Venus, it is slightly smaller, and much hotter
The Earth's inner core is increasing in size as the planet cools.
With a radius of 3396km, the planet Mars is about the same size as the inner and outer core of the earth (which is around 3490km radius in total).
There is no planet that is one fourth the size of Earth. The closest is Mercury at 0.38 that of Earth.
Venus
Of the known planets, Venus is closest in size to the Earth.
The Earth's inner core is increasing in size as the planet cools.
Earth.
Venus because it is almost the same size as Earth.
Venus.Venus is Earth's Twin. It is almost exactly the same size but is so hot it can't even get close to supporting life. The gasses on Venus are very deadly and it is said Venus has no ground. Very interesting stuff, my friend.
Eris is an OUTER planet. The only inner planets are mercury, venus, earth and mars. An outer planet is not related to the size of the planet but rather the distance from the sun.
With a radius of 3396km, the planet Mars is about the same size as the inner and outer core of the earth (which is around 3490km radius in total).
Venus because they are almost the same size!
outer planet
No planet is exactly the size of Earth. Venus is close to Earth's size but slightly smaller.
The planet that was an outer planet, but was more like an inner planet was Pluto because of its size. The planet Pluto is no longer considered to be a planet.
Of the four inner planets in our solar system, Earth's moon boasts the largest size. Mercury and Venus have none; the moons of Mars are tiny by comparison.
I assume you mean "planet". That would be Venus.