It’s often said that a picture is worth a thousand words, and the first images from the James Webb Space Telescope did not disappoint.
During a July 12 press conference, the world had a ringside seat to the most remarkable images of the universe ever taken.
In one hour, five images left us wanting more. This is only the tip of the cosmic iceberg.
The deep-field image (above) shows thousands of galaxies, including several that appear stretched out. This is not a disadvantage of the telescope. This is the distortion caused by gravity from a large foreground galaxy.
Einstein predicted this warping or warping of the fabric of space-time, similar to someone standing on a trampoline where the mat is warped. The larger the object, the greater the distortion of light.
To show the power of James Webb, the area of space where the deep-field image was taken was as small as a grain of sand held at arm’s length. This cluster is located 4.6 billion light years away. This is the time it took for light to reach us from the time when our sun and planets were slowly being formed from the solar nebula.
Launched on December 25, 2021, the powerful Ariane 5 rocket delivered the seven-ton James Webb Space Telescope into space, where it was deployed and gracefully continued its journey. It travels another 30 days to its final position (known as Lagrange 2), a point in space about 1.5 million kilometers from Earth (or about four times the Earth-Moon distance).
Gary Boyle
Unlike the Hubble Space Telescope — which launched in 1990 with a defective mirror, requiring a repair mission in 1993, outfitting it with corrective lenses — the James Webb is too far away for a service mission. Who knows if there will be such a mission down the road if necessary, but for now there are no plans to ever visit the telescope.
The $10 billion project is a collaboration between NASA, the European Space Agency and the Canadian Space Agency, along with private companies. Canada’s contribution is the Fine Pointing Sensor (FGS) used to point the massive telescope, as well as the Near Infrared Imaging Camera and the Slotless Spectrograph (NIRISS).
An apparent landscape of “mountains” and “valleys” fools the eye in this James Webb Space Telescope image of a young star-forming region in the Carina Nebula called NGC-3324. NASA/CSA/ESA/STScl
Thousands of people around the world worked on this project, which began in 1996. Then it was called the Next Generation Telescope. In 2002, the name was changed to the James Webb Space Telescope, after the man who was NASA’s administrator from 1961 to 1968. These were the early days of the Mercury, Gemini, and especially Apollo space programs.
Project Webb suffered redesign setbacks along the way (and the COVID-19 pandemic didn’t help matters). When completed, the 18 gold-plated hexagonal honeycomb mirrors had a total width of 6.5 meters, compared to Hubble’s 2.4 meter single mirror. This results in more light-gathering power along with its infrared ability to observe heat signatures through clouds of interstellar dust.
Another important part of the telescope is the solar shield, measuring the size of a tennis court. Composed of a lightweight material with special thermal properties, the five layers will provide a shield from the sun’s heat and light, as well as the heat of your own instruments, allowing the sensitive infrared connection to operate without interference. The mirror will operate at -223 degrees Celsius and the rest of the equipment at near absolute zero or -273 degrees Celsius.
The James Webb Space Telescope has opened a discovery news portal. In the wise words of Carl Sagan, “Somewhere, something incredible is waiting to be known.”
Will we someday glimpse the first stars and young galaxies dating back 13.8 billion years to the Big Bang that started our universe? Only time will tell.
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