In early May 2017, Tropical Cyclone Donna spun southeastward across the South Pacific, threading the islands of New Caledonia and Vanuatu. The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite captured this natural-color image of Donna at 1:50 p.m. local time (02:50 Universal Time) on May 8, 2017. Measurements made around this time showed maximum sustained winds of 115 knots (215 kilometers or 130 miles per hour)—a category 4 storm on the Saffir-Simpson wind scale. About nine hours later, the storm had weakened to a category 3 storm. Forecasters expected that cooler ocean surface temperatures and the influence of land would cause the storm to weaken as it moved east of New Caledonia.
Credit: NASA image by Jeff Schmaltz, LANCE/EOSDIS Rapid Response
Caption Credit: Kathryn Hansen
Instrument(s): Aqua - MODIS#NASA #Earth #Science #Space #Satellite #Cyclone #Tropical #Donna #PacificOcean #NewCaledonia #Vanuatu #Aqua #MODIS #EarthObservation #RemoteSensing #EarthRightNow #Goddard #GSFC #UnitedStates #STEM #Education
#Infographic
ESA Astronaut Thomas Pesquet of France: "Eat your greens kids! Fresh vegetables are rare on the International Space Station and when we get to harvest a crop of lettuce from our disco greenhouse it is a good day for us. The greenhouse is in our ESA Columbus laboratory and glows pink because researchers found out reddish light is most important for plants to grow. Growing plants in space is not easy but all the research and technology we are using is directly applicable on Earth as the goal is to grow vegetables with as little energy and resources as possible."
"Les légumes frais se font rares sur la Station, alors quand on réussit à faire pousser une laitue dans notre serre, on se prépare à un festin ! La serre en question est située dans le laboratoire de l’ESA Colombus ; la lueur rose a été choisie après que des chercheurs ont découvert que les lumières de la gamme des rouges aident la pousse des plantes. Le but est d’arriver à faire pousser des légumes en ayant recours au moins de ressources et d’énergie possibles, dans l’espace… comme sur Terre."
Credit: ESA/NASA
Image Date: April 25, 2017#NASA #ESA #ISS #Veggies #Plants #Astronauts #PeggyWhitson #ThomasPesquet #Proxima #Expedition51 #Technology #Photography #JSC #UnitedStates #CNES #France #Europe #OverviewEffect #OrbitalPerspective #STEM
#Education
ESA Astronaut Thomas Pesquet of France: "Unbelievable desert art. As often in Africa, the landscapes are so huge and diverse I’m not quite sure what I’m looking at when I take a picture."
"Coup de griffe artistique dans le désert, vers le Tchad . L’Afrique foisonne de paysages divers et imposants"
Credit: ESA/NASA
Image Date: April 29, 2017#NASA #ESA #ISS #Earth #Africa #Desert #EarthArt #Landscape #Astronaut #ThomasPesquet #Proxima #Expedition51 #Technology #Photography #JSC #UnitedStates #CNES #France #Europe #OverviewEffect #OrbitalPerspective #STEM
#Education
In early May 2017, Tropical Cyclone Donna spun southeastward across the South Pacific, threading the islands of New Caledonia and Vanuatu. The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite captured this natural-color image of Donna at 1:50 p.m. local time (02:50 Universal Time) on May 8, 2017. Measurements made around this time showed maximum sustained winds of 115 knots (215 kilometers or 130 miles per hour)—a category 4 storm on the Saffir-Simpson wind scale. About nine hours later, the storm had weakened to a category 3 storm. Forecasters expected that cooler ocean surface temperatures and the influence of land would cause the storm to weaken as it moved east of New Caledonia.
Credit: NASA image by Jeff Schmaltz, LANCE/EOSDIS Rapid Response
Caption Credit: Kathryn Hansen
Instrument(s): Aqua - MODIS#NASA #Earth #Science #Space #Satellite #Cyclone #Tropical #Donna #PacificOcean #NewCaledonia #Vanuatu #Aqua #MODIS #EarthObservation #RemoteSensing #EarthRightNow #Goddard #GSFC #UnitedStates #STEM #Education
Geologists love road cuts because they reveal the bedrock stratigraphy (layering). Until we have highways on Mars, we can get the same information from fresh impact craters as shown in this image from NASA's Mars Reconnaissance Orbiter (MRO). This image reveals these layers filling a larger crater, perhaps a combination of lava, impact ejecta, and sediments.
The University of Arizona, Tucson, operates HiRISE, which was built by Ball Aerospace & Technologies Corp., Boulder, Colorado. NASA's Jet Propulsion Laboratory, a division of Caltech in Pasadena, California, manages the Mars Reconnaissance Orbiter Project for NASA's Science Mission Directorate, Washington.
Credit: NASA/JPL/University of Arizona
Release Date: May 10, 2017#NASA #Mars #Space #Astronomy #Science #Crater #Impact #Geology #Landscape #Terrain #Geoscience #MRO #Reconnaissance #Orbiter #Spacecraft #HiRISE #Camera #JPL #STEM #Education
[Notice the fine shadows in the upper left corner...]
Most of the oldest terrains on Mars have eroded into branching valleys, as seen here in by NASA's Mars Reconnaissance Orbiter (MRO), much like many land regions of Earth are eroded by rain and snowmelt runoff. This is the primary evidence for major climate change on Mars billions of years ago. How the climate of Mars could have supported a warmer and wetter environment has been the subject of scientific debates for 40 years. A full-resolution enhanced color closeup reveals details in the bedrock and dunes on the valley floor (upper left). The bedrock of ancient Mars has been hardened and cemented by groundwater.
