7.1 Glossary
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Accretion | The process in which particles of dust and rock slowly come together due to gravity to form a larger object
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| Binary Star System | Two stars that orbit a common center of mass
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| Black hole | A collapsed star so massive that not even light can escape from its gravitational field
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| Galaxy | A large group of stars attracted to one another by gravity
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| Gravitational lensing | The bending of light rays due to the distortion of space caused by a massive object such as a black hole
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| Gravity | The force that cause all matter to collect together
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| Light-year | The distance light travels in a year
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| Milky Way | The Galaxy in which the solar system is located
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| Nebula | A cloud of gas found in empty space between stars
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| Nuclear Fusion | The process in which hydrogen is converted into helium to produce light and heat
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| Parallax | A technique used to measure the distance to other stars
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| Parsec | An astronomical unit of length equal to 3.26 light years
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| Protoplanetary Disk | Disk of gas surrounding a Protostar that will form into planets
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| Protostar | A collapsing cloud of gas that will eventually become a star
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| Radiation pressure | The force produced by radiation from pressure caused by heat
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| Stellar Parallax | The apparent change in the position of a star throughout the year due to the Earths motion around the sun
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| Super-massive Black Hole | A black hole millions or billions of times the mass of our Sun found at the center of a galaxy
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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.
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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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