June 30, 2016
  1. 108 years ago an asteroid crashed down near the Podkamennaya Tunguska River in Siberia.
  2. This impact is considered the largest impact in recent history.
  3. Every year on the anniversary of this day (June 30th) researchers all over the world get together to discuss asteroids and to prepare for future crashes.
  4. In celebration of astroid day, here are some asteroid facts!
    You can find more at space-facts.com
  5. Asteroids aren’t the only things that hit Earth. Each day, more than 100 tons of material from asteroids and comets falls toward Earth. Most of it is destroyed by friction as it passes through our atmosphere. If something DOES hit the ground, it is known as a meteorite.
  6. A car-sized meteoroid (a piece of asteroid) falls into Earth’s atmosphere about once a year. The result is a beautiful fireball, but the meteoroid usually burns up before reaching the ground.
  7. The best-known asteroids are 1 Ceres, which is 952 kilometres across, 2 Pallas (with a diameter of 544 kilometres), and 4 Vesta (roughly 580 km across).
    These are rocky minor planets, and astronomers have observed them since the 1800s. Ceres is a differentiated asteroid. That means it has a rocky core and a icy outer crust. It might have an internal ocean. Pallas has a very irregular shape, and may be what’s left of an early protoplanet. Vesta is very bright and is likely the leftover of a rocky protoplanet.
  8. The solar system contains many different types of asteroids, grouped by the minerals they contain. The abundances of precious metals such as nickel, iron, and titanium (to name a few), and water make asteroids an attractive target for mining operations when humans decide to expand their presence through interplanetary space.
    Beginning 2013, companies interested in asteroid mining began announcing their plans for future operations on distant planetoids. In addition, NASA is looking into similar missions. The biggest obstacles to asteroid mining are the need to develop affordable spaceflight technology that would allow humans to get to the asteroids of interest.