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Showing posts with the label how did we come know universe is expanding

M-Theory | how to test string theory | dark matter | dark energy | Wormhole

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In the last post on “ string theory ” we discussed many things like the super symmetry, higher dimensions, strings, need for the theory of everything, different versions of string theory and many more. I request you to first read the previous post and then read this because this is the continuation of it.  There are many different string theories and that’s a big problem. We need only one theory that can explain everything in the universe. Today we will discuss such an attempt named M-Theory. We will also discuss how string theory explains blackhole, dark matter, dark energy, wormholes, etc. How to test the string theory? And many more things… But before that we need to know… What are branes?  String theory takes into account the 1-Dimensional strings but the M-theory takes branes into consideration. Branes are the fundamental basis of nature but with higher dimensions than strings. Branes can be any dimensional starting from 0 to 9 dimensions.  Branes can have electrical...
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expanding universe | will universe continue to expand? | how did we come to know universe is expanding? | Red shift | Doopler's effect

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Earth is the center of the solar system. Everything revolves around the earth. Yeah! You read this right. This was the view of humans about the solar system before the 15th century. Since then our knowledge have been improved a lot. We now know that there are billions of stars in the milky way galaxy, there are millions of galaxies in the universe, there are crores of different universe in the space, and lots of other things.  Almost a century ago, a discovery that shook the whole world and brought revolution in our understanding of  the universe was that,  universe is expanding. The discovery was too revolutionary. Albert Einstein’s theory of relativity predicted that universe must be expanding, but the idea of static universe was so popular that he introduced an antigravity force to avoid the predictions.  One big question which arises here is how do we know that universe is expanding? Humans have only been to the Moon and Our robotic missions are als...
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