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Astronomy and the solar system crossword

Khanfri Mouna

Word Bank
ASTEROID, ASTRONAUT, ASTRONOMER, ASTRONOMY, ATMOSPHERE, BLACK HOLE, CELESTIAL BODY, COMET, CONSTELLATION, COSMONAUT, CRATER, ELLIPTICAL, GALAXY, GALILEO, GRAVITY, LIGHT YEAR, METEOR, MILKY WAY, MOON, NASA, NEBULA, ORBIT, PLANET, QUASAR, REVOLUTION, ROTATE, SATELLITES, SOLAR, SOLAR SYSTEM, TELESCOPE

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Across
4.an spherical object that orbits a central star and reflects the suns light. It's diameter can vary but is usually between 1,000 and 100,000 miles.
5.shaped like an egg, but with equal ends.
7.They are not stars. They are galaxies traveling away from us at tremendous speeds.
10.The galaxy that contains the solar system. (2 Words)
11.a rocky object in space that can be a few feet wide to several hundred miles wide. they orbit in a belt between Mars and Jupiter
12.It enters the Earth's atmosphere, heats up, and looks like a brief streak of fire in the sky.
17.groups of stars in that people have imagined to represent various objects or mythical beings
20.super dense invisible objects in outer space that form when a massive star collapses from its own gravity. They have such an enormous amount of gravity that nothing, not even light, ca escape from them (2 Words)
21.one of a planet's natural satellites, generally no smaller than ten miles in diameter.
24.an instrument that can make faraway things appear closer. There are optical, reflecting, refracting, radio, and telescopes in space.
25.a person who travels in space.
27.The layer of gases surrounding the earth that has gravity strong enough to prevent the gases from escaping into space.
28.a scientist who makes observations and studies planets, stars, galaxies any anything else in space.
29.The National Aeronautics and Space Administration. It is in charge of all space programs for the United States.
30.a small frozen mass of gas, dust, and ice. They revolve around the Sun or pass through the Solar System in elliptical orbit.
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1.an object that is located in outer space (2 Words)
2.a huge collection of stars, nebulae, star clusters, and dust and gas that measures many light years across. Its shape can be elliptical, spiral, or irregular.
3.a cloud of dust and gas in space in which a star is born.
6.a hole formed by a meteorite hitting the surface of a planet or a moon.
8.units used t o measure distance in space (2 Words)
9.the attractive force of a body. The larger or more dense the body, the greater the gravitational force.
13.small objects revolving around a larger object. They can be natural, such as moons, or they can be artificial objects sent into orbit around the earth, such as communication, weather and navigation satellites.
14.something having to do with the sun.
15.he sun, and all the planets and other objects that orbit around it. (2 Words)
16.the path followed by an object in space as it moves moves around another object.
18.The Russian term for an astronaut
19.the orbital motion of one object around another. The Earth revolves around the Sun in one year. The moon revolves around the Earth in approximately 28 days.
22.he study of everything that is or was in space beyond the Earth's atmosphere. It is the oldest science, dating back thousands of years to when people noticed objects in the sky overhead and watched how they moved.
23.(1564-1642) - Italian mathematician, astronomer, and physicist. In 1609, He was the first person to use a telescope to observe the skies. He discovered the rings of Saturn, was the first person to see the four major moons of Jupiter, observed the phases of Venus, and studied sunspots
26.to turn around a center point, or axis, like a wheel turns on a bicycle.

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