Astronomy

Astronomy

Of or pertaining to the study of celestial objects. This includes the physics, chemistry, and evolution of moons, planets, stars, galaxies, and any phenomena that takes place outside the atmosphere of Earth.

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Astronomy

Astrophysics

Physics; Astronomy

Study of the physical properties of objects in space.

Irregular galaxy

Physics; Astronomy

A galaxy whose shape is neither elliptical nor spiral. It is often rich in interstellar matter (gas and dust).

Constellations

Physics; Astronomy

“Pictures” in the sky that ancient astronomers perceived by imagining lines or relations between stars that appear grouped. Often, mythological heroes or creatures were the subjects of the ...

Disc

Physics; Astronomy

A pancake-shaped structure composed primarily of young and middle-aged stars, and having abundant gas and dust. Some old stars are also present. The disc surrounds the bulge in a spiral galaxy. The ...

Edge-on spiral galaxy

Physics; Astronomy

A spiral galaxy viewed from the side so that the disc containing the spiral arms appears to be a thin line of stars and dust crossing and extending beyond the bulge. Stars in the halo also may be ...

Elliptical galaxy

Physics; Astronomy

A galaxy having an elliptical shape. Some elliptical galaxies are nearly spherical, while others are more oblate, resembling footballs. An elliptical galaxy is essentially a big bulge composed mostly ...