a streak of light in the sky caused by a meteoroid crashing through Earth's atmosphere
rocky or metallic objects that orbit the sun ranging in size from dust grains to small asteroids
a miniature representation of something
the force that attracts objects toward the center of the earth, or toward any other object having mass. Greater mass = greater gravitational force.
the points on the Earth's surface defining the axis of rotation of the Earth
gas planets that are furthest from the sun and beyond the asteroid belt-Jupiter, Saturn,Uranus, Neptune
an icy, small Solar System body that warms and begins to release gasses when passing close to the Sun
the period of time when a portion of Earth is facing the Sun
the period of time when a portion of Earth is facing away from the Sun
a region of icy objects beyond the orbit of Neptune. It is home to Pluto, most of the known dwarf planets, and comets.
a group of stars that forms a particular shape in the sky and has been given a name.
a straight line on which a planet rotates.
the Sun and everything that orbits, or travels around, the Sun. This includes the eight planets and their moons, dwarf planets, asteroids, and comets.
all existing matter and space as a whole; the cosmos.
a half of earth as divided into two halves by the equator
huge, glowing balls of gasses. The closest star to Earth is the Sun.
the action of making one complete turn on an axis or center (On Earth 1 rotation = 24 hours)