![]() ![]() Most meteors occur in Earth's mesosphere, about 50-80 kilometers (31-50 miles) above the Earth's surface. But the relative velocity between the two is still several tens of kilometres every second. Most meteors are travelling more slowly than the Earth as they orbit the Sun, so it is really the Earth travelling fast, the meteors more slowly. The comet that causes the Leonids is called Tempel-Tuttle. … Like planets or moons, comets orbit around the Sun. A very bright comet only appears once or twice in a century but it remains in the sky for many days or months. What moves very slowly across the sky?Ī comet is usually larger and travels slowly across the night sky. ![]()
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