The University of Arizona, Tucson, operates HiRISE, which was built by Ball Aerospace & Technologies Corp., Boulder, Colorado. NASA's Jet Propulsion Laboratory, a division of Caltech in Pasadena, California, manages the Mars Reconnaissance Orbiter Project for NASA's Science Mission Directorate, Washington.
Credit: NASA/JPL/University of Arizona
Image Date: December 2016
Release Date: May 10, 2017#NASA #Mars #Space #Astronomy #Science #Valley #Bedrock #Groundwater #Climate #ClimateChange #Geology #Landscape #Terrain #Geoscience #MRO #Reconnaissance #Orbiter #Spacecraft #HiRISE #Camera #JPL #STEM #Education
Left image assembled using raw uncalibrated RGB filtered images. Right image assembled using raw uncalibrated near-infrared (CB3), green, and blue filtered images.
Titan is the largest moon of Saturn. It is the only moon known to have a dense atmosphere, and the only object in space other than Earth where clear evidence of stable bodies of surface liquid has been found. Titan is the sixth ellipsoidal moon from Saturn. Frequently described as a planet-like moon, Titan is 50% larger than Earth's Moon, and it is 80% more massive. It is the second-largest moon in the Solar System, after Jupiter's moon Ganymede, and is larger than the smallest planet, Mercury, but only 40% as massive. (Source: Wikipedia)
For more information about Cassini's Grand Finale, visit: https://saturn.jpl.nasa.gov/grandfinale
The Cassini mission is a cooperative project of NASA, ESA (the European Space Agency) and the Italian Space Agency. The Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the mission for NASA's Science Mission Directorate, Washington. The Cassini orbiter and its two onboard cameras were designed, developed and assembled at JPL. The imaging operations center is based at the Space Science Institute in Boulder, Colorado.
For more information about the Cassini-Huygens mission visit: https://saturn.jpl.nasa.gov and www.nasa.gov/cassini. The Cassini imaging team homepage is at https://ciclops.org.
Credit: NASA/JPL-Caltech/SSI/Kevin M. Gill
Image Date: May 9, 2017
Release Date: May 10, 2017#NASA #Astronomy #Science #Space #Saturn #Planet #Titan #Moon #Atmosphere #Clouds #Methane #Hydrocarbon #Lakes #Seas #GrandFinale #SolarSystem #Exploration #Cassini #Spacecraft #JPL #Pasadena #California #UnitedStates #ESA #ASI #STEM #Education
Image: This illustration compares growing supermassive black holes in two different kinds of galaxies. A growing supermassive black hole in a normal galaxy would have a donut-shaped structure of gas and dust around it (left). In a merging galaxy, a sphere of material obscures the black hole (right).
May 9, 2017: Black holes get a bad rap in popular culture for swallowing everything in their environments. In reality, stars, gas and dust can orbit black holes for long periods of time, until a major disruption pushes the material in.
A merger of two galaxies is one such disruption. As the galaxies combine and their central black holes approach each other, gas and dust in the vicinity are pushed onto their respective black holes. An enormous amount of high-energy radiation is released as material spirals rapidly toward the hungry black hole, which becomes what astronomers call an active galactic nucleus (AGN).
A study using NASA's NuSTAR telescope shows that in the late stages of galaxy mergers, so much gas and dust falls toward a black hole that the extremely bright AGN is enshrouded. The combined effect of the gravity of the two galaxies slows the rotational speeds of gas and dust that would otherwise be orbiting freely. This loss of energy makes the material fall onto the black hole.
"The further along the merger is, the more enshrouded the AGN will be," said Claudio Ricci, lead author of the study published in the Monthly Notices Royal Astronomical Society. "Galaxies that are far along in the merging process are completely covered in a cocoon of gas and dust."
Ricci and colleagues observed the penetrating high-energy X-ray emission from 52 galaxies. About half of them were in the later stages of merging. Because NuSTAR is very sensitive to detecting the highest-energy X-rays, it was critical in establishing how much light escapes the sphere of gas and dust covering an AGN.
The study was published in the Monthly Notices of the Royal Astronomical Society. Researchers compared NuSTAR observations of the galaxies with data from NASA's Swift and Chandra and ESA's XMM-Newton observatories, which look at lower energy components of the X-ray spectrum. If high-energy X-rays are detected from a galaxy, but low-energy X-rays are not, that is a sign that an AGN is heavily obscured.
The study helps confirm the longstanding idea that an AGN's black hole does most of its eating while enshrouded during the late stages of a merger.
"A supermassive black hole grows rapidly during these mergers," Ricci said. "The results further our understanding of the mysterious origins of the relationship between a black hole and its host galaxy."
NuSTAR is a Small Explorer mission led by Caltech and managed by NASA's Jet Propulsion Laboratory for NASA's Science Mission Directorate in Washington. NuSTAR was developed in partnership with the Danish Technical University and the Italian Space Agency (ASI). The spacecraft was built by Orbital Sciences Corp., Dulles, Virginia. NuSTAR's mission operations center is at UC Berkeley, and the official data archive is at NASA's High Energy Astrophysics Science Archive Research Center. ASI provides the mission's ground station and a mirror archive. JