The existence of Aliens have been questioned since ages. No one knows if they exist or they don’t, but everyone including the scientists only speculate. The main necessities for life are largely some form of energy source and water. And surprisingly, some exoplanets and moons, fit in this category. It can’t be said for sure if we could find aliens there, but still, we can say there is a possibility to say the least.
1 – Trappist – 1
A planetary system a few dozen light years away, consists of seven Earth-like exoplanets that can apparently be studied using telescopes. They have reasonable temperatures due to the nature of their star, around which, they orbit and are cool enough for liquid water to have a chance to form, more specifically the three in particular, falling in the area around a host star.
2 – Titan
Titan, the largest moon of Saturn, has water and liquid, but not liquid water. It has solidified water due to cold temperatures and lakes filled with liquid hydrocarbons – the compound of hydrogen and carbon in varying proportions. But the expected aliens would survive on hydrocarbons rather than water, here.
3 – Europa
One of the Jupiter’s Moons, Europa, is thought to have all the necessities for life including water – stored in oceans underneath, energy sources, and the right chemical buildup. In a mission called Europa Clipper, a spacecraft to Jupiter’s moon would be sent repeatedly to take pictures of the surface, analyse it and search for life.
4 – Mars
Finding extraterrestrial life on Mars really is a serious possibility, and apparently there is an evidence of microscopic life present on Mars. Also NASA’s data suggests a past presence of floods and streams throughout the dry surface indicating that life could have survived once in there.
5 – Enceladus
This is another moon to Saturn, but it has the capacity to hold water underneath its crust just like Europa. This could mean that there might be microbes of some kind living there. In 2017, a mission involving Cassini spacecraft detected hydrogen molecules pointing towards an energy producing chemical reaction that could be useful to lifeforms.
6 – Kepler-186f
Orbiting the star Kepler-186 about 500 light-years from Earth, Kepler-186f is an the first Earth-size exoplanet found to be orbiting in its star’s habitable zone. The fact that it is the closest match to Earth and in the habitable zone, indicates there could be life in some form.
7 – Kepler-452b
About 1000 lightyears away and located in the habitable zone, Kepler-452b could be the best place to find aliens, according to NASA. Kepler-452b’s star is much more Sunlike, which is certainly interesting, and also, it is science’s most notable subjects, particularly in the eyes of the SETI (Search for Extraterrestrial Intelligence) Institute.
8 – LHS 1140b
The ‘Super Earth’, considered as one of the best opportunities to find life, is recently discovered and is in the star’s habitable zone. 40 lightyears away, it is 10 times bigger than the Earth and apparently easier to send a signal to intelligent life there, should it exist.
9 – Tabby’s Star
1,500 light-years away from Earth, and discovered by Yale astronomer Tabetha Boyajian, Tabby’s Star, or KIC 8462852, has received a lot of buzz for being the host of an “alien megastructure”. The extreme rates of its dimming cannot be attributed to anything else, but aliens. So, alien megastructure – a giant device that captures energy from a star and converts it into something more useful, makes more sense.
10 – Ganymede
This Jupiter’s moon is believed to contain an ocean beneath its crust that could contain more water than Earth itself. Exploring this also gave rise to some new research methods, like by analyzing magnetic fields, scientists found that they can possibly deduce information about the interior of the object. A probe called JUICE (Jupiter Icy moons Explorer) is set to explore Jupiter’s moons in future.