Astronomy and Physics Concepts

Front

All of space, time, matter, and energy that exists, including galaxies, stars, planets, and all forms of radiation.

Back

Universe

Front

A galaxy shaped like an elongated sphere with little gas or dust, mostly composed of older stars.

Back

Elliptical Galaxy

Front

A galaxy with a flat, rotating disk containing spiral arms, a central bulge, and a surrounding halo, like the Milky Way.

Back

Spiral Galaxy

Front

A galaxy without a distinct shape or structure, often chaotic in appearance.

Back

Irregular Galaxy

Front

A system of planets, moons, asteroids, comets, and other objects orbiting a central star, like the Sun.

Back

Solar System

Front

A natural satellite that orbits a planet.

Back

Moon

Front

A celestial body orbiting a star, large enough to be rounded by its own gravity and to have cleared its orbital path of debris.

Back

Planet

Front

A small, rocky object orbiting the Sun, mostly found in the asteroid belt between Mars and Jupiter.

Back

Asteroid

Front

A celestial object made of ice, dust, and rock that develops a glowing tail when it passes close to the Sun.

Back

Comet

Front

A region in space where gravity is so strong that not even light can escape.

Back

Black Hole