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Components of the Universe Crossword

Across
Clouds of gas and dust that eventually form stars.
Causing expansion of universe to accelerate.
A rock that hits the Earth's surface.
No distinct shape and are oddly shaped.
Have trillions of stars but little to no gas or dust.
Galaxy with 3 main components: a bulge, disk, and halo.
Groups of stars that are gravitationally bound.
Streak of light formed by a space rock burning up as it passes through Earth's atmosphere.
Occurs when Earth passes through the tail of a comet of a cloud od dust left behind by a broken up asteroid.
Made up of gases and produce their own light and heat.
Down
Matter that does not give off electromagnetic radiation.
Leftover from gas, dust, ice, and rocks that formed the universe.
Very tight groups of old stars.
Contain only a few hundred, very young stars.
Inner planets that have rocky surfaces.
A huge collection of stars.
Most widely accepted theory for the formation of the universe.
Leftover part of solar system that never formed into a planet
The outer planets that have surfaces of slush.
Natural satellite of a planet.