Term
Kepler's first law states that a planet moves around the Sun in a(n)
elliptical orbit, with the Sun at one focus. circle, with the Sun at the center. elliptical orbit, with the Sun at the center of the ellipse. elliptical orbit, with the Sun on the minor axis of the ellipse 

Definition
elliptical orbit, with the Sun at one focus. 


Term
The eccentricity of a planet's orbit describes
how different its orbital path is from a perfect circle. its tilt with respect to the plane of the Earth's orbit (the ecliptic plane). its motion at any specific point in its orbit as seen from the Earth, that is, whether direct, retrograde, or stationary. the tilt of the planet's spin axis with respect to its orbital plane. 

Definition
how different its orbital path is from a perfect circle. 


Term
Kepler's second law states that a planet moves fastest when it
is closest to the Sun. is farthest from the Sun. is at conjunction. passes through the minor axis. 

Definition


Term
Kepler's third law can be described in which of the following ways?
The smaller the orbit of a planet, the longer the planet takes to complete one revolution. The larger the orbit of a planet, the longer the planet takes to complete one revolution. The smaller the radius of a planet, the more rapidly it rotates on its axis. The time to complete one revolution of its orbit depends on the size or radius of the planet. 

Definition
The larger the orbit of a planet, the longer the planet takes to complete one revolution. 


Term
I have a massive purple object in my laboratory. If I were to take it to the Moon, which of its characteristics would be guaranteed to change?
mass density (mass per unit volume) color weight 

Definition


Term
How much gravitational force acts on an astronaut in the Space Shuttle in a circular orbit 300 km above the Earth's surface? (note that the Earth's surface is about 6000 km from the center of the Earth)
a little bit less than when the astronaut is standing on the surface of the Earth zeroâ€”the astronaut is weightless exactly the same as when the astronaut is standing on the surface of the Earth a little more than when the astronaut is on the surface of the Earth 

Definition

