Acomet is a

meteoroid that travels through earth’s atmosphere and hits the surface.
meteoroid that burns up in earth’s atmosphere, producing a streak of light.
small, rocky object that orbits the sun and is usually found in a belt between the orbits of mars and jupiter.
small object made of ice and dust that orbits the sun and forms a coma as it approaches the sun.

A comet is a small object made of ice and dust that orbits the Sun and forms a coma as it approaches the Sun.

A comet is a small celestial body consisting mainly of ice, dust and gas in a (usually very eccentric) orbit around the sun and forming a coma, and sometimes having a tail of matter (gas and dust particles) blown back from it by the solar wind as it approaches the sun.

show me the image i cant tell