A Supernova is said to be an explosion of star that takes place at the end of a star’s life cycle ie. the star has reached the end of its life. It is said to be the largest explosion in the space with a lot of impact. Scientists say that the Supernovas are difficult to be seen with a naked eye in Milky Way Galaxy because of the dust and the pollution that blocks our way. The last time Supernova was seen in The Milky Way Galaxy was back in 1604 by Johannes Kepler. Studies suggest that the remains of a more recent supernova that exploded in the Milky Way more than a hundred years ago was discovered with the help NASA’s Chandra telescope. Studies say that a Supernova shines with the brightness of 10 billion suns and that the total energy output of a Supernova may be 1044 joules.

What causes a Supernova?

An article on Supernova in the “NASA KNOWS SERIES” was written for students to study and know more about Supernova which tells us that a Supernova happens due to change in core or center of a star. It says that a change could be occurring in two different ways both of which cause a Supernova.

Types of Supernova: There are two types of Supernova.

  1. The first type of supernova happens in binary star systems. Binary stars are two stars that orbit the same point. One of the star scientifically called as the “white dwarf” which is near the end of its life that has used most or all of its nuclear fuel and collapsed into a size similar to Earth, steals matter from other star ie. the second star of the orbit. Eventually, the the star ending it’s life accumulates too much matter. Having too much matter causes the star to explode, resulting in a supernova.

      2. The second type of supernova occurs at the end of a single star’s lifetime ie.,it doesn’t need another star or it’s companion star to happen, it happens on it’s own. Studies say that in the second type of Supernova the star runs out of nuclear fuel and thus as a result some of its mass flows into its core resulting in the core becoming so heavy because of the flow of the mass into it that it cannot withstand its own gravitational force. The core collapses, which results in the giant explosion of a supernova. You must be wondering that even The sun is a single star but it doesn’t explode the answer to your question is that in spite of having a mass of 1.989 x 1030 kg it still does not have enough mass to become a supernova.

It is said that scientists study Supernova since it tells them about the Universe how big it is and the rate at which it is expanding. It also tells the scientists that Supernova leaves elements and debris into the space thus playing an important role in distribution of elements throughout the Universe

 Dimple Wadhwa