Understand the life cycles of stars and the structure of galaxies.
A massive ball of gas that produces light and heat through nuclear fusion
The galaxy that contains our solar system
The nearest star to Earth after the Sun
A large system of stars, gas, and dust bound together by gravity
The life cycle stage of a star when it expands and cools after using up its hydrogen
The process by which stars produce energy, involving fusion of hydrogen atoms
A galaxy characterized by a flat, rotating disk with a central bulge surrounded by spiral arms
A galaxy with an ellipsoid shape and a smooth, nearly featureless brightness profile
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A massive ball of gas that produces light and heat through nuclear fusion
Star
The galaxy that contains our solar system
Milky Way
The nearest star to Earth after the Sun
Proxima Centauri
A large system of stars, gas, and dust bound together by gravity
Galaxy
The life cycle stage of a star when it expands and cools after using up its hydrogen
Red Giant
The process by which stars produce energy, involving fusion of hydrogen atoms
Nuclear Fusion
A galaxy characterized by a flat, rotating disk with a central bulge surrounded by spiral arms
Spiral Galaxy
A galaxy with an ellipsoid shape and a smooth, nearly featureless brightness profile
Elliptical Galaxy
A galaxy that does not have a well-defined regular shape and structure
Irregular Galaxy
A region of space having a gravitational field so intense that no matter or radiation can escape
Black Hole
The third nearest star system to the sun, after the sun and Proxima Centauri
Alpha Centauri
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