question
Earth is located at one ______ of the Moon's orbit.
answer
focus
question
According to Kepler's second law, Jupiter will be traveling most slowly around the Sun's ______.
answer
aphelion
question
Earth orbits in the shape of a/an ______ around the sun.
answer
ellipse
question
The mathematical form of Kepler's third law measures the period in years and the ______ in astronomical units (AU).
answer
semimajor axis
question
According to Kepler's second law, Pluto will be traveling fastest around the Sun when at ______.
answer
perihelion
question
The extent to which Mar's orbit differs from a perfect circle is ______.
answer
eccentricity