The planet similar in size to Earth is Mars.
Venus, with a diameter of about 7,567 miles; it is sometimes called Earth's twin.
MercuryVenus
The actual number of planets similar to the earth will likely never be known. The universe is simply too vast. However, it is likely that there are millions of similar planets.
Venus and earth.
the answer is Venus, and Earth
THEY ARE SMALL AND HAVE ROCKY SURFACESThey have a rocky surface, also known as terrestrial planets.They are rocky in their composition.They are roughly similar in size and density, and are all closer to the sun than the gas planets.
Earth maybe.Pluto and Charon would be, except that Pluto isn't a planet now.
Mars has a very similar angle of axial tilt to Earth.
MercuryVenus
Venus is closest to earths planet size.
The actual number of planets similar to the earth will likely never be known. The universe is simply too vast. However, it is likely that there are millions of similar planets.
Mercury and Venus :)
Of the eight planets in our solar system, Earths is the fifth largest or the fourth smallest.
Venus and Earth are similar in size, also Uranus and Neptune are pretty similar in size.
Venus and earth.
The Earths moon is a fairly small object compared with the planets and sun, but there are other objects which are of a similar size, such as dwarf planets. There are other moons of a similar size also, in orbit around other planets, but there are even smaller moons, down to only a few km accross which are named. Comets and asteroids are also pretty small, yet many have been identified and named.
Earths atmospheric size and composition is unique among all of the planets.
The mean size(volume) of all eight planets in the solar system is around 2.96 * 10^23 m^3 which equals about 273 earths.