We all know we are consuming Earth and its resources pretty quickly. Its resources are decreasing and we can’t depend on them for always. Also we have to admit that we are doing a very good job at F@ck!ng Earth and its atmosphere. We are releasing 2.4 Million Pounds Carbon Dioxide into air every second. Yup!! every second and that way more than what is healthy for our Earth buddy. The longer we stay on Earth the longer we will destroy it and no one knows till when Earth will abide our brutal behavior. It is obvious that we should have a backup plan.
Finding this Backup plan is called “Search for a 2nd Home” and as we are advancing in Space and Cosmos we are finding more and more Planets with a potential of being our second home.
There are about 2000 Alien Planets we know since 1995 but not all of them are potentially habitable because of their harsh conditions. But there are some planets which attract scientists to research them and may be in near future we’ll know our Backup Plan.
“Remember Habitable Conditions means conditions where Humans can survive easily”
Planets are given ESI index (Earth Similarity Index), ESI depends on different factors and planets with ESI index from 0.6 to 0.8 (ie Mars) can be habitable though habitability depends on many other factors too. So without any further dues, these are the Top Planets we know so far that are most Earth alike and can prove to be our potential home.
Nasa’s idea of Kepler -186f
Kepler is about 490 light years away from Earth and was discovered in 2014. It is 10% Larger than Earth in size and is very rocky planet. It is believed that it has massive rocky mountains. Kepler-186F is also known as cousin of Earth. Kepler-186F revolves an M-type dwarf Star which is about 3 times bigger than our Sun but not brighter than our Sun. It has 130 day orbit around its host star which is much less than our 365.15 day orbit. With ESI of 0.61, Its orbital distance and expected atmosphere shows that it can hold water in liquid thus it is referred as one of the most earth like planets discovered so far. However, most of its atmospheric conditions are unknown and more data is being collected about Kepler known as our cousin.
2- Kepler 452b
Artists Impression of 452b
Kepler 452b was discovered in 2015 by Kepler Space Telescope. It has a stunning ESI of 0.833 which is great. It revolves its star named Kepler 425 which is about the same mass as our Sun. Additionally, Kepler’s distance to its sun is about the same as of Earth from Sun so it is in the habitable zone. Kepler 452b also called Earth 2.0 itself is 5 times the size of Earth with twice as much gravity. So if there is any life there they would have denser and stronger bodies than ours (it won’t be an easy fight Earth Aliens). It’s approximated year is about 385 years and is also referred as Earth’s Big Cousin. The bad part is that it has expected to have large volcanoes and thick clouds which could make it suffer greenhouse effect, same as of Venus went through. But this is just a rough estimate so let’s just hope it won’t be like this.
3- Kepler 62e and 62f
Kepler 62 is a red dwarf star and it is slightly smaller and dimmer than our Sun. It is surrounded by a system 5 planets revolving around it and among them are 2 earth like planets that can potentially be future home for mankind. Kepler 62e and Kepler 62f revolves in the habitable zone of its K-type star. Kepler 62e has an ESI of 0.83 and Kepler 62f has an ESI of 0.69. Both Planets are 1200 Light years away from Earth which is far more than our Kepler Cousins.
Kepler 62e is however more earth like in every way and consist of mostly water. It is a huge Ocean world with 1.4 the size of Earth and Humid temperature but future researches will give us a more deep insight on what and how this Kepler 62e works and looks.
4- Gliese 667 Cc
Gliese 667 c impression, as you can see 3 stars. 1 is main dwarf and other 2 distant stars.
Gliese 667 Cc is probably one of the closest potentially habitable planet so far in the list. It is about 22.1 light years away from Earth. However, it is a pretty complex planet. It is a part of 3-star system with 1 main dwarf star and 2 distant stars. But the main problem with Gliese is that it has 2 hemispheres and both have completely different properties and characteristics. As 1 hemisphere is in complete darkness which is too colder to live and 1 hemisphere is always facing dwarf star and is too hot. But here is the swing, there is a part between these 2 hemispheres which is habitable. Afterall it has an ESI of 0.85. Still, there is a lot to learn about this planet yet and only then we could see whether it can really be our future home.
With all that being said, after all, there is a lot yet to discover in this large universe where we live. But we should never leave hope of finding a future home one day.