If you want to calculate the chances of them looking at us, you will need to work with degrees and the size of the observable universe as well as the amount of galaxies, billions is an understatement.
The chances come out as literally 0. This makes me so sad, angry and scared at the same time.
The universe is just mind-boggling big and even if there is life out there, it could take millions of years to even get there with lightspeed. If it's another galaxy, billions or even more years.
Just imagine putting a human into a spacecraft and start counting the years.
One of my fears is that we find life, but to send a single signal we have to wait years in both directions, imagine waiting 100 years for an answer to your question. My even bigger is, that we find it, just millions of light years away.
Anf it gets even scarier, since the universe is expanding, each galaxy will end up in its small bubble from which it will be impossible to travel to another galaxy since the space in between expands faster than you could physically go.
That means at one point everything is so far away that even if we wanted, no technology could get us there.
And at another point our sky would slowly turn black.
This all is hypothetical since it's billions of years into the future, but it's scary how small humans are, we literally have no impact on the "world" .
Keep in mind that if you could travel at lightspeed the journey from the perspective of the traveller would be very quick due to the time dilation they would experience, same goes for visitors to our planet if someone somewhere created lightspeed travel
Thats technically the truth, since the closer you get to lightspeed the more time is not perceived.
Every Object that is massles instantly hits lightspeed as told by e=mc², if you form the formulate to calculte "the root of c²= the root of e/m" if you put in 0 for mass you get infinity, so technically you get c=infinity, which is not possible and it stops at the fastest possible speed. In other words you couldn't accelerate anything with mass to lightspeed because the energy needed to approach it, is so huge.
Sadly that part is not even doable. Because since you are always dividing by something you would need infinity energy which divided by something is still infinity.
And yes, the faster you go aka the closer you get to light speed the slower you perceive the time around you, but for you a year is still a year. The world around you just runs at a different speed in time. Thats the mind boggling part of the Theory Of Relativity. It took my way to long to understand that bullshit and i still don't entirely get it since its contradicting our everyday logic. The Time outside your spaceship would still go as usual. Nut I still have no understood it entirely and probably have made some errors.
IIRC it's because the speed of light is constant to all observers regardless of their relative speed. Like if one person is "not moving" while another is traveling at 50% speed of light, relative to a photon of light, that photon will still be traveling at 100% the speed of light to both of them.
Which wouldn't make sense, it's like you're driving 40mph down a highway, see someone going 60 mph in the same direction, they'd appear to be traveling 20 mph relative to you right? But nope they're still going 60mph. The only way this is possible is that time slows down for the observer traveling at 0.5c
Been a while though so I'm not sure I'm right either
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u/[deleted] Dec 13 '19
It fucks me more how many galaxies you see here. Great fucking picture!