Night Night
These are four celestial bodies in the solar system besides planets and the sun.
What are comets, dust, moons, and asteroids
These are the three models of the solar system that we studied.
What is geocentric, heliocentric, and hybrid?
If you are at the north pole, your celestial equator will be here.
What is the horizon?
This is Kepler’s 2nd Law.
What is equal areas in equal time?
Region of the sky (13)
What is constellation?
This is the average distance from the Earth to the Sun.
What is an Astronomical Unit (AU)?
This person created the heliocentric model.
Who is Copernicus?
If you are in the northern hemisphere and look north, stars will appear to move this way.
What are CCW?
This law states that planets orbit the sun in elliptical paths.
What is Kepler’s 1st Law?
What is celestial sphere?
A planet must meet these three requirements.
What is:
1. orbit a star (or stellar remnant)
2. spherical
3. clear orbit from planetesimals
This solar system model is the simplest.
What is the heliocentric model?
This is the apparent westward drift of the planets.
What is retrograde motion?
If a planet is four times the distance from the sun, its force of gravity will decrease by this factor.
What is 16 times?
Stars that never set (11)
What is circumpolar?
A closed fist at arm’s length is this many degrees.
What is 10 degrees?
This model was able to explain detailed planetary motions.
What is none?
This is the altitude of Polaris when observing from Germantown, WI
What is 43 degrees?
This is the farthest distance from the sun to a planet.
What is aphelion?
Aligned with Earth's axis of rotation - two words (14)
What are celestial poles?
This is the angular diameter of the sun as well as the moon.
What is 0.5 degrees (30')?
This physical observation (by Galileo) gave way to the acceptance of the Sun-centered model.
What are the observed phases of Venus?
Draw the star trail looking south from Germantown.
What are clockwise arcs?
This is the farthest distance from the center of an ellipse to the orbit.
What is the semimajor axis?
Declination of zero degrees - two words (16)
What is celestial equator?