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a unit of distance equal to the distance light can travel in one year, about six trillion miles
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one of the stages of the moon or smaller planets as they change their relation to the sun. A phase is shown by how much of the moon’s or planet’s lighted area can be seen.
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An object moving around a star.
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to turn or spin in place.
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The smallest particle of any element.
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The gaseous area surrounding a planet or other body.
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a region or body in space with gravity so strong that neither light nor matter can escape it. Scientists believe that black holes form when very large stars collapse.
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A self-luminous object that shines through the release of energy produced by nuclear reactions at its core.
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Our Galaxy. (the word “Galaxy” actually means milky way in Greek).
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22/10/2010 • 1 Comment
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the star in the middle of our solar system. The earth and other planets revolve around it and receive heat and light from it.
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Category: Why use Technology?
