First, there was nothing. So much nothing, in fact, that it stopped being nothing. It became something. A little speck of universe, which suddenly stopped being little, or a speck. In seconds, faster than physics say is possible, a whole… whole… a whole everything was made. Good Lord, this science field is vague. So anyway, this everything wasn't much of anything, since it was pretty empty. But then the everything that isn't much of anything started having something in it - elements. The elements made more somethings, and we suddenly had many somethings in our everything.
We had stars, big balls of stuff that look like fire, but totally aren't fire. Liar Fire, as the fake astronomers such as myself call it. Around those stars were balls of rock. Some balls of rock also had gas around them. Others became great friends and merged into one celestial body, which is how our planet was formed. A bit of sparkling friendship broke off from the newly bonded rock balls, and we suddenly had a moon. He spins around us and causes strange gravitational fields, which make oceans rise and fall… tides. He's also really nice and intercepts all those asteroids that can potentially wipe out life on Earth, except he missed one, and that's why giant lizards don't still exist. But we forgive him, because without him, we literally would all be dead.
There are also a lot of other things in space. Like nebulae, clouds of dust and sparkly stuff that sometimes make stars. Those nebulae float around in space, but they don't really do anything. Nothing cool or spacey or whatever. I mean, one looks like a horse, I guess. Another is already long gone, but the light is lagging behind, so we can't see that it's gone. And then one is visible with the naked eye, from Earth, if you really squint. Mostly, nebulae don't do much more than look neat.
We also have black holes, which are so dense, they absorb everything, including light. From a logical perspective, this makes no sense, because light is energy, and thus has no mass. Gravity should not affect it in any way, but hey, science. Black holes haven't actually been observed, for obvious reasons, but Google shows some cool clip art concepts of them. Black holes are the direct result of big stars exploding (because stars do that. Don't worry, it's a natural part of growing up), and then the leftovers collapsing in on themselves. People have speculated that a black hole formed on Earth a couple of years ago to explain an unexplainable natural disaster. Obviously that's as impossible as, like, I dunno, then making more Star Wars movies or someth… Nevermind.
Lastly, there are wormholes. They probably exist, but we don't actually have proof. Right now they're place holders for astronomers and sci-fi writers alike. Hypothetically, you should be able to bend space to travel through it faster, says the wormhole-believers. Because, obviously space is bendable. Duh. Come on, keep up. We'll probably never find a real wormhole, because we're trying to, and no discovery in this godforsaken field happens on purpose.
Aliens, too, are things. Maybe. Probably. Statistically speaking, they definitely exist. We just haven't found any yet. We likely never will, since nothing in this godforsaken field happens intentionally. Hmmm, this sounds familiar. Maybe when we find them they'll be nice. Maybe they won't be as nice. Perhaps they'll cause our extinction. There is actually a high chance they will cause our extinction. Very high. But we'll still scream into space our exact location and level of technology for anyone to hear, because science. Man, I love this godforsaken field of space-bending and light-eating holes.
Eventually, many millenia in the future, our sun will burn out. Or explode. Eventually every star in the Milky Way galaxy will do so. Spaces between galaxies will have grown so distant, light distortion will block all other stars from being seen. And then those stars will go out too, and the universe will be plunged into complete, total, absolute darkness. Perhaps then a new universe will form. Maybe one with new laws, new physics and mathematics, one which will tear apart what we think of as absolute. We have a lot stacked against, and the numbers suggest we'll go extinct by then. But we humans have a habit of overcoming the odds. We beat the Nazis, ended Polio, landed on the moon. Something tells me that if we work together, we'll do just fine.