The inventor of the 19th century set out to alter the course of history but instead traveled 800,000 years into the future, where he found humankind divided into two warring races. Several of you may already know this story, yes it's part of the sci-fi book Time Machine. But what exactly does the story mean? Can we travel back through time or can we travel into the future? How about in reality? Now let's explore time, the fourth dimension.

It is obvious that everyone will think of science fiction books like The Time Machine or some kind of series when they hear of time travel paradox,  where the lead characters travel to the future to change the bad faith of their loved ones or maybe rewind the clock to change the things that affect the entire planet. 

Until now, time travel has only existed in fantasy virtual worlds, but science innovations are making it true in the real world. With NASA's new James Webb Space Telescope (JWST), we can peer back into the past to see stars and galaxies that formed billions of years ago.

Surely now you are trying to connect the science fiction book you read with JWST and having more questions about its basics!

Start with the JWST research team's building blocks.

  1. It takes us back to the origin of the universe, that is, Analyzing the first light emitted after the Big Bang, the most accepted definition of the origin of the universe.

  2. Stars, galaxies, and planets are formed from the explosion of small-massed but high-temperature bodies. Providing a better understanding of how galaxies form and organize.

  3. From random explosions came planets! An exploration of the early stages of star and planet formation.

  4. Mars and the moon are currently being studied as potential places for life to survive. The discovery of other planetary systems that may have the chemical ingredients necessary to support life (including celestial objects within our own Solar System)

Traveling back in time and how it works!

It may seem difficult to understand at first glance, but it isn't a stone that can't be broken if you just speak simply and understandably. 

Space travel at a speed of 300,000 kilometers per second (or 186,000 miles per second). Using this speed, the travel time between the sun and earth is about eight minutes. Therefore we aren't actually seeing the sun, we are seeing an 8 minute older son.

A closer look begins with the knowledge that many stars are approximately light-years away from the earth, and the moon is about 239,000 miles (390,000 km) away from the planet. So the light travels to Earth in about 1.3 seconds and As we gaze toward the sky, we see the Moon 1.3 seconds earlier. Similarly, the light from Proxima Centauri, which is 4.2465 light-years away, is about four years old in real-time. Using the JWST telescope, we will observe stars tens of millions of light-years away. As a result of this theory, we would probably be able to see dinosaurs if we stood 65 million light-years away and looked down at Earth.

How far back we can see with JWST

JWST is a state-of-the-art invention. It contains gold-plated mirrors and a sunshade the size of a tennis court, which enables it to detect light from far galaxies. Thus, with the help of this telescope, we might be able to see what the universe looked like after its creation 13.5 billion years ago.

In what way will JWST work?

The JWST has a mirror that is about 6.5 meters (19.3 feet) in diameter and is made up of 18 hexagonal mirrors. Larger mirrors allow for more light to be captured. Unlike other telescopes, JWST is more sensitive, capable of capturing longer wavelengths, and each small mirror contains gold foils that reflect infrared radiation.

What makes James Webb's telescope better than Hubble's

Scientists believe that JWST will be 100 times as powerful as Hubble. The JWST will revolutionize our view of space. As it can be positioned farther away from Earth than a Hubble, its highly advanced technology allows it to travel 1.5 million kilometers or one million miles to Earth's outer gravitational field. About the same as four lunar trips one-way.

JWST's advantages over other telescopes, particularly Hubble.

In its 3 decades of existence, the Hubble telescope has discovered numerous planets, moons, and galaxies, expanded knowledge of nebulae, and developed estimation of the age of the universe. However, despite its advantages, it has some limitations that hold back research.

Has the James Webb space telescope been launched yet, from where it has launched?

JWST successfully launched as scheduled before at 12:20 UTC on 25th December 2021 on an Ariane 5 rocket from the French Guiana space center. Since this location is strategic as it lies by the Equator, where earth spin gives an extra push to traveling rockets. after the successful launch, NASA administrator Bill Nelson termed it "a great day for planet Earth".  

When we can see the magic of JWST, the unfolding of hidden galaxies, and the universe altogether

As the motive behind JWST is to reach farther parts of the universe, in order to achieve this JWST should be lighter in weight, so the NASA team used materials like beryllium and using folding mechanisms to save space. All these new works should undergo observation and correction process before JWST reaches a greater height, so the early 28 days where it unfolds and expands its mirror and sun-shield are the most important days for successful JWST. During these days, the telescope will send preliminary images to NASA maybe by the end of January 2022. By observing these images NASA team checks the correctness of light captured by the primary mirror. So it will be the observation period where we won’t be able to see much. So we may predict that NASA will release the first scientific quality images by the end of March 2022, and in June 2022 full mission operations will begin.

JWST will be going to be a new opportunity to look forward and backward, giving scientific tone imagination.

Do you like to travel in time?

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