Although there are a few planets similar to Earth's gravity, atmospheric pressure, temperature, size, etc. Mars is the planet that is most like Earth. Long ago, it was believed that Mars harvested water, just as Earth does now. Mars also has a little over twenty-four hour days and the rotation is much like Earth's.
Mars
The planet similar in size to Earth is Mars.
When we say 'life' what we normally mean is 'life similar to that on Earth', and obviously the Earth is the planet which most favours that type of life.
Venus is the planet that is most similar to Mars in terms of size and composition. Both planets have a similar rocky surface and a thin atmosphere. However, Venus has a much thicker atmosphere and is much closer to the Sun than Mars.
Mars. Its day-night cycle is only about 40 minutes longer than Earth's.
Mars
Mars
Venus.
The planet similar in size to Earth is Mars.
That's Mars.
Venus is most similar in size and mass to Earth. Both planets are considered terrestrial planets and have similar compositions and densities, which is why they are often referred to as "sister planets."
Venus is the planet most similar to Earth in size, mass, volume, and density. It is often referred to as Earth's "sister planet" due to these similarities despite having a very different atmosphere and surface conditions.
When we say 'life' what we normally mean is 'life similar to that on Earth', and obviously the Earth is the planet which most favours that type of life.
Venus is most similar to Earth in terms of mass and diameter. Venus is almost the same size as Earth, with a diameter about 95% that of Earth, and its mass is about 81.5% of Earth's mass.
Venus is closest to the Earth in size and mass. Its diameter is around 95% of Earths, while its mass is around 81.5% of Earths.
Venus is often compared as Earth's "sister planet", being similar in size and internal composition.
Mars