A list of terms from apihelion to comets
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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| Astronomy | The study of creation beyond our atmosphere.
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| Perihelion | Earth's closest point to the sun.
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| Aphelion | Earth's farthest point from the sun.
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| Period | The amount of time a planet takes to complete its orbit.
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| Astronomical unit | A measure used by Kepler equal to the earth's distance from the sun.
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| Vacuum | A space containing no matter.
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| Retrograde | Moving backwards (from east to west).
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| Mare | Dark patches on the surface of the moon.
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| Satellite | Any object which revolves around another object.
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| Lunar month | The amount of time it takes the moon to revolve around earth (29d 12h 44m).
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| Asteroid | A stony or metal object smaller than planets and orbiting the sun.
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| Comet | An asteroid sized object made of rock and frozen material and forms a bright tail.
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| Nucleus | The heart of a comet made of two-thirds ice and one-third dust.
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| Coma | The gas and dust forming around a comets nucleus.
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| Tail | A highly reflective streamer emitted from a comet.
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| Meteoroid | Fragments from asteroids much smaller than them.
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| Meteor | A meteoroid that has entered the earth's atmosphere.
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| Meteor shower | An event that takes place when the earth passes through a meteoroid stream causing meteor to fall much faster than normal.
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| Meteorite | A meteor that has crashed to the earth's surface.
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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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Created by:
MarciM31601
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