a small rocky body orbiting the sun.
positioned in or relating to the sky, or outer space as observed in astronomy
a small, reddish planet that is the fourth in order from the sun and is periodically visible to the naked eye.
an artificial body placed in orbit around the earth or moon or another planet in order to collect information or for communication.
the void that exists between celestial bodies, including the Earth. It is not completely empty, but consists of a hard vacuum containing a low density of particles, predominantly a plasma of hydrogen and helium as well as electromagnetic radiation, magnetic fields, neutrinos, dust and cosmic rays.
the second planet from the sun in the solar system, the brightest celestial object after the sun and moon and frequently appearing in the twilight sky as the evening or morning star.
a group of stars forming a recognizable pattern that is traditionally named after its apparent form or identified with a mythological figure.
a celestial body moving in an elliptical orbit around a star.
the sixth planet from the sun in the solar system, circled by a system of broad, flat rings.
a small planet that is the closest to the sun in the solar system, sometimes visible to the naked eye just after sunset.
a celestial object consisting of a nucleus of ice and dust and, when near the sun, a “tail” of gas and dust particles pointing away from the sun.
the natural satellite of the earth, visible (chiefly at night) by reflected light from the sun.
the largest planet in the solar system, a gas giant that is the fifth in order from the sun and one of the brightest objects in the night sky.
a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.