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Physics
The branch of science concerned with the properties of matter and energy and the relationships between them.
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Physics > Astronomy
spiral galaxy
Physics; Astronomy
A galaxy made up of a disk, spiral arms, and a bulge at its center. The size of the disk and the bulge vary. The galaxy is composed of a mixture of old and young stars, as well as ...
venn diagram
Physics; Astronomy
A diagram consisting of two or more overlapping circles. It is often used in mathematics to show relationships between sets. In other applications, Venn diagrams are useful for ...
yellow star
Physics; Astronomy
Stars that live for a medium length of time (about 10 billion years) and are neither extremely cool nor hot. Earth’s Sun is an example of a yellow star.
barred spiral galaxy
Physics; Astronomy
A type of spiral galaxy having a linear extension, or “bar,” made of stars and interstellar matter, passing through its center.
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