Question

Kepler devised three laws to explain ? the in the universe. According to the first law, a planet revolves around the Sun in a path similar to ? with the Sun fixed at one of its focus points.
A)Gravitational force of earth
B)motion of the planets
C) Sizes of the planets

1)An ellipse
2)a hyperbola
3)a sphere

Answer 1

Kepler devised three laws to explain: B) the motion of the planets.

According to the first law, a planet revolves around the Sun in a path similar to 1) an ellipse with the Sun fixed at one of its focus points.

Johannes Kepler(1571-1630) was an astronomer who discover the three laws of planetary movement.

These are the complete set of laws that describe the motion of planets.

1.- The Law of Ellipses. The path of the planets about the sun is elliptical in shape, with the center of the sun being located at one focus.  

2.- The Law of Equal Areas. An imaginary line drawn from the center of the sun to the center of the planet will sweep out equal areas in equal intervals of time.

3.- The Law of Harmonies. The ratio of the squares of the periods of any two planets is equal to the ratio of the cubes of their average distances from the sun.

Answer 2

Kepler devised three laws to explain
B)motion of the planets 
in the universe. According to the first law, a planet revolves around the Sun in a path similar to
1)An ellipse
with the Sun fixed at one of its focus points.