Gravity :)
(Gravity also holds the outer planets tightly to the Sun.)
Gravity.
because of gravitational force of the earth is more in inner planet
Gravitational pull
none of the inner planets
Inner planets. are inner & outer planets. are outer
The inner planets are Mercury, Venus, Earth, and Mars. They are "inner" because the are the first 4 planets from the Sun.
After the inner planets you get the outer planets.
Inner planets
the inner planets are sometimes called Terrestrial Planets
The Sun's gravitational force is theorized to have swept up so much gas in the area of the inner planets and prevented them from acquiring much additional material from their surroundings. Thus, the inner planets initially ended up with no satellites.
Inner planets are terrestrial planets outer are jovian planets
the inner planets