What planet is physically most similar to the earth?

Answer 1

Either Venus or Mars.

• Venus is probably the closest match, in terms of size, mass, and density. It's atmosphere is very different, however. It's atmospheric pressure at the surface is almost 100 times that of earth, and it is made up almost completely of carbon dioxide. Temperatures are extremely hot and it has sulfuric acid rainfall and molten sulfur on the surface. Even unmanned probes don't last long on the surface due to the hellish conditions. It is one of two planets in the solar system without a satellite.
• Mars is smaller but roughly the same density. it has a thinner atmosphere, but the temperatures are much closer to that on earth - similar to arctic and antarctic regions of the Earth. It also has a couple of moons. Although the environment is harsh, it is possible that humans may land astronauts there before the end of the century.

Answer 2

Uranus and Neptune are the only planets thought to have water. They believe Mars used to be like Earth. They also believe before was pike this it ran into a different planet. That planet is said to be like Earth.

Answer 3

None is even close, at least in our solar system. The LEAST HOSTILE in terms of

those particular criteria would perhaps be a toss-up between Venus and Mars.

-- Venus has furnace-like temperature, 90% of Earth's gravity, a thick atmosphere

that's poisonous to Earthly life, and is too hot for liquid water although some steam

is possible.

-- Mars may have daytime temperatures as warm as Zero in some places, has 38%

of Earth's gravity, has enough atmosphere for dust storms with no poison gases

in it but not much that we could use either, and may have had oceans and rivers

of liquid water flowing around on it as recently as a couple of billion years ago.

And those are the CLOSEST ones.

To the technical purists out there: Sure some of my numbers are off, but

the point has been made, just as well as if every number were accurate to

a few ppm.

Answer 4

Venus is the planet that is most physically similar to Earth in terms of size and composition. It is often referred to as Earth's "sister planet" due to its similar size and density. However, Venus has a thick toxic atmosphere and extreme temperatures, making it inhospitable for life as we know it.

Answer 5

As far as we know, Mars is the planet that is the most similar to the earth.

Answer 6

Most feel that Earth is more like Mars even though it is smaller and has less gravity. At one time, it had surface water and more atmosphere.