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.

Industry: Physics

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Astronomy

colliding galaxies

Physics; Astronomy

When two or more galaxies are close enough, their gravity begins to attract each one toward the other. The attraction increases as the galaxies travel even closer together. These galaxies can collide ...

compare chart or t-chart

Physics; Astronomy

A graphic organizer used to compare two objects or ideas. The objects are listed as headings at the top of two columns. The characteristics being compared are then listed under each heading. The ...

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 ...

disk

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 disk surrounds the bulge in a spiral galaxy. The ...

edge-on spiral galaxy

Physics; Astronomy

A spiral galaxy viewed from the side so that the disk 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 ...