Sunday, June 4, 2023

NASA: A look at the new space telescope that should be sending images back to Earth soon

let’s see what’s out there

NASA’s James Webb Space Telescope is the world’s largest and most complex in history and is expected to send images back to Earth this week.

The revolutionary technology of the James Webb Space Telescope will study all phases of cosmic history, from the interior of our solar system to the most distant observable galaxies in the early universe.

Webb’s Infrared Telescope will explore a wide range of scientific questions to help us understand the origins of the universe.

Science Objectives:

  • First light and reionization
  • first galaxies in the universe
  • How galaxies evolve
  • Birth of stars and planets.
  • exoplanets


  • near infrared camera
  • near infrared spectrograph
  • mid-infrared instrument
  • Narrow-infrared imager and slitless spectrograph with fine guide sensor

Webb is an international collaboration between NASA and its partners, the European Space Agency and the Canadian Space Agency.

Thousands of engineers and hundreds of scientists worked to make Webb a reality, along with more than 300 universities, organizations, and companies from 29 US states and 14 countries.

Development began in 1996 for a release initially planned for 2007 with a budget of $500 million. There were many delays and cost overruns, including a major redesign in 2005, a broken sun visor during a practice deployment, recommendations from an independent review board, a threat from the US Congress to cancel the project, the COVID-19 pandemic. 19 and problems with the telescope.

Construction was completed in late 2016, followed by years of extensive testing prior to launch. The total cost of the project is expected to be around $9.7 billion.

Some Webb developments have had indirect benefits. One example helps surgeons performing LASIK eye surgery: Engineers developed a technique to accurately and quickly measure mirrors to guide their grinding and polishing.

Since then, this technology has been adapted to create high-definition maps of patients’ eyes to improve surgical precision.

The observatory has a temperature range of -390 degrees Fahrenheit on the inner shell to 260 degrees on the outer shell. It will work at about -370 degrees.

Nasa: a look at the new space telescope that should be sending images back to earth soon

Webb will look back in time when the universe was young, more than 13.5 billion years ago, a few hundred million years after the big bang theory, to search for the first galaxies in the universe.

Webb is so sensitive that it could theoretically detect a bumblebee’s heat signature at a distance from the moon.

Why infrared?

Webb will study infrared light from celestial objects with much greater clarity and sensitivity than ever before.

Unlike the tight, short wavelengths of visible light, the longer wavelengths of infrared light slip through dust more easily.

Thus, the star- and planet-forming universe hidden behind the dust clouds appears clearly to the view of Webb’s infrared instruments.

Nasa: a look at the new space telescope that should be sending images back to earth soon

Nasa: a look at the new space telescope that should be sending images back to earth soon Timeline: Significant Events in Telescope History

1608 — German-Dutch eyeglass maker Hans Lippershey applies his patent on what is now known as a telescope. He managed to beat two other Dutch scientists (Jacob Metius and Zacharias Janssen) who also tried to register their own inventions.

1611 — The name “telescope” was created by the Greek mathematician Giovanni Demisiani, during his visit to the Italian science academy “Accademia dei Lincei” which housed one of Galileo Galilei’s telescopes. This word was coined from the words “tele” (far) and “skopein” (to look or see).

The oldest Observatory in America is located in Bogotá, Colombia (1803).

1970 — First telescope launched into space aboard the Uhuru probe. This was also the first gamma-ray telescope to be used.

Since 1970, NASA and ESA have launched more than 90 space telescopes into orbit. An average of 2 per year. Some are longer than others. 61 are no longer active, 26 are still active.

1975 — BTA-6 is the first major telescope to use an altazimuth mount, which is mechanically simpler but requires computer control for precise pointing.

1990 — Hubble Telescope launched into Earth orbit. It quickly became one of the most famous and important telescopes ever built.

World Nation News Desk
World Nation News Desk
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