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| Average-sized star in an average sized galaxy. |
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| collapsed star so massive that even light cannot escape. Gives off lots of x-rays. |
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| Energy given off by stars when they do fusion. Includes radio, infrared, visible, ultra-violet, x-rays, and gamma |
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| 500,000 miles in diameter. If a star isn't this size, it can't do fusion. |
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| Hertzprung Russel Diagram |
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| A graph of stars showing color, temperature, and brightness. Helps us understand the life cycle of a star. |
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| Process that takes hydrogen atoms, and mashes them into other elements, and gives off electromagnetic waves in the process. |
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| Distance between earth and sun |
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| Distance that light travels in a year |
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| A space probe that went to the four outer planets. Currently going to Sirius, and will get there in 300,000 years. |
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| Distance between earth and moon |
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| Device for collecting electromagnetic waves from stars or other objects. |
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| group of stars with a spiral, irregular, or globular shape; often surrounding a black hole. |
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| Device that allows us to examine the colors of light coming from a star, and determine the elements that are being made during fusion. |
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| Technique that allows us to find the distance from earth to a star. Relies on apparent shift in location due to a change in viewing perspective. |
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| Technique of using a planet's gravity to accelerate a space probe and get it to a destination in less time. |
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| Collection of dust and gas that eventually forms stars and planets. |
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| Ice and dust orbiting the sun. Most originate from the outermost region of the solar system. |
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