Astronomy
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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| constellation | a region of the sky with well defined borders
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| celestial sphere | the illusion of a sphere that encompasses the earth
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| North celestial pole | point which lies directly over the North Pole
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| South celestial pole | point which lies directly over the South Pole
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| celestial equator | projection of Earth's equator into space
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| ecliptic | path the sun follows
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| number of constellations | 88
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| galactic plane | our galaxy's disk of stars
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| local sky | the sky as seen from where you are standing
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| horizon | boundary between Earth and sky
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| zenith | point directly overhead
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| meridian | imaginary half-circle stretching from the horizon from N to S
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| azimuth | direction of object along the horizon - measured in degrees
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| altitude | position of object from between earth and sky
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| angular size | angle that an object appears to span
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| angular distance | angle that appears to separate two objects
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| arcminutes | one degree divided by 60
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| arcseconds | one arcminute divided by 60
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| circumpolar | stars that never rise but make daily counterclockwise circles
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| latitude | measures N to S
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| longitude | measures E to W
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| prime meridian | line of longitude at 0 degrees - runs through Greenwich, England
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| sky visibility | sky varies with latitude
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| zodiac | constellations along the ecliptic
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| Earth's orbit | summer solstice, winter solstice, spring equinox, fall equinox
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| precession | a gradual wobble that changes the orientation of Earth's axis
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| lunar phases | new moon, waxing crescent, first quarter, waxing gibbous, full moon, waning gibbous, third quarter, waning crescent
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| synchronous rotation | moon must rotate once as it makes a single orbit around the Earth
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| lunar eclipse | earth's shadow falls on moon
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| solar eclipse | moon's shadow falls on earth
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| nodes | two points at which the moon crosses the surface of the earth
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| umbra | sunlight is completely blocked
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| penumbra | sunlight is partially blocked
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| total lunar eclipse | moon passes through earth's umbra - moon turns red
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| partial lunar eclipse | part of moon passes through earth's umbra
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| penumbral lunar eclipse | moon passes thought earth's penumbra
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| total solar eclipse | moon comes between sun and earth - moon looks black
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| partial solar eclipse | moon appears red in a crescent form
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| annual eclipse | a ring of sunlight surrounds the disk of the moon
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| eclipse seasons | two periods where the nodes of the moon's orbit are aligned with the sun
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| saros cycle | changing dates of eclipse seasons
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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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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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Created by:
sgw005
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