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Asteroids are small, rocky objects that orbit the Sun. Most are irregularly shaped, although some are nearly spherical.
There are over a million known asteroids, and most can be found in the main asteroid belt between Mars and Jupiter.
Comets are large, icy bodies of frozen gases, dust, and rock, with a frozen nucleus. They orbit the Sun on highly elliptical paths. The distinctive tail is caused by the Sun tuning the ice into gas when they orbit close to the Sun.
Comets consist of four broad categories:
As comets or asteroids travel around the Sun, they leave behind a trail of debris in their wake.
When Earth's orbit intersects with this debris, thousands of bright trails appear to radiate from one point in the night sky.
Meteoroids are space rocks. They are fragments and debris from asteroids and comets.
These particles continue orbiting the Sun in approximately the same orbit as the parent body from which they came. Over time, they get further away from the parent as the orbit becomes littered with these particles.
When a meteoroid enters the Earth's atmosphere and burns up, it leaves a glowing trail in the sky and is known as a meteor - or, more popularly, a shooting star.
A firebal is when a meteor entering the atmosphere exceeds Venus in terms of brightness.
A large fireball will be visible for 5-10 seconds, and if you see a fireball that looks like it was close, be sure to listen out for a rumbling, or 'detonation' type sound. However, a fireball that lasts for more than 10 seconds is likely a satellite or some form of aircraft falling back to Earth.
Meteorites are meteoroids that survive the journey to Earth's surface. Meteorites fall every day. However, finding one is incredibly rare.
There are four broad types of meteorites:
Each of the known dwarf planets in the Solar System is smaller than our Moon. There are five recognised dwarf planets in our Solar System: Pluto, Ceres, Makemake, Haumea and Eris.
Unlike planets, dwarf planets are unable to clear their orbital path.
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