![]() NASA Earth Observatory images by Allison Nussbaum, using Landsat data from the U.S. However, the report noted that flooding is easing and the river should soon dip below the minor flood level. For a list of all missions, visit the missions A-Z page. On May 1, 2023, the bureau still had a minor flood warning in place for the town of Birdsville, about 130 kilometers (80 miles) downstream of these images. NASA Images Mission Galleries View images from our missions exploring the universe and our home planet. Recent observations and the three-month streamflow forecast, from Australia’s Bureau of Meteorology, show levels near or slightly above the median, relative to historical records. ![]() Most is lost to evaporation and transpiration along the way. Floodwaters have yet to flow that far this year, and it’s uncertain if there will be enough water to reach the lake. The Diamantina River has historically provided 75 percent of the lake’s water. “Sometimes it looks like the river channels just disappear, but when these systems are in flood, the connection between the channels and the surrounding landscape is finally revealed.”Ībout every eight years, rivers in the basin reach Lake Eyre. “They are ubiquitous in Australia,” said Polanco. As water flows through the troughs, it forms several small delta-like features, which some researchers refer to as floodouts. ![]() Here, some of the floodwaters divert into north-northwest trending ridges that are part of a fossil landscape of wind-formed dunes. In contrast to the channels of braided rivers, which shift around within the riverbed, the many channels in anabranching rivers are hemmed in by semi-permanent islands stabilized by vegetation.Ī detailed look at the lower-right portion of the wide view reveals other notable features. This image from NASAs Mars Reconnaissance Orbiter on April 8, 2015, catches sight of NASAs Curiosity Mars rover passing through a valley called Artists Drive on the lower slope of Mount. to find appropriate and fresh material from NASA in one place every day. The wide view (top) shows a textbook example of an anabranching river, according to Sara Polanco, an expert in landscape dynamics and a lecturer at The University of Sydney. Image pages show the full-screen image with the complete caption from the feed in a. A similar pulse of green is visible in images acquired in 2018. In this configuration, bare earth appears brown or reddish, vegetation is green, and sediment-laden water and saturated soil are shades of blue.īursts of vegetation growth that tend to follow in the wake of the floodwaters appear to be cropping up. The images combine the shortwave infrared, near infrared, and red light (OLI bands 7-5-4). The Operational Land Imager (OLI) on Landsat 8 captured the images on April 7, 2023, as floodwaters from rainfall in February and early March flowed through the Diamantina River catchment. These false-color images illuminate the results of this phenomenon. However, seasonal rainfall sends water coursing through its channels and transforms the otherwise parched landscape. It is one of several rivers in the Lake Eyre Basin, which is situated in Australia’s desert interior and drains approximately 15 percent of the continent.įor much of the year, its beds remain dry. The Diamantina River in Australia runs southwest from northern Queensland toward Lake Eyre (Kati Thanda) in South Australia-the lowest point on the continent. The field of view is about 30 arcseconds across.Today’s story is the answer to the April 2023 puzzler. The total exposure times were 1400 s, 360 s and 260 s respectively. The green layer of the image, which shows the stars well, was taken through a broader yellow filter (F555W). The blue glow comes from ionised oxygen and was recorded through a green filter (F502N). The red light was captured through a filter letting through the glow from hydrogen gas (F658N). This picture was created from images taken using the Hubble Space Telescope’s Wide Field Planetary Camera 2. The vivid red and blue hues in this image come from the material glowing under the action of the fierce ultraviolet radiation from the still hot central star. Eventually some of this outflung material may form new stars and planets. Planetary nebulae are one of the main ways in which elements heavier than hydrogen and helium are dispersed into space after their creation in the hearts of stars. This object is located in the constellation of Ara, the Altar, about 11 000 light-years from Earth. Sometimes this ejection results in elegantly symmetric patterns of glowing gas, but NGC 6326 is much less structured. When a star ages and the red giant phase of its life comes to an end, it starts to eject layers of gas from its surface leaving behind a hot and compact white dwarf. The Hubble Space Telescope captured this beautiful image of NGC 6326, a planetary nebula with glowing wisps of outpouring gas that are lit up by a central star nearing the end of its life.
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