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Signs of Katrina Linger in the Marshes: Ten years after making landfall, scars from Hurricane Katrina still linger. And not just in the blighted houses that mar some neighborhoods. The marshes and swamps that buffer New Orleans from the Gulf of Mexico still show evidence of Katrine's wrath. The wetlands surrounding Delacroix, a fishing town to the southeast of New Orleans, were some of the hardest hit by the hurricane. Pounding surf, driving winds, and a potent storm surge transformed the marshes by picking apart mats of dead grass, stirring up and disbursing soft underlying sediments, scouring several new channels, and depositing leftover sediment and debris in new areas. Katrina delivered a massive surge of water that dramatically enlarged lakes, including Lake Lery and Petit Lake. It also scoured new channels and widened canals in ways that eliminated large amounts of marshland. As seen in the 2015 image, flood-damaged vegetation has returned to its normal color, but the enlarged waterways have persisted. NASA Earth Observatory images by Jesse Allen, using Landsat data from the U.S. Geological Survey. #nasa #hurricane #katrina #space #earth #earthrightnow #science #neworleans #hurricanekatrina #katrina10 #katrina10yearslater; -
This star cluster, NGC 1783, is thought to be less than one and a half billion years old - which is very young for globular clusters, which are typically several billion years old. During that time, it is thought to have undergone at least two periods of star formation, separated by 50 to 100 million years. First observed by John Herschel in 1835, the cluster of stars is nearly 160,000 light-years from Earth, and has a mass around 170,000 times that of the sun. Globular clusters are dense collections of stars held together by their own gravity, which orbit around galaxies like satellites. The image clearly shows the symmetrical shape of NGC 1783 and the concentration of stars towards the center, both typical features of globular clusters. Image credit: ESA/Hubble & NASA, Acknowledgement: Judy Schmidt #nasa #hubble #hst #hubble25 #space #nasabeyond #astronomy #science; -
With the ability to now send vertical images, we want to show you the world. Here's a look at the Earth from the International Space Station (@ISS) shared by European Astronaut Samantha Cristoforetti. When she shared this view from orbit 250 miles up, she wished everyone "Good night from space" in English & Italian on May 14, 2015. Image credit: NASA/ESA #nasa #space #spacestation #internationalspacestation #earth #spaceviews #astronaut #bluemarble #planet #thinkoutsidethesquare; -
We are explorers. Our vision is to reach for new heights and reveal the unknown so that what we do and learn will benefit all humankind. And for over 25 years, our Hubble Space Telescope has been revealing the unknown cosmos. Hubble is peering into the farthest reaches of the universe and back to its earliest moments of existence, helping us understand the universe's origin, evolution and destiny. Hubble continues to explore as we develop its successor, the James Webb Space Telescope, which will capture light from the universe's earliest stars. Credit: NASA #nasa #nasabeyond #hubble #hst #space #hubble25 #astronomy #nebula #science #thinkoutsidethesquare; -
Astronomers have found evidence for a faded electron cloud “coming back to life,” much like the mythical phoenix, after two galaxy clusters collided. This “radio phoenix,” so-called because the high-energy electrons radiate primarily at radio frequencies, is found in Abell 1033. A galaxy cluster consists of hundreds or even thousands of individual galaxies, unseen dark matter, and huge reservoirs of hot gas that glow in X-ray light. This system is located about 1.6 billion light years from Earth. Astronomers think that the supermassive black hole close to the center of Abell 1033 erupted in the past. Streams of high-energy electrons filled a region hundreds of thousands of light years across and produced a cloud of bright radio emission. This cloud faded over a period of millions of years as the electrons lost energy and the cloud expanded. This new portrait of the radio phoenix is captured in this multiwavelength image of Abell 1033. X-rays from Chandra are in pink and radio data from the VLA are colored green. The background image shows optical observations from the SDSS. Image credit: X-ray: NASA/CXC/Univ of Hamburg/F. de Gasperin et al; Optical: SDSS; Radio: NRAO/VLA #nasa #space #galaxy #galaxies #astronomy #xray #stars #blackhole #chandra;
