The Universe
What are asteroids?
Asteroids are tiny heavenly bodies that move around the Sun. Most of them occur in the region between Mars and Jupiter. They are thought to be fragments left over from the formation of the solar system.
What is trajectory?
Trajectory is a general term for the path of any object moving in a force field such as a gravitational field that exerts a force on the object. Hence, the term trajectory can be applied to the path of space probe moving in a gravitational field.
What is an orbit?
When a small heavenly body moves around a larger one, the smaller body is said to orbit the larger one and the path followed by the smaller body is called its orbit around body. For example, the Earth orbits the Sun.
What are comets?
Comets are small heavenly bodies which orbit the Sun but regularly come close to the Sun. They are partially vaporized by the Sun’s heat and glow brightly for a short time when near the Sun. A comet consists of a central nucleus a few kilometers across and can be mixed with dust.
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