Science

The path of an object in space as it moves around another object due to gravity

The Sun and its family of orbiting planets and moons and other objects.

Millions and billions of stars held together in a group by their own gravity.

Space and all the matter and energy in it.

Space and all the matter and energy in it.

A round pit left behind on the surface of a planet after a smaller object strikes the surface

An imaginary line about which a turning body such as Earth rotates

The motion of one body around another, such as the Earth in its orbit around the Sun

One of a pattern of temperature changes and other weather trends over the course of a year

In an orbit, a position and time in which sun shines equally on both hemispheres.

In an orbit, a position and time during which one hemisphere receives the maximum sunlight

A large dark plain of solidified lava on the moon.

An event during which one object in space casts a shadow onto another

The dark central region of a shadow such as the cone of complete shadow cast by an object

A region of lighter shadow that may surround a dark central region.

Average distance from the sun which is 93,000,000 miles

An oval or flattened circle.

A planet that has a rocky surface.

A large planet that consists mostly of gases in a dense form

A small solid rocky body that orbits the Sun.

A body that produces a coma of gas and dust, a small icy body that orbits the Sun

A brief streak of light produced by a particle entering Earth’s atmosphere at high speed.

A small object from outer space that passes through Earth’s atmosphere and reaches the surface.

Earth-centered theory of the solar system.