Are there earth like planets

These exoplanets come in a wide variety of sizes, masses, orbital distances and have compositions ranging from very rocky like Earth and Venus to very gas-rich like Jupiter and Saturn. Some planets may be dominated by water or ice, while others are dominated by iron or carbon.

But as it turns out, it takes a lot more than water for an alien exoplanet to harbour life as we know it. All the world around us -- the planets and moons in our solar system -- and this is the only habitable planet, bountiful and wondrous. Life, as we know it, was birthed here and has since sustained, thrived and transformed the global ecosystem, as well as became far more complex, intelligent and technologically advanced. And therefore, when scientists say they are looking for Earth-like exoplanets, they are looking for conditions similar to what we have here on the Blue Planet.

This is critical in enabling complex biospheres of the type found on Earth, and for an exoplanet to be potentially habitable therefore means it would develop an oxygen-based atmosphere.

There are many diffrent species visiting earth look how technology has changed in the last 2 decades, there are many different types of species some good some bad and all mostly with diffrent agendas take the moon for example!!!!!

Look at Mars what ever intelligent life was on there was wipped out by nuclear weapons of mass destruction people think our creator is God! Im sorry to disapoint you but our creators are alien races where we have been spliced it might sound stupid to you but there watching us!!!!!!!! We are not alone. Growing up in the remote village, I saw what all the village have also seen it. The most beautiful, biggest space ship moving so gently, like tourists exploring the world.

I have never seen such a beauty my entire life, now I am 44 years old, I saw it when I was 13 year old around What shocked me the most about this spaceship is that, it was moving without even a slight sound, very quiet.

So quiet that if someone is busy doing his things it can pass without one seeing it. The shape was a V-shaped. One seeing all this, you could see that this is so advanced that if it eccellerate, it will dessapear within a blink of eye. One day I watch our jets plane passes by, when I compare it,with our planes they are still small and the speed is very low.

I can accept that we are not alone, but to say that life on other planets exists without that specific proof, well I cannot buy it! Email address is optional. Since , Planetary Society members and supporters have been helping Yale University astronomer Debra Fischer and other scientists improve exoplanet-hunting technologies. Learn more about Fischer's quest to find Earth-like worlds.

To better predict the habitability of Earth-like worlds, exoplanet researchers need to understand the atmospheres around them. A significant, explicit part of its mission is to study the atmosphere around Earth-like worlds. It takes a lot of precise circumstances for a planet like ours to exist. Economy Humanities Science Technology. Multimedia OpenMind books Authors. Featured author. Peter Koslowski. Latest book. Work in the Age of Data. Science Physics. Astronomy Astrophysics Humanities Space.

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