritz Zwicky in 1933. @LAQMC

The evening star is actually a planet, usually Mercury or Venus, when seen in the western sky just after sunset. @LAQMC

Giant stars have burned all their hydrogen, and so burn helium, fusing helium atoms to make carbon. @LAQMC

Earth's atmosphere was formed from gases pouring out from volcanoes. @LAQMC