“A Gamma-Ray Burst, like a giant sun-based death laser, could cook us with no warning.
In about a second, it releases as much energy as our own sun during its entire lifespan.”
“It’s really big. Like terrifyingly big.
Vacuum decay could be racing towards us at the speed of light and we’d never know. We’d essentially just suddenly cease to exist.”
“If you tried to hold your breath, your lungs would implode, so your best chance is to get all the air out of your lungs.
Impossible, surely.”
“Astronauts’ bodies change because of the zero gravity.
In a recent study evaluating 45 astronauts who had been in space from 4–6 months, bone loss was between 2% and 9% in areas such as the lumbar spine, trochanter, pelvis, and femoral neck. Further, 50% recovery of bone mineral density levels occurred within nine months after returning to Earth.”
“Your size is smaller than an atom to us when you compare yourself to the universe. When you die it will be like crushing an ant, making no difference.”
“The fact extragalactic stars exist. These are stars that exist outside galaxies within extragalactic space. How they got there is through various means, but the fact of the matter is. Imagine if there is an alien civilization living in a system with planets orbiting a star. And that is the only star that exists to them because the galaxies are so far away.
Not to mention the way they would view the universe would be so different as well.”
“Question: If the universe constantly expands, what is there just behind its border? Is ‘there’ even a thing?”
“Since the universe is expanding at a speed that us greater than the speed of light. We almost certainly will never be able to observe what lies outside if our observable universe.
The light from these distant areas will likely never reach us.”
“‘We are either alone or we aren’t, both are equally terrifying.’ – Arthur C. Clark”
“Solar Superstorms.
If a solar storm like the Carrington Event of the mid-19th Century were to happen today, it would destroy the entire world’s electrical grid.
The thing is … these storms aren’t rare random flukes. They happen all the time. Just since the Carrington Event, six other storms of similar magnitude have occurred. We’ve just been lucky that they’ve all missed the Earth so far.
We’re probably not going to remain lucky forever.”
“We are separated from the hostile environment of space by next to nothing. If the Earth were the size of a basketball, the entire biosphere — from the bottom of the ocean to the top of the troposphere — would be the thickness of a coat of paint.”
“Easy to forget space is silent. You see rockets and landings on TV, but the sound doesn’t travel. It’s pure silence.”
“Galaxies can eat each other. It’s called Galactic Cannibalism, not to be confused with Galactic Collision. But Galactic Cannibalism is a process in which large Galaxies merge together through tidal gravitational interactions.
Might not be the most disturbing, but I don’t know, the fact that Galaxies can be cannibals is disturbing enough.”
“Rogue planets.
There are trillions of them in the galaxy roaming interstellar space. One could just fall into the solar system at any time and completely disrupt Earth’s orbit ending life as we know it. They are completely invisible and probably wouldn’t be detected until well past the orbit of Neptune.
The good news is that space is so unimaginably huge that even that many rogue planets is basically a rounding error for the emptiness between stars.”
“If Alien life just began somewhere in the universe. We wouldn’t know for billions of years.”
“The sun is growing and 1.75 Bn years from now Earth will be like Venus.”
“More than 27,000 pieces of orbital debris, or ‘space junk,’ are circling the earth at over 15,000 mph.”
“The space is extremely hostile to all life. That the earth managed to develop one is a pure miracle.
As a planet, you are constantly bombarded by asteroids, ranging from pebbles to boulders the size of 10 sperm whales. Plus each asteroid brings different particles, that can either do nothing to you, or make the atmosphere toxic like the bathrooms in Walmart.”
“Betelgeuse, an unstable red giant star that sits 642 lightyears away is at the very end of its life cycle and is expected to go supernova anytime now. Its luminosity is fluctuating wildly in its current state and the star will ultimately go supernova and form a stellar-mass black hole once it does. Had our solar system been closer to this star, the supernova would likely trigger a mass extinction event via gamma-ray bursts on Earth. Fortunately, we are far enough away for the supernova to not pose any significant threat to Earth-bound life.”
“It would seem that one of these two seemingly impossible things must be true.
The universe is eternal. Everything in it has always existed and always will.
There was a time that nothing existed and at some point, things came to exist out of nothing.
Unless there’s something massive that we’re missing (a legit possibility), one of those things has to be true.”
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#20 - besides the fact that we can directly observe which of these is true (the latter), conceptually the former cannot be true. Think of it this way: if the universe existed infinitely far back, how did we arrive at today?
There is no "expansion" of space. You only fill infinite space with limited physically objects and You waste a lot of time to move from one object (say planet) to another.
So when you die where does the energy go? God rest his soul, maybe not
what energy?