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Difference between Inner and Outer Planets

Inner Planets: Outer Planets:

 The planets whose orbit rests inside the  Outer planets are the ones, whose
asteroid belt is known as inner planets. orbit lies external to the asteroid
 These are small in size. belt.
 They are high to moderate temperature.  Their size is comparatively larger
 They consist of solid elements like rocks than inner planets and has a ring
and metals. around them.
 It includes Mercury, Venus, Earth, and  They have low to very low
Mars. temperature.
 They are made up of gasses like
hydrogen, helium and so on.
 It includes Jupiter, Saturn, Uranus,
Neptune.

8 PLANETS OF SOLAR SYSTEM
 Our solar system comprises of 8 planets: Mercury, Venus, Earth, Mars, Jupiter,
Saturn, Uranus and Neptune. The planets do not have their own light. They can
reflect the light of the sun that falls upon them.

Mercury (Budh)
 It is the planet that is closest to the sun.
 It is the smallest of all the planets.
 It is difficult to observe Mercury because it hides in the glare
of the sun.
 Therefore it can only be observed or viewed in the sky just
before the sunset or before the sunrise.
 It has no natural satellite of its own.

Venus (Shukra)
 It is the brightest planet in the night sky.
 It is hottest compared to all other planets.
 It can sometimes be viewed in the eastern sky before the
time of the Sunrise or in the western sky before the sunset.
Hence it is often called morning or evening star.