webb
Washington (AFP) - European astronomers using the James Webb Space Telescope have detected a previously unknown asteroid about the size of Rome's Colosseum in the main asteroid belt between Mars and Jupiter. The asteroid measuring between 300 and 650 feet (100 to 200 meters) in length is the smallest object observed to date using the telescope, the US space agency NASA said Monday. The European astronomers "serendipitously detected" the asteroid, NASA said in a statement, adding that more observations would be needed to better characterize its nature and properties. "We -– completely unexpecte...
AFP
Washington (AFP) - The first galaxies may have formed far earlier than previously thought, according to observations from the James Webb Space Telescope that are reshaping astronomers' understanding of the early universe. Researchers using the powerful observatory have now published papers in the journal Astrophysical Journal Letters, documenting two exceptionally bright, exceptionally distant galaxies, based on data gathered within the first few days of Webb going operational in July. Their extreme luminosity points to two intriguing possibilities, astronomers on a NASA press call said Thursd...
AFP
Washington (AFP) - The James Webb space telescope has taken its first image of an exoplanet -- a planet outside our solar system -- as astronomers hail the device's performance since its launch last year. Images from the most powerful space telescope ever built have thrilled observers in recent months as it orbits the Sun a million miles (1.6 million kilometers) from Earth. Its latest pioneering pictures show the exoplanet, called HIP 65426 b, is a gas giant with no rocky surface and could not be habitable. "This is a transformative moment, not only for Webb but also for astronomy generally," ...
AFP
Washington (AFP) - The James Webb space telescope has revealed dazzling new detail of a previously known slice of the cosmos 32 million light-years away, in a new picture released by NASA and the European Space Agency (ESA). The infrared technology of the telescope, launched in December 2021, has allowed for an even clearer view of the so-called Phantom Galaxy than astronomers had ever seen before. "Webb's sharp vision has revealed delicate filaments of gas and dust in the grandiose spiral arms which wind outwards from the center of this image," NASA and the ESA said Monday. "A lack of gas ...
AFP
【▲ 図1: ジェイムズ・ウェッブ宇宙望遠鏡が6つの波長で捉えた褐色矮星「GLASS-JWST-BD...
sorae
Washington (AFP) - NASA's James Webb Space Telescope has captured stunning images of the planet Jupiter showing two tiny moons, faint rings and auroras at the northern and southern poles. "We hadn't really expected it to be this good, to be honest," said planetary astronomer Imke de Pater of the University of California, Berkeley. "It's really remarkable that we can see details on Jupiter together with its rings, tiny satellites, and even galaxies in one image," she said. De Pater headed the observations of Jupiter, the largest planet in our solar system, with Thierry Fouchet of the Paris Obse...
AFP
【▲ ジェイムズ・ウェッブ宇宙望遠鏡が撮影した「車輪銀河」。近赤外線カメラ「NIRCam」と中間赤外...
sorae
この宇宙では、光の速さはあらゆる速度の上限です。私たちが観ている天体の光もこの制限を受けるため、今こ...
sorae
Washington (AFP) - Just a week after its first images were shown to the world, the James Webb Space Telescope may have found a galaxy that existed 13.5 billion years ago, a scientist who analyzed the data said Wednesday. Known as GLASS-z13, the galaxy dates back to 300 million years after the Big Bang, about 100 million years earlier than anything previously identified, Rohan Naidu of the Harvard Center for Astrophysics told AFP. "We're potentially looking at the most distant starlight that anyone has ever seen," he said. The more distant objects are from us, the longer it takes for their ligh...
AFP
【▲ ジェイムズ・ウェッブ宇宙望遠鏡が科学観測で取得した高解像度赤外線画像の数々(Credit: N...
sorae
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