1. The sun's keeps planets in our solar system in orbit around the sun.
2. Comets are examples of bodies that complete parabolic or
orbits.
3. The orbits of all the planets in the solar system are slightly elliptical with the exception of
laws describe why objects
4. Kepler's laws describe how objects move through space;
move in this way.
Respond to the following based on your reading.
5. Describe the differences between a geocentric model and heliocentric model. What model is
the current Sun-Earth-Moon System based on?

Amath expression is a collection of one or more terms, which are separated by the signs ( + , - , x , / ).example :   8+b8+b  or  a−3a−3in algebra, an equation is a mathematical statement with two expressions where, each expression is separated by an equal (=) sign. variables can be present on both the sides of the equality (=) sign and we use letters to denote such variables.example 1:   x=4+2x=4+2  , [here, we can observe that the variable is present only on one side of the equation].example 2:   2x+3=x+42x+3=x+4  , [here, we can observe that the variables are present on both side of the equation].