3 bright stars in the Night sky

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PARADOXES- TWIN PARADOX

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  A very beautiful thought experiment is here you might be aware of, in this experiment either you or your twin will be getting old after time travel but you have to think that way. Yes very interesting it is!  Now just imagine, You let it be X and your brother which is twin let it be Y, you both are of the same age let say you both are 18.  You both are coming home from school, You reached home But your brother Y has a meeting with some Aliens which is on another planet outside of the solar system very strange! The planet your brother has to reach is 1 light-year from the planet Earth which Approximately 9.461e+12km. But your brother has a spacecraft having a very high speed greater than the speed of light. If we go there with a normal spacecraft having a normal speed less than the speed of light then the time required to reach there and return home is let's say 70 years.  If your brother reaches there and returns home after all work is done then at that time you X ...
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Evidences for the Dark Matter

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  Dark matter is known  as the “missing mass,” dark matter’s existence was first inferred by Swiss American astronomer Fritz Zwicky, who in 1933 discovered that the mass of all the stars in the Coma cluster of galaxies provided only about 1 percent of the mass needed to keep the galaxies from escaping the cluster’s gravitational pull.  In this blog we will discuss 5 different pieces of evidence for the existence of the dark matter  BENDING OF LIGHT Gravitational lensing:- The amount of bending is proportional to the mass of the object that causing the bending,  Light gets bent due to the mass of the object. In this image light from the distant galaxy is lensed due to galaxy clusters, so we get lensed images here on the earth. But we are getting an extra lensed image than usual but the Amount of bending is proportional to the mass of the object, so there is evidence of missing mass, We get the factor of the Dark matter here. We can derive the formula for this...
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Some Stars of the Ursa Major Constellation

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formally named  Alkaid   , is a star in the constellation of Ursa Major. It is the most eastern (leftmost) star in the Big Dipper (or Plough) asterism. Mizar   is a second-magnitude star in the handle of the Big Dipper asterism in the constellation of Ursa Major.  officially named  Alioth   , is, despite being designated "ε"   (epsilon), the brightest star in the constellation of Ursa Major
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