Why do meteorites appear only at night?
Simply, they dont. They are just more visible at night than during daylight hours. Just as the stars are still there in the daytime you cant see them because of the light level of the sun in the atmosphere is greater than that of the stars. We get the same number of meteors in the daytime as we do at night. Many smaller meteors just dont burn bright enough to be visible in the daytime sky. A meteor is in the sky, a meteorite is a meteor that has made it to the Earths surface. See the related link for more details.
