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52 Cards in this Set

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waxing crescent moon
What phase of the moon is this?
new moon
What phase of the moon is this?
first quarter moon
What phase of the moon is this?
waxing gibbous moon
What phase of the moon is this?
full moon
What phase of the moon is this?
waning gibbous moon
What phase of the moon is this?
Third quarter moon
What phase of the moon is this?
an umbra
What is this a picture of?
___________ is the study of the stars
Astronomy
________ is called an asterism; an area in the sky where the set of stars is called a ___________.
Pattern

constellation
Is polaris the brightest star?
No, vega is the brightest.
What is the ecliptic tilted at?
23.5 degrees
equivalent to longitude on Earth’s equator and is located in the celestial sphere
Right ascension
degrees up or down from equator; equivalent to latitude on Earth
Declination
divides the sky into northern and southern hemispheres, just as the Earth’s equator divides the earth into two hemispheres.
Celestial equator
This artificial, earth-based view of the heavens to make celestial maps by pretending that the stars are attached to the inside of an enormous hollow shell with which the Earth is the center.
Celestial sphere
When the earth spins around on its axis, it called what?
a rotation
When the earth spins around the sun, its called what?
a revolution
Motion of the celestial bodies is apparent in time-exposure photographs.
Diurnal or daily motion
___________ is when the stars never go below the horizon. They NEVER set.
Circumpolar
How long does it take for the earth to go around the sun once?
364 and 1/4 days
How many years does it take to have a leap year?
every 4 years
T or F

Every 100 years there is NO leap year.
True
What is the name of the point directly overhead?
Zenith
What is the line that goes North to South and through the Zenith.
meridian
What is the sidereal period?
It is the motion with respect to the stars
T or F

The solar day is a little longer than the sidereal period.
True
Every ___ degrees of longitude around the globe begins a new time zone. There are ____ time zones.
15
24
iii. Going from one time zone to another usually requires you to change the time on your wristwatch by exactly an _____ .
hour
What causes the seasons?
THe tilt of the Earth's rotation axis with respect to the ecliptic causes the seasons. They aren ot caused by the changing distance from the Earth to the Sun that results from the shape of Earth's orbit.
– From day to day, the Sun traces a straight path on the celestial sphere.
- makes a closed circle bisecting the celestial sphere.
- when the Earth orbits the Sun in a plane.
Ecliptic
– the day that the Sun rises farthest south of east is around December 21st each year. Also the day when the Sun rises to the lowest height at noon.
Winter solstice
the sun crosses the celestial equator heading northward.
Vernal equinox
– 3 months after vernal equinox, around June 21st, the Sun rises earliest, farthest north of east, and is highest in the sky at noon. The day of the year in the northern hemisphere with the most daylight.
summer solstice
when there is the same hours in the day as the night.
equinox
i. A slow circular motion of the Earth’s axis of rotation.
ii. Earth wobbles
precession
The _____ is in synchronous rotation with the earth. _____ side changes, but the ____ side stays the same.
Moon
Dark
far
________ period of the moon is when it goes in a full circle around the Earth. Full moon to full moon.
Sidereal
_____ moon is when there is two full moons in 1 month, the second moon is the blue moon.
Blue
What is it called when the moon is tilted 5 degress from the ecliptic?
Eclipse
What is it called when the brightest full moon often darkens to a deep red?
Lunar eclipses
What is it called when broad daylight is transformed into an eerie twiglight, as the sun seems to be blotted from the sky?
Solar eclipse
part of the shadow where all direct sunlight is blocked by the Earth.
Umbra –
the shadow is where the Earth blocks only some of the sunlight.
Penumbra –
when the mOon passes through only the Earth’s penumbra, is easy to miss. The moon still looks full, just a little dimmer than usual and sometimes slightly reddish in color.
Penumbral eclipse –
when just part of the lunar surface passes through the umbra, a bite seems to be taken out of the Moon
Partial eclipse –
When the Moon travels completely into the Umbra.
Total eclipse –
a tiny crescent
New moon
7 days after new moon; more illuminated
Waxing crescent moon –
half of the moon is illuminated
First quarter moon-
rounded on both sides
Waxing gibbous moon –
we see all of the illuminated moon
Full moon –