Kramer, Astron. Chap. 4
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| Measure of the amount of light a star actually gives off. | Absolute magnitude
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| Measure of the amount of light from a star that is received on Earth | Apparent magnitude
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| States that about 13.7 billion years ago, the universe began with a huge, fiery explosion | Big Bang theory
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| Final stage in the evolution of a very massive star, where the core's mass collapses to a point that its gravity is so strong that not even light can escape. | Black Hole
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| Layer of the Sun's atmosphere above the photosphere | Chromosphere
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| Group of stars that forms a pattern in the sky that looks like a familiar object, animal, or character | Constellation
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| Outermost, largest layer of the Sun's atmosphere; extends millions of kilometers into space and has temperatures up to 2 million K. | Corona
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| A large group of stars, dust, and gas held together by gravity; can be elliptical, spiral, or irregular | Galaxy
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| Late stage in the life of comparatively, low-mass main sequence star in which hydrogen in the core is depleted, the core contracts and temperatures inside the star increase, causing its outer layers to expand and cool | Giant
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| Unit representing the distance light travels in one year- about 9.5 trillion km - used to record distances between stars and galaxies | Light-year
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| Large cloud of gas and dust that contracts under gravitational force and breaks apart into smaller pieces, each of which might collapse to form a star | Nebula
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| Collapsed core of a supernova that can shrink to about 20 km in diameter and contains only neutrons in the dense core | Neutron star
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| Lowest layer of the Sun's atmosphere, gives off light and has temperatures of about 6,000 K | Photosphere
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| Areas on the Sun's surface that are cooler and less bright than surrounding areas, are caused by the Sun's magnetic field, and occur in cycles | Sunspots
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| Late stage in the life cycle of a massive star in which the core heats up, heavy elements form by fusion, and the star expands; can eventually explode to form a supernova | Supergiant
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| Late stage in the life of comparatively low-mass main sequence star formed when its core depletes its helium and its outer layer escape into space, leaving behind a hot, dense core | White Dwarf
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
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You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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