What is James Webb doing at Space? L2 Point /Time Travel/Glimpse of History/JWST SUCCESS/ Big Bang/NASA/ Science Exploration

  This is the 2nd Blog I am writing about JWST. I think the previous blog was so interesting that I wanted to post a Blog. Lets Begin ;

What is the actual mission of JWST?

NASA says the James Webb Space Telescope will be “a giant leap forward in our quest to understand the Universe and our origins”, as it will examine every phase of cosmic history: from the Big Bang to the formation of galaxies, stars, and planets to the evolution of our own Solar System.

The science goals for the Webb can be grouped into four themes. The first is to look back around 13.5 billion years to see the first stars and galaxies forming out of the darkness of the early universe. Second, to compare the faintest, earliest galaxies to today’s grand spirals and understand how galaxies assemble over billions of years. Third, to see where stars and planetary systems are being born. And fourth, to observe the atmospheres of extrasolar planets (beyond our solar system), and perhaps find the building blocks of life elsewhere in the universe. The telescope will also study objects within our own Solar System.

The JWST will be able to see right through and into massive clouds of dust that are opaque to earlier generation visible-light obs
ervatories like the Hubble Telescope. Another difference is that the Webb is equipped with cameras and other instruments sensitive to infrared or “heat” radiation, and the Hubble is not. The expansion of the universe causes the light that would normally be in wavelengths that are visible to be shifted to longer infrared wavelengths, normally invisible to human eyes, The New York Times said in a report.

  

 

How the increment of Quality begin

 I have talked about James Web. Its structure Mechanism, things attached to it to built.

 Continuing from the 1st one.

  

 James Webb's technology can be considered the best technology ever made with such an enormous amount.

Continuing.....

 

 Hubble is close to the earth and orbit around it.

 But this will be deployed  1.5 km away from the earth

 Deployed in L2 point L stand for Lagrange point.

 The point will be on the other side of the sun Because obviously, it is important to block the heat and light of the sun as much as possible for the better functioning of the telescope.

     

   And the L2 point is special because it keeps evolving with earth so it hides the sun throughout the Revolution.

 

 Earth shadow will keep the sun hide hidden.

  NASA has said that the entire procedure of creating and launching it is so complicated that they have identified more than 300 potential problems that may arise.

More than 300than  single points are failures than failures; if any of them came true, the entire project would be a good source.

  

$10 billion has been spent on this project. This huge amount is so huge that NASA has to defund several research projects and direct the money to this project to make it possible.

  Who takes part in this project?

  Besides NASA Canadian Space Agency is also participating in this.

The Scientists have pinned their hopes that using this they would be able to study how did stars and galaxies form after Big Bang.

 As I took before up in the articles we can literally look 13 billion years into the past.

     

The Hubble Space Telescope could look only 1 Billion years after Big Bang took place.

   As you can see in a Diagram.

  

  You would ask how it is possible to look into the past.

 The answer to it is very simple.

 

  The light takes some time to travel the distance and by the time light reaches from one place to the other, a lot of time would have passed.

 Especially, when it involves distance the large.

 The light from the sun reaches the earth by traveling approximately 8 minutes.

  It means that if the sun vanishes, for eg it will take 8 minutes for people to find out on earth to see that the sun has disappeared.

 In a way, we can say that we are looking 8 minutes into the past when we see the sun.

Similar logic we will apply on a big scale.

 The stars and galaxies are millions of light years away from us.

When we look at them through the telescope or we gazed at the stars from the earth, we are actually seeing them as they were millions of light years ago.

  

More Info about JWST

WAVELENGTH: Webb’s four instruments to capture images and spectra of astronomical objects will provide wavelength coverage from 0.6 to 28 microns (the infrared part of the electromagnetic spectrum is from about 0.75 microns to a few hundred microns); the instruments on Hubble can observe mainly in the ultraviolet and visible parts of the spectrum from 0.1 to 0.8 microns. Infrared observations are important because light at this wavelength can penetrate the dust that shrouds newly formed stars and planets, and make them visible.

SIZE: Webb’s primary mirror is approximately 6.5 metres in diameter, giving it a significantly larger collecting area than the mirrors of the current generation of space telescopes. Hubble’s mirror has a diameter of 2.4 metres, which means Webb’s collecting area is around 6.25 times that of Hubble’s. Webb will cover more than ~15 times the field of view covered by Hubble’s NICMOS camera. Webb’s sunshield is about 22 m by 12 m, a little less than the size of a tennis court.

 The universe is so huge that there are stars that are 13 billion light years away from us; by the time their light reaches earth, 13 billion years would have elapsed, and what we get to see today, are the events 13 billion years ago.

This way we can get a Glimpse of history.

 

 With this logic,

 Theoretically, it is also possible that if we go 100 million light years away from the earth.

 We teleport a planet that is  100 million light years away from the earth.

And on that planet are building a very powerful telescope and look at the earth we will get to see the earth as it was 100 million years ago.

 We will get to see dinosaurs!

 

 But the practical problem with doing this is that by the time we go to the other planet and look back at earth it will take as much longer time to reach the other planet and took  So we can do time travel back to the past it will take much longer time to reach another planet than the year that we can look back to.

 

 James Webb can't find a planet with earth-like conditions.

 Where life can be possibly found.

     TIME WILL TELL.