Meteoroid, Asteroid, Comet

• Meteors are floating pieces of stone and metal that move about in space, with no own orbit, and are very small compared to asteroids and comets, ranging from 10 micrometer to 1 meter.
• Meteors are made up of stones and metals such as iron and nickel, and their surface temperature in outer space is about 0 degrees Celsius.
• Asteroids are large metal and rocky bodies that travel around the sun in their own orbit, made up of stones and metals such as iron and nickel, and have a cold surface temperature of about negative 73 degrees Celsius.
• Asteroids can have sizes from one meter to a thousand kilometers, and some of the largest asteroids are named after Palace, Juno, and Vesta.
• Comets are very small bodies made up of a mixture of ice, gas, and frozen dust, with their own orbit and traveling around the sun, and have a cold surface temperature of about negative 73 degrees Celsius.
• Comets have a long tail that can reach up to 150 million kilometers and a large head that can reach up to 250,000 kilometers, and are made up of gas and water that freeze into ice, dust, and rocky particles.
• Comets travel around the sun in an elliptical orbit at speeds from about 10 kilometer per second to 70 kilometer per second.