Now, last week we started off our backwards time travel with the theory of going faster than the speed of light. Today, we will be talking about existing cosmic phenomena within our galaxy and other galaxies: The Black Hole.
I found more information on the black hole from several websites, all addressing the same thing, that the black hole is purely theoretical. One of the sites that helped me understand a bit more was the HowStuffWorks site, once again. What I found was not extensive or vast information on the black hole, but rather just a brief introduction to what it is, since no one has really confirmed if it will really work in time travel or not.
What HowStuffWorks talks about is what the black hole was and, in theory, what it can do. First off, what is the black hole? A black hole is what happens when a star dies. When the star dies, the nuclear fusion reactions stop and at the same time, the star's gravity pulls in objects and compresses the core. As the core compresses, it eventually creates a supernova explosion and the aftermath is a highly compressed and massive core. This core now becomes a black hole, creating a hole in space-time, hence the name "black hole".
How does time travel tie in to the black hole? Well, since it is a hole in space time, there a theories where the hole can transport to different places and possibly, different times. Think of this black hole as a tunnel, where the beginning is the black hole and the end is the white hole. The white hole is basically the exit where, unlike the black hole, spits out objects entering from the black hole. Considering this theory and the fact that it is technically a hole or rip in space-time, time travel could actually be possible. However, we couldn't really control it.
There are many obstacles preventing actual travel via black hole, considering it would probably crush you when you enter it (unless you're traveling via KERR black hole). Overall though, this is just one other theory to time travel, one that might be actually accessible, although near impossible.
Next time, on TARDIS Talk, we will be talking out the Cosmic Strings, yet another theory for time travel. No, its not a literal string if you're wondering, but more like a defect in space and time, kind of like a black hole.
Anyway, until next time my friends! Keep it classy.
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