We can observe an asteroid by observing them through a radar. The radar can reveal its size, shape, and whether it is two objects.

• If an asteroid crashes through Earth's surface, it is then called a meteorite.
• For an asteroid to cause a global panic it has to be more than a quarter-mile wide, an impact from an asteroid this size would cause dust to raise into the atmosphere and thus creating a "nuclea...

The different types of asteroids are:

• Asteroids are rocks which revolve around the sun. They are usually too small to be considered as a planet since they can be as small as 2 meters but they can be as big as 940 kilometers across.
• Asteroids are also known as planetoids or minor planets

• 1991 - NASA's Galileo was able to take close-up images of asteroids
• 1994 - Discovered the first moon to orbit an asteroid
• 2001 - Landed a spacecrafts successfully on Near-Earth Asteroid Eros
• 2006

• In 1801, Giuseppe Piazzi discovered the first and largest asteroid, Ceres, orbiting between Mars and Jupiter (Today it is classified as both an asteroid and a dwarf planet)
• In 1802, William...

Asteroids are what's left after the formation of our solar system from billions of years ago.