Why does a comet make a bright trail in the night sky? 1.A comet is made of ice, dust and gas that vaporize as the comet moves closer to the sun, leaving a trail.

2. A comet is made of ice, dust and gas that vaporize as the comet moves closer to the sun, leaving a trail.

3. A comet gives off light because of the mineral composition of the rocks from which the comet is formed.

4. A comet produces an optical illusion of a bright trail due to the layers of Earth’s atmosphere.

5. A comet is made of rock, which burns and lights up as the comet moves faster in the atmosphere.