Meteorites are abundant in the solar system. They can come in clouds or swarms that circle the sun. The can contain the dust and debris of old comets and reamains of impacts with moons and planets that bounced into the sky. Many are traced back to the moon and Mars.	A meteorite.
...another one.	Most of them burn up completely at an altitude of about 100 to 80 km. The light we see is not the glowing particle itself. The friction with air at their speed of 15 to 70 km a second causes them to glow so intensely that the act as a strong light emitting object. So they appear bigger than they are.
	and yet another.