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Aboard the International Space Station (@ISS) this morning, Astronaut Kimiya Yui of the Japan Aerospace Exploration Agency (JAXA) successfully captured JAXA’s Kounotori 5 H-II Transfer Vehicle (HTV-5) at 6:28 a.m. EDT. The HTV-5 is delivering more than 8,000 pounds of equipment, supplies and experiments in a pressurized cargo compartment. The unpressurized compartment will deliver the 1,400-pound CALorimetric Electron Telescope (CALET) investigation, an astrophysics mission that will search for signatures of dark matter and provide the highest energy direct measurements of the cosmic ray electron spectrum. Astronaut Scott Kelly (@StationCDRKelly) shared this image of the HTV-5 and Canadarm2, which reached out and grappled the cargo spacecraft. Image credit: NASA #htv5 #spacestation #nasa #space #earth #iss #internationalspacestation; -
Looking Up at Mars Rover Curiosity (@MarsCuriosity) in 'Buckskin' Selfie: This low-angle self-portrait of our Curiosity Mars rover shows the vehicle at the site from which it reached down to drill into a rock target called "Buckskin" on lower Mount Sharp. The selfie combines several component images taken by Curiosity's Mars Hand Lens Imager (MAHLI) on Aug. 5, 2015, during the 1,065th Martian day, or sol, of the rover's work on Mars. For scale, the rover's wheels are 20 inches (50 centimeters) in diameter and about 16 inches (40 centimeters) wide. A close look reveals a small rock stuck onto Curiosity's left middle wheel (on the right in this head-on view). MAHLI is mounted at the end of the rover's robotic arm. For this self-portrait, the rover team positioned the camera lower in relation to the rover body than for any previous full self-portrait of Curiosity. This yielded a view that includes the rover's "belly." Credit: NASA/JPL-Caltech/MSSS #nasa #mls #mars #marscuriosity #space #planet #nasabeyond #selfie #science; -
Here we see the spectacular cosmic pairing of the star Hen 2-427 - more commonly known as WR 124 - and the nebula M1-67 which surrounds it. Both objects, captured here by the Hubble Space Telescope are found in the constellation of Sagittarius and lie 15,000 light-years away. The star Hen 2-427 shines brightly at the very center of this explosive image and around the hot clumps of surrounding gas that are being ejected into space at over 93,210 miles (150,000 km) per hour. Hen 2-427 is a Wolf-Rayet star, named after the astronomers Charles Wolf and Georges Rayet. Wolf-Rayet are super-hot stars characterized by a fierce ejection of mass. The nebula M1-67 is estimated to be no more than 10,000 years old - just a baby in astronomical terms - but what a beautiful and magnificent sight it makes. Image credit: ESA/Hubble & NASA, Acknowledgement: Judy Schmidt #nasa #astronomy #star #hubble #hst #hubble25 #nebula #nasabeyond #science; -
This view from our Cassini spacecraft looks toward Saturn's icy moon Dione, with giant Saturn and its rings in the background, just prior to the mission's final close approach to the moon on Aug. 17, 2015. At lower right is the large, multi-ringed impact basin named Evander, which is about 220 miles (350 kilometers) wide. The canyons of Padua Chasma, features that form part of Dione's bright, wispy terrain, reach into the darkness at left. Imaging scientists combined nine visible light (clear spectral filter) images to create this mosaic view: eight from the narrow-angle camera and one from the wide-angle camera, which fills in an area at lower left. The scene is an orthographic projection centered on terrain at 0.2 degrees north latitude, 179 degrees west longitude on Dione. An orthographic view is most like the view seen by a distant observer looking through a telescope. North on Dione is up. Image Credit: NASA/JPL-Caltech/Space Science Institute #nasa #saturn #moon #dione #nasabeyond #solarsystem #space #science; -
Aboard the International Space Station, astronaut Scott Kelly (@stationcdrkelly) shared this image today of Hurricane Danny, which is in the Atlantic. Kelly wrote, "#HurricaneDanny Keeping an eye on you from @ISS. Looks like you're 1st in Atlantic. Stay safe! #YearInSpace." Kelly is living and working off the Earth, for the Earth aboard the station for a yearlong mission. Traveling the world more than 220 miles above the Earth, and at 17,500 mph, he circumnavigates the globe more than a dozen times a day. Image Credit: NASA #nasa #iss #spacestation #space #isscrew #storm #hurricane #danny;
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It's National Aviation Day! In honor, here is an image of a glass cockpit from a flight simulator we use to continue developing new cockpit technologies and to make airliners safer and more efficient. We originally created and tested the concept of an advanced cockpit that replaced dials and gauges with flat panel digital displays. Glass cockpits are in use everywhere today on commercial, military and general aviation aircraft. National Aviation Day is in honor of Orville Wright's birthday, directing citizens to celebrate the day with activities that encourage an interest and appreciation for aviation. With heritage in aviation research going back more than 100 years, we've helped air travel become a safe, reliable form of transportation. Image Credit: NASA Langley/Sean Smith #nasa #nasaaero #cockpit #aeronautics #NationalAviationDay #flynasa; -
Aurora's Colorful Veil Over Earth: NASA astronaut Scott Kelly (@StationCDRKelly) shared this photograph on social media, taken from the International Space Station on Aug. 15. Kelly wrote, "#Aurora trailing a colorful veil over Earth this morning. Good morning from @ISS! #YearInSpace" The dancing lights of the aurora provide spectacular views, but also capture the imagination of scientists who study incoming energy and particles from the sun. Aurora are one effect of such energetic particles, which can speed out from the sun both in a steady stream called the solar wind and due to giant eruptions known as coronal mass ejections or CMEs. After a trip toward Earth that can last two to three days, the solar particles and magnetic fields cause the release of particles already trapped near Earth, which in turn trigger reactions in the upper atmosphere in which oxygen and nitrogen molecules release photons of light. The result: the Northern and Southern lights. Image Credit: NASA #nasa #aurora #space #earth #science #iss #spacestation #yearinspace; -
Saturn's Moon Dione: Our Cassini spacecraft zipped past Saturn's moon Dione today -- the final close flyby of this icy satellite during the spacecraft's long mission. While not bursting with activity like its system sister Enceladus, the surface of Dione is definitely not boring. Some parts of the surface are covered by linear features, called chasmata, which provide dramatic contrast to the round impact craters that typically cover moons. The bright network of fractures on Dione (698 miles or 1123 kilometers across) was seen originally at poor resolution in Voyager images and was labeled as "wispy terrain." The nature of this terrain was unclear until Cassini showed that they weren't surface deposits of frost, as some had suspected, but rather a pattern of bright icy cliffs among myriad fractures. One possibility is that this stress pattern may be related to Dione's orbital evolution and the effect of tidal stresses over time. Credit: NASA/JPL-Caltech/Space Science Institute #nasa #space #cassini #saturn #dione #moon #astronomy #science #nasabeyond; -
Hubble Sees a "Mess of Stars" - Bursts of pink and red, dark lanes of mottled cosmic dust, and a bright scattering of stars - this Hubble Space Telescope image shows part of a messy barred spiral galaxy known as NGC 428. It lies approximately 48 million light-years away from Earth in the constellation of Cetus (The Sea Monster). Overall NGC 428's spiral structure appears to be quite distorted and warped, thought to be a result of a collision between two galaxies. Image credit: ESA/Hubble and NASA and S. Smartt (Queen's University Belfast) #nasa #hubble #hubble25 #hst #nasabeyond #galaxy #space #stars #astronomy #science; -
The Landsat 8 satellite captured images of algal blooms around the Great Lakes, visible as swirls of green in this image of Lake St. Clair and in western Lake Erie. Earlier in July, NOAA scientists predicted that the 2015 season for harmful algal blooms would be severe in western Lake Erie. Algae in this basin thrive when there is an abundance of nutrients (many from agricultural runoff) and sunlight, as well as warm water temperatures. The season runs through summer and peaks in September. Harmful algal blooms can lead to fish kills. They also can affect the safety of water for recreation and for consumption (as was the case in Toledo, Ohio, and southeast Michigan during a 2014 bloom). As of July 30, 2015, drinking water was reported to be safe in these areas. Image Credit: NASA Earth Observatory images by Joshua Stevens, using Landsat data from the U.S. Geological Survey #nasa #earth #earthrightnow #greatlakes #lakeerie #landsat #noaa #science;
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