because the stars gravity pulls them in and holds them in orbit
The Sun's gravity pulls on the planets.
Our Sun is mostly surrounded by space; but planets in the solar system do orbit the Sun (or more correctly, a common center of gravity near the Sun), so in a loose sense planets are around the Sun or move around it.
The planets travel around the sun.
no because the atmosphere is what stores the heat
The solar system or the planets
Its because the gravitational field of the sun pulls the planets towards the sun and balances the intertia of the planets which make them want to move in a straight line.
The planets orbit (travel) around the Sun.
planets will fall to the outer space ,they will collide with each other and they will melt or exploded
all the planets stay in orbit around the sun because of the sun's gravitational pull. The high orbital speed that keeps the planets from falling all the way into the sun and since there is no friction in the vacuum of space , that speed dosen't slow down.
the planets go around in circles around the sun
Planets circle in an elliptical orbit around the Sun.
The planets are satellites of the sun. The moons are satellites of the planets. The moons revolve around the planets captured by their gravity, while the planets revolve around the sun captured by its gravity and the sun.