Space Is So Creepy And Wonderful. Who The Hell Needs Hell When There’s Space.

Space is so creepy and wonderful. Who the hell needs hell when there’s space.

Like there’s an old constellation called Eridanus that you can see in the southern sky, and its not a very interesting constellation. It’s a river. It’s actually the water that’s pouring out of Aquarius, so in the sky it’s kind of boring. It’s a path of stars.

But within Eridanus, in between the stars, there’s a place where the background radiation is unexplainably cold. Because after the Big Bang, there was all this light that scattered everywhere, and it’s the oldest light in the universe, but we can’t see it. It’s so dim that it only shows up as a glow of microwaves, so to us, it just looks like the blackness of the night.

But there’s this spot in Eridanus where that little glow of ancient microwaves isn’t what it should be. It’s cold and dark.

And it’s enormous. Like a billion light year across. Of mostly just emptiness. And we don’t know why. One theory is that it’s simply a huge void, like a place where there are no galaxies. Voids like that do exist. Most of them are smaller, but they’re a sort of predictable part of the structure of the universe. The cold spot in Eridanus, if it were a void, would be so enormous that it would change how we understand the universe.

But another theory is that this cold spot is actually the place where a parallel universe is tangled with our own.

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space astronomy theories parallel universe

Finally! A black hole that you can visit and survive!

Want a trip through a black hole without having to experience that pesky death? You’re in luck. There’s a special kind of black hole that’s not just survivable, but might get you to another time, or another universe.

Black holes are, traditionally, the scariest things in the universe. Huge, mysterious, inescapable, they wander through the universe and eat everything that gets too close. “Too close” is defined by their event horizon. This is the point at which they go dark, because it requires so much energy to escape them that not even light can get away. Since not even a photon can cross the barrier, no event that happens inside the horizon can ever have an effect on people outside.

Unless, something very odd was going on in the center of the black hole. Most black holes spin - this is something that was discovered way back in the 1960s by physicist Roy Kerr. It wasn’t exactly a shock, because most of the material that collapses into a black hole was already spinning. Sometimes, however, the spin on Kerr black holes goes a little above and beyond. Ever spun a glass of water, or soda bottle, so that the liquid inside swirls? Sometimes, if you spin it enough, the liquid actually parts, leaving a clear center and a spinning ring of water around it. The same kind of thing can happen in Kerr black holes. Instead of a singularity at the center, there’s a ring. And you can go through the open portion of that ring without touching the gravitational crush.

What’s on the other side? A lot of people have wondered. Some people think that these kind of black holes might be our key to time travel. They might be wormholes that let us hop between different points of the universe. Or they might be portals to different universes entirely. First we’ll have to find a few, and then we’ll need a few volunteers to go through. Preferably ones that haven’t seen Event Horizon.

Top Image: NASA/JPL-Caltech

Second Image: Dana Berry/NASA

Via NASA, Astrophysics Spectator, Discovery.

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astronomy black holes

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outofambit

11 years ago