Our earth is dying and so is our sun but don’t be scared this will probably take billions of years before it ever happened and by then, great minds like Elon Musk, Jeff Bezos might have figured out how we can potentially restart our species from another planet within the solar system or even far beyond the Milky way galaxy but this will be a very big ambition.
Ever wondered why it’s been so difficult or nearly impossible for Scientists to find any alien life outside of earth? Even the recently discovered Phosphine in the upper atmosphere of Venus is being disputed by scientists as to whether it’s being created by living organisms or just the “undead” planet’s surface.
Obvious truth is that the universe is huge and there have been numerous theories and hypothesis about whether there is life outside of our planet, solar system and even our galaxy considering how big the universe is and the fact that it continuously go farther apart every single seconds might make it hard to ever reach the end of the universe.
Humans have sent a number of probing satellites into the space with the task of touring it and sending us feedbacks about it’s encounters and discoveries but until now, nothing have been found.
Scientists even sent out radio waves into the void space with the hope that some days some people on the other side can hear us and send their own feedback so we can know that we’re not alone.
In case you ever wondered why it seemed that we’re the only ones on here, its basically due to the fact that majority of the planets out there despite numbering in millions cannot host lives. They have really hostile environments that makes it difficult for life of any shape or form not to talk of intelligent ones to evolve.
One essential thing that had helped sustained life on earth is the presence of Water and the thick atmosphere with it’s magnetic field thanks to it’s core which help it shield the planet from powerful ultraviolet radiations and violent interstellar winds.
Take our moon for example, it has no atmosphere which makes it very difficult to host life and because of it’s lack of atmosphere, scientists had found evidences of difference impacts with asteroids on it which is part of why it has the holes and burrows it has all around it although there are thoughts that it could eventually become a launching ground for deep space travel in the nearest future since gravity over there isn’t as powerful as those on earth.
What if something happens to earth maybe a giant asteroid impact that could potentially wipe out every living creature on the planet. Where would we go?
Scientists have been unable to find any life outside of our planet, are we doomed to live on earth forever until it is destroyed or is there a chance that humans and other animal species can make their way out of here to somewhere that seemed more like home.
Well as mentioned earlier, what makes life possible here on earth is the fact that it has everything needed to support life in the first place which includes its liquid and atmosphere. So in case something ever happen, here are some planets we can colonize and start afresh.
The red planet Mars
Yeah you guessed it right. Mars will be the number potential place for humans and other living organisms to colonize and the fact remains that we’ll probably colonize the red planet sooner than we think with billionaires like Elon Musk and Jeff Bezos both working hard on their interplanetary endeavors through their companies SpaceX and Blue Origin respectively.
One of the reasons this is a suitable alternative to earth is because number one, it’s the closest we can find to be inhabitable with it’s atmosphere much like that of earth though the atmosphere is much thinner which can still be really dangerous to humans.
But the development of settlements on the red planet could be positive as well as being able to create water as research found that the planet has majority of its water deposit frozen in the northern pole.
There is also a detection of a lake beneath the southern polar ice cap and there is a significant amount of methane which is produced via biological processes (though we don’t know what produces that of Mars)
The planet has a 24.5 hours day and the planet’s history was said to have been similar to earth at one point before turning reddish as a result of it’s cloud being stripped away exposing it much more to the sun. While Mars will not likely be like earth in it’s entirety, it’s a place we can all be under protection.
Jupiter’s moon, Europa
Europa is one of planet Jupiter’s moon which was discovered back in the 17th century by Galileo Galilei as well as other three giant moons orbiting the largest planet in our solar system. The planet Jupiter as it’s often referred to is a “gas giant” basically due to what its made up of. But we’ll discuss Planet Jupiter later on.
Europa on the other hand is our second candidate which has a smaller size compared to our moon here on earth and it orbits around Jupiter at a distance of about 670,000km once in every 3.5 Earth days.
One problem with this planet is that it orbits around the largest planet in our solar system which has the biggest gravitational pull which is why to even reach the planet itself, you’ll have to pass through the asteroids belt. The importance of the planet Jupiter here is clearly stated that without it, planets like Earth and Mars would be smitten on the regular by rogue asteroids that failed to become a planet or a moon.
Europa also faces that hurdle of being constantly squeezed and stretched by the competing gravitational fields of the gas giant and 12 other moons orbiting it. The process is know as tidal flexing.
The good side of it is that the planet is thought to be geologically active much like our Earth and due to the strong tidal flexing heats its rocky, metallic interior which keeps it partially molten.
The surface of the planet/moon is said to be a vast expanse of frozen water which makes some scientists think it might be possible to have microbial life in it.
At the bottom of this ocean world, it is conceivable that we might find hydrothermal vents and ocean floor volcanoes. On Earth, such features often support very rich and diverse ecosystems.
Saturn’s moon, Enceladus
The next on our list is Enceladus which is more like Europa in it’s characteristics as it’s fully covered with ice with a subsurface ocean of liquid water essentially what is needed for life in the first place.
The moon orbits around Saturn and has some really interesting things to offer when first discovered by scientists. The discovery of an enormous geysers near the moon’s south pole is interesting as it releases water from large cracks on the surface making scientists deduce there to be even much larger storage of underground liquid water storage on the planet.
There are also array of organic molecules and tiny grains of rocky silicate particles which can be found if the sub-surface ocean water is in physical contact with rocky ocean floor under a temperature within the range of 90 degrees Celsius.
With these discoveries, scientists knew there will exist hydrothermal vents on the ocean floor which could provide the chemical needed for life to start or be sustained on the planet. And do not forget that Saturn is also another gas giant in our solar system.
Another Saturn’s moon, Titan
Though the planet Saturn itself might not be hospitable towards life but it sure has companions that can and that is where it’s largest moon, Titan fits.
The moon has a substantial atmosphere which makes it the only one in the entire planet and it is ridden with complex organic molecules and methane weather system rather than water and it has seasons such as rains and dry seasons which is based on it’s location around the planet.
Presence of nitrogen is in its atmosphere and this chemical compound is used in building of proteins in all known form of life.
Observations of the planet also detected the presence of rivers and lakes of liquid methane and ethane posing the possibilities of cryovolcanoes which are like volcanoes that erupt liquid water instead of lava and that placed Titan as being hospitable to life much like the rest in this list.
Meanwhile it’s surface temperature is -180 degree Celsius which is very cold for liquid water but there have been different molecular properties found on the moon that made scientist wonder if there is any life form on the planet.