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A person who travels in space.
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Frozen balls of ice, gas and rock
orbiting the sun. Usually are
irregular shapes. Also known as minor planets.
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A scientist who studies space.
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The study of space.
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The gravity of a massive star or group of stars
causes it to suck in on itself. This
makes it so dense that not even light
can escape its gravitational field.
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A big chunk of rock, metal, and
ice that orbits the sun. Has a tail of dust and gases called a coma.
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Bunches of stars in the sky that look
like pictures.
Examples: Orion, Big Dipper, and
Pegasus.
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Immense systems containing billions of stars. Come in different shapes: spiral, elliptical,
oval-shaped, and some are irregular. The universe may
have 40 to 50 billion of them.
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Fragments of comets, planets,
moon, or asteroids that have broken off. Billions enter
Earth’s atmosphere every
day, but most disintegrate before reaching Earth.
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Meteors that fall to Earth.
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Our own spiral-shaped
galaxy. Contains about 200 billion
stars.
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A natural satellite that goes around a
planet.
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To travel around a body on a path in
space. For example: Earth
______s
the sun.
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A place equipped to observe space.
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A body in orbit around the sun.
There are nine in our solar system.
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A body in orbit around a planet. Our moon is an
example but some are also made by
humans.
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The sun, the nine planets that orbit it and the many
satellites, asteroids and
meteorites that are controlled by
the suns gravitational pull.
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Huge balls of hot gases. There are
billions in the universe.
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The closest star to the earth. The
center of our solar system. Gives us
heat in light.
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An optical instrument used to
view far away objects, such as
planets and stars.