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Post by 特斯拉 on Jul 11, 2022 21:39:10 GMT -5
NASA’s James Webb Space Telescope has produced the deepest and sharpest infrared image of the distant universe to date. Known as Webb’s First Deep Field, this image of galaxy cluster SMACS 0723 is overflowing with detail. Thousands of galaxies – including the faintest objects ever observed in the infrared – have appeared in Webb’s view for the first time. This slice of the vast universe covers a patch of sky approximately the size of a grain of sand held at arm’s length by someone on the ground.This deep field, taken by Webb’s Near-Infrared Camera (NIRCam), is a composite made from images at different wavelengths, totaling 12.5 hours – achieving depths at infrared wavelengths beyond the Hubble Space Telescope’s deepest fields, which took weeks. The image shows the galaxy cluster SMACS 0723 as it appeared 4.6 billion years ago. The combined mass of this galaxy cluster acts as a gravitational lens, magnifying much more distant galaxies behind it. Webb’s NIRCam has brought those distant galaxies into sharp focus – they have tiny, faint structures that have never been seen before, including star clusters and diffuse features. Researchers will soon begin to learn more about the galaxies’ masses, ages, histories, and compositions, as Webb seeks the earliest galaxies in the universe. This image is among the telescope’s first-full color images. The full suite will be released Tuesday, July 12, beginning at 10:30 a.m. EDT, during a live NASA TV broadcast. Learn more about how to watch.
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Post by 特斯拉 on Jul 18, 2022 12:46:02 GMT -5
Did the Webb Space Telescope show us the face of God?How infinitesimally small are we? We are so small our brains lack the processing power to answer the question. So small that on Monday morning we attended to the mundane, the things our primitive minds could manage: Eggs for breakfast, food and water for the dog and then, at the very outer edges of our comprehension, $5.50 for a gallon of gas. Then came news of something we can never fully comprehend, an image so astonishing it provokes the biggest questions: “Who are we?” “Where are we?” “Are we alone?” “Is there a God?”
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Post by 溪山 on Jul 18, 2022 19:38:27 GMT -5
“Are we alone?" --- Pioneer plaque: The Pioneer plaques are a pair of gold-anodized aluminum plaques that were placed on board the 1972 Pioneer 10 and 1973 Pioneer 11 spacecraft, featuring a pictorial message, in case either Pioneer 10 or 11 is intercepted by intelligent extraterrestrial life. The plaques show the nude figures of a human male and female along with several symbols that are designed to provide information about the origin of the spacecraft. Pioneer plaque : The golden plaque was the brainchild of Carl Sagan who wanted any alien civilization who might encounter the craft to know who made it and how to contact them. Pioneer 10 is heading towards the star Aldebaran in the Taurus constellation and will take more than two million years to reach it. Pioneer 11 is headed toward the constellation of Aquila (The Eagle), Northwest of the constellation of Sagittarius. Pioneer 11 will pass near one of the stars in the constellation in about 4 million years.
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Post by 边 草 on Jul 18, 2022 22:05:31 GMT -5
不知道是在何时,我印象里有点知道这个事情,飞船上好像还带了巴赫音乐的录音呢。
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Post by 溪山 on Jul 19, 2022 0:00:33 GMT -5
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Post by 边 草 on Jul 19, 2022 9:40:08 GMT -5
哇,这真是指哪打哪,厉害!
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Post by 溪山 on Jul 25, 2022 0:10:08 GMT -5
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