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Sky Science Vocabulary

A gaseous body that produces its own energy through nuclear fusion, releasing it as light and heat.
A scale used to measure the brightness of stars and other objects in the sky.
The motion of a planet satellite, or the Sun around its north-south axis.
Bright stars grouped according to the patterns they make in the sky.
Chunks of rock that vary in size from very large to quite small.
A large ball of ice, dust, rock and gas that orbits the Sun, circling the dark edges of the Solar System.
When the Moon grows gradually less illuminated when passing from Full Moon to New Moon.
Large bodies that can only be seen by reflected light, as they revolve around the sun.
The path of a planet or other heavenly body as it revolves around another body in space.
The closest star to Earth and the center of our solar system.
A man made or heavenly body (Moon) that orbits around a larger object.
To send or give out.
The study of the Universe and all of the bodies that appear in the skies.
The motion of a planet along its orbit around the Sun.
A spiral island of stars in space. Our galaxy is called the Milky Way.
When the Moon grows gradually more illuminated when passing from new to full moon.
The time it takes for a planet to go all the way around the Sun.
Everything that exists: the Earth, the Sun, the Moon, satellites, stars, asteroids, all the galaxies and the space in between them.