1/1/2024 0 Comments Nasa images by date![]() ![]() The dry season in central Africa spans roughly May through September, with fire season peaking in July through August.ġkm (596.2 KB), 500m (1.8 MB), 250m (5. In the dry season, they set fires to clear brush and dead vegetation from farm and grazing land and to deal with household trash. People in Africa have used fire for hundreds, possibly thousands, of years as an agricultural and land management tool. The widespread nature of the fires, their location, and the time of year all suggest that people are intentionally setting most of these fires for agricultural purposes. Each red “hot spot” marks an area of actively burning fire, and they are abundant in Zambia (east), Democratic Republic of Congo (north and central), and Angola (west). The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite acquired a true-color image spanning the continent from Lake Tanganyika to the Pacific Ocean. These new observations from the Webb telescope “are just a hint at what this observatory will add to Saturn’s story in the coming years,” NASA says, “as the science team delves deep into the data to prepare peer-reviewed results.Many hundreds of fires dotted central Africa in early June 2023. In the future, additional and deeper exposures from Webb will help astronomers examine fainter rings around Saturn, according to NASA. Over the years, Saturn’s atmosphere and rings have been observed by other missions such as NASA’s Pioneer 11, Voyagers 1 and 2, the Cassini spacecraft and the Hubble Space Telescope. This latest detailed image comes just weeks after the Webb telescope spotted a record-breaking water plume erupting from Saturn’s moon Enceladus, which feeds Saturn’s diffuse E ring, according to NASA. What did Hubble look at on your birthday Enter the month and date below to find out Then share the results with your friends on social media using Hubble30. Time moved in slow motion during the early days of the universe This affects the entire galaxy as the material snowplows into surrounding gas and dust. The "quasar winds" are propelling hundreds of solar masses of material each year. Using the unique capabilities of Hubble, astronomers have discovered that blistering radiation pressure from the vicinity of the black hole pushes material away from the galaxy's center at a fraction of the speed of light. A quasar emits exceptionally large amounts of energy generated by a supermassive black hole fueled by infalling matter. This illustration shows a distant galaxy with an active quasar at its center. Launched on Christmas Day in 2021, Webb can study the beginning of time more closely, hunt for unobserved formations among the first galaxies, and peer inside dust clouds where stars and planetary systems are currently forming. The brightening near the edge of Saturn’s disk might be due to high-altitude methane fluorescence (the process of emitting light after absorbing light) or emissions in the planet’s ionosphere or both. But the darker-than-usual appearance of the northern hemisphere could be from “an unknown seasonal process affecting polar aerosols in particular,” NASA says. Unexpectedly, “the large, diffuse structures in the northern hemisphere do not follow the planet’s lines of latitude, so this image is lacking the familiar striped appearance that is typically seen from Saturn’s deeper atmospheric layers,” according to NASA.ĭifferences in the looks of Saturn’s northern and southern poles are normal, according to NASA, as the northern region experiences summertime while the southern hemisphere is exiting winter darkness. ![]() These exposures test Webb’s ability to spot faint moons around the planet and its rings, since any newly discovered moons could help scientists better understand Saturn’s present and past systems. ![]() The image was taken with Webb’s Near-Infrared Camera, known as NIRCam, as part of a Webb program that involves several exceptionally deep exposures of Saturn, according to NASA. The near-infrared observations of the ringed planet are a first for the highly sensitive telescope, according to NASA - which, at 1.5 million kilometers (nearly 932,000 miles) from Earth, observes the universe with wavelengths of light longer than those of other space telescopes. ![]()
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