Time Travel 2

By: Tsegazeab Beteselassie   

   

 

Warping space-time: This is an artist's representation of space-time being warped.
Link:kuark.org

    As you saw in my first time travel blog, (Time Travel: Into the Future, and Time Travel: Into the Past) there were two separate things that I had to do in order to time travel both into the future, and into the past. However, there is a better solution to this, that can use the same (or almost the same) way to time travel. It involves superfluids, speeds of light, and of course, time travel. Keep on reading in order to see what this solution is.

 

    First, lets think of a normal fictional time travel machine. You just get into the machine, press a few dials, and zip! Your there. However, the reality is much different. We can't actually tame time and force it to flow backwards for everybody. However, we can go through it. The reason why is that space and time are interconnected, in something called space-time. This was predicted in Einstein's theory of general relativity. I think this is one of the reasons that we experience time. But there's more. As gravity is produced by warping space-time with large bodies, and since space and time is interconnected, Einstein came to the conclusion that the larger the body, the more space, and time, is warped.*

Hypervelocty Stars: What are They?

By: Tsegazeab Beteselassie

Supermassive black hole: This is the start of a hypervelocity star.
Link:www.livescience.com 

In our galaxy, there are millions of millions of stars. Since our galaxy is a spiral galaxy, the spirals are spinning. That means our star, and every star, is moving very, very, fast, up to a million miles per hour. But not relative to each other. But there is a class of stars that are moving the same speed, but in a very different way. They are called "Hypervelocity Stars".

 

    What are they? You may ask. Well, they are stars that can travel up to a million miles per hour. That seems normal because normal stars are traveling the same speed. But that speed is not relative. So compared to other stars, hypervelocity stars are moving a million more miles an hour. That's 0.2% of the speed of light! But how can these hypervelocity stars move that fast?

 

    Since stars move at a million miles per hour, and since their should be tiny differences, shouldn't the faster ones be the hypervelocity stars? The answer is no. The reason is that most velocities (except the speed of light) add up. So the stars can't be the faster ones in a spiral galaxy. Also there is another problem. Stars like these come like, once in every ten thousand years. I don't think that there is a means to propel a star a million more miles per hour in a spiral arm. So we need another theory. But what other reason could they're be for a hypervelocity star?