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NASA James Webb Space Telescope (JWST) Looks Back In Time! - Learn How From Nobel Prize Winner

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The James Webb Space Telescope revealed much about space with its first images and data. However, it is only just beginning its exploration of space. 

NASA informed Dr John Mather, the observatory's senior project scientist, who has worked towards this milestone for over 25 years. 

NASA's official Twitter account stated, 'Letting go of the past is not one of Dr John Mather's strong suits. But, on the other hand, he's been awarded a Nobel Prize. 

So Mather, @NASAWebb's senior scientist for @NASAGoddard, is shifting the focus from the past to the present.

It is known that Dr Mather was the first to create a baby picture of the universe. 

This spacecraft provided the best evidence that the universe started with the Big Bang explosion. So Dr John Mather told Jim Green, NASA's interplanetary talkshow Gravity Assist.

Dr Mather gave a brief history of COBE. "COBE was originally the Cosmic Background Explorer satellite and was first proposed in 1974 to measure the Big Bang. 

What does it mean to measure and record the Big Bang? It measures the cosmic microwave background radiation that fills the universe. 

It is evidence of the conditions in the earliest moments. Task number one: Is it the right colour? 

Is it colourless because it matches a theoretical curve known as a black body spectrum? It is. Is it the same in all directions? The answer is not exactly, but it's close. 

This is important because the hot and cold areas we see on the map are interpretable to mean that they come from the Big Bang. 

He added that they created a universe that wasn't exactly uniform and smooth, and we are here because of it.

He also explained that Stephen Hawking stated that the map was the most important scientific discovery ever made in the past century.

James Webb could answer the question when Dr Mather was asked about what was happening in the early universe. 

Dr Mather replied, "Well, the Webb telescope does not look back in time, but it does look at distant objects." It takes light a while to reach there. 

We can also look back at the beginning but not all the way. If nature gives us something to look at, we should be able to see it within 50 to 100 million years of the expansion. 

These primordial objects can only be predicted at this moment. They have never been seen. We built the Webb telescope to see if they were there.

He said, "By and large when we talk about the size, the universe itself is probably infinite. So it doesn't possess a size." 

We can only see a portion of the universe that is 13.7 billion or 13 point eight billion light-years wide. 

This was either when the light was first sent to us. That's the tricky part, too. Because everything has been changing and moving since the light arrived, it isn't easy to see.

"Nevertheless, as Webb telescope operators, our job is to look back to that time and into the Cosmic Dark ages to find the first luminous objects to have formed from that primordial material. 

They could have been stars or galaxies. But before stars formed, they could also have been black holes. There are stories about how black holes could be created from primordial material. 

It is even possible to see some remnants of the big bang. However, we have never seen any evidence of them, even though nobody has solved the problem. 

What about this? He said that the number one objective of cosmology is to "see back as far as time can be seen."