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5
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A system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.
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6
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A region of space from which nothing, not even light, can escape.
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7
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A galaxy with no regular shape.
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8
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Our galaxy.
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9
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The study of celestial objects, space, and the physical universe.
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10
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A galaxy in the shape of a spiral.
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1
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The universe seen as a well- ordered whole.
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2
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A massive and extremely remote celestial object, emitting exceptionally large amounts of energy .
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3
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a galaxy that does not have a regular shape.
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4
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A galaxy that is shaped like an ellipse (stretched circles).
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