Nicolaus Copernicus is a scientist states that the earth revolves around the ...... .
sun
stars
moon
If there were no gravity, the planets would fly off into space.
False
True
The ......... is the only center of motion in the solar system.
Earth
Gravity is the invisible attraction or pulling force that holds all the planets in their places.
Solar system consists of the sun and group of planets revolves around it
The shape of the object is affected by air resistance
The orbit of each planet has an ............ shape.
ellipse (oval)
circular
line
Earth revolves around the sun in a .......... speed
slow
very high
very slow
In solar system each planet revolves around the sun a fixed path called ............
plane
orbit
The great gravitational pulling force of the......... keeps the planets revolving in fixed orbits