| http://www.w3.org/ns/prov#value | - Most meteors are no larger than a sand grain: pebble- and cobble-sized meteors, called ???fireballs,??? put on a much more impressive show, tumbling and shedding visible mass as they streak across the sky and are brighter than any object in the sky other than the sun or moon.A fireball meteorThe Perseids are so called because they seem to radiate from a point located in the constellation Perseus.
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