Spider - Description. 1  1: pedipalp 2: trichobothria 3: carapace of prosoma (cephalothorax) 2  15: sternum of prosoma 16: pedicel (also called pedicle) 3  Spiders are chelicerates and therefore arthropods. 4  Spiders and scorpions are members of one chelicerate group, the arachnids.
See also: Meteoroid and Meteor. A meteorite is a solid piece of debris from an object, such as a comet, asteroid, or meteoroid, that originates in outer space and survives its passage through the Earth's atmosphere and impact with the Earth's surface.
A meteor is the visible trail of light made by a meteoroid that enters the Earth's atmosphere, and then either burns up, explodes (bolides), or hits the surface on land or at sea. Meteors can have several different compositions, containing various stony, glassy, or metallic materials. (sometimes called a shooting or falling star).