Kepler's first law - the orbit of each p____ about the sun is an e___ with the sun at one f____. Second law - planets move f___ when close to the sun and s___ when farther away. Third law - more distant planets orbit the sun at a s____ average s___
a) planet, ellipse, focus, faster, slower, similar, speed
b) particle, equator, midpoint, quicker, steadier, significant, sphere
c) probe, arc, apex, rapidly, sluggishly, standard, space
d) point, trajectory, vertex, hastily, lazily, stable, spread