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Astronomy Unit77

Astronomy Unit with Mr Tran in Science

QuestionAnswer
What is astronomy? The study of the moon, stars, and other objects in space.
What is an axis? An imaginary line that passes through Earth's center and the North and South poles, about which Earth rotates.
What is rotation? The spinning motion of a planet about its axis.
What is revolution? The moving of an object around another object.
What is orbit? The path of an object as it revolves around another object in space.
What is tilt? To cause to lean, incline, slope, or slant.
What is solstice? The two days of the year on which the noon sun is directly overhead at either 23.5* South or 23.5* North.
What is equinox? The two days of the year on which neither hemisphere is tilted toward or away from the sun.
What is a phase? One of the different shapes of the moon as seen from Earth.
What is an eclipse? The partial or total blocking of one object by another.
What is gravity? The force of attraction by which terrestrial bodies tend to fall toward the center of the earth.
What is tide? Anything that alternately rises and falls, increases and decreases, etc.
What is a satellite? A small object orbiting a larger one. There are many electronic objects that orbit the Earth.
What is a telescope? An optical instrument for making distant objects appear larger and therefore nearer
What is geocentric? Simply means the Earth in the Center. People used to believe the Universe was geocentric, or that the Earth was in the center of the Universe.
What is heliocentric? Measured or considered as being seen from the center of the sun.
What is an inner planet? Any of the four planets closest to the sun: Mercury, Venus, the earth, or Mars.
What is an outer planet? Any of the five planets with orbits outside the orbit of Mars: Jupiter, Saturn, Uranus, Neptune, and Pluto,
What is a comet? A small, frozen mass of dust and gas revolving around the sun.
What is an asteroid? A rock, or Minor Planet orbiting the Sun.
What is a meteroid? ny small object in Outer Space, such as dust, or a rock
What is a constellation? A grouping of stars which have been given names by ancient astronomers because of the way they look.
What is a galaxy? A group of stars, gas and dust held together by gravity.
What is a universe? The totality of known or supposed objects and phenomena throughout space; the cosmos; macrocosm.
What is the Milky Way? Our Galaxy. (the word "Galaxy" actually means milky way in Greek).
Created by: AndreaBhfl
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