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History
Moon Phases
Vocabulary
Seasons
Numbers
100
This person is astronomy's first-time observer
Who is Brahe?
100
This means to grow
What is waxing?
100
Interplanetary debris
What is meteoroid?
100
It takes the Earth this long to reach the opposite side of its orbit and face a different group of stars.
What is 6 month?
100
300,000 km/s
What is a light-year?
200
The geocentric theory has orbits in this shape
What is perfect circles?
200
This means to shrink
What is waning?
200
A day measured by the stars
What is a sidereal day?
200
Earth's rotation axis is perpendicular to the line joining Earth to the Sun
What is an equinox?
200
23.5 degrees
What is the Earth's axial tilt
300
This is the backward motion of a planet
What is retrograde motion?
300
These are the 2 parts of a shadow
What is the umbra and penumbra?
300
The time interval from one vernal equinox to the next
What is a tropical year?
300
Occurs when the Sun is at its southernmost point and the North Pole is farthest away from the Sun.
What is the winter solstice?
300
29.5 days
What is the length of a Moon phase cycle?
400
Thales was part of this culture in astronomy
What is the Hellenistic Culture?
400
This is what the Moon goes through every 29.5 days
What is the Moon phases?
400
The time for the Moon to complete a full cycle of phases
What is a synodic month?
400
The longest day of the year
What is the summer solstice, June 21?
400
384,400 km
What is the distance between the Earth and the Moon?
500
These are the 2 theories proposed to explain the motion of the planets
What is the heliocentric and geocentric theories?
500
This phase comes after the new moon and before the first quarter moon
What is waxing crescent?
500
The result of any 2 objects that exert gravitational pull on one another over a long period of time
What is a tide?
500
This is associated with the end of winter and the start of a new growing season
What is the vernal equinox?
500
100 minutes
What is the length of a total lunar eclipse?