Fun+Facts

A: 9,454,254,955,000 Kilometers. A: 299 792 458 m / s (still not fast enough to escape a black hole) A: There are 206 bones in the adult human body and 300 in children (as they grow some of the bones fuse together. __ Facts About Supernovas __
 * Q**: **How far is a light year?**
 * Q: how fast does light travel? **
 * Q: How many bones are there in the human body?**
 * In 1987 there was a supernova explosion in the Large Magellanic Cloud, a companion galaxy to the Milky Way
 * Supernovas produce Gamma rays!!
 * The explosion blows away the stars matter at 10% of the speed of sound

Scientists believe that we can only see about 5% of the matter in the Universe. The rest is made up of invisible matter (called Dark Matter) and a mysterious form of energy known as Dark Energy. Neutron stars are so dense; that a soup can full of neutron star material would have more mass than the Moon. The Sun produces so much energy, that every second the core releases the equivalent of 100 billion nuclear bombs. Black Holes are so dense, and produce such intense gravity, that even light cannot escape. Theoretical physicists predict that there is a situation under which light can escape (which is called Hawking radiation). Light from distant stars and galaxies takes so long to reach us that we are actually seeing objects as they appeared hundreds, thousands or even millions of years ago. So, as we look up at the sky, we are really looking back in time. The Crab Nebula was produced by a supernova explosion in 1054 A.D. The Chinese and Arab astronomers at the time noted that the explosion was so bright, that it was visible during the day, and lit up the night sky for months. Shooting stars are usually just tiny dust particles falling through our atmosphere. Comets sometimes pass through Earth’s orbit, leaving trails of dust behind. Then as Earth plows through the dust in its path, the particles heat up, creating the streaks in the night sky. Even though Mercury is the closest planet to the Sun, temperatures can reach -280 degrees F. Why? Since Mercury has almost no atmosphere, there is nothing to trap heat near the surface. So, the dark side of Mercury (the side facing away from the Sun) is very cold. Venus is considerably hotter than Mercury, even though it is further away from the Sun. The thickness of Venus’ atmosphere traps heat near the surface of the planet.

FAIL: After the tragedy of challenger the next space mission was also a fail Over 1000000 earths can fit into the sun Halley’s Comet was last seen in the inner Solar System in 1986, it will be visible again from Earth sometime in 2061 Many scientists believe that an asteroid impact caused the extinction of the dinosaurs around 65 million years ago The Moon appears to have more craters and scars than Earth because it has a lot less natural activity going on, the Earth is constantly reforming its surface through earthquakes, erosion, rain, wind and plants growing on the surface, while the moon has very little weather to alter its appearance Footprints and tyre tracks left behind by astronauts on the moon will stay there forever as there is no wind to blow them away. In 2006, astronomers changed the definition of a planet.

=The Sun looks 1600 times fainter from Pluto than it does from the Earth. = =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. =

**Human thigh bones are stronger than concrete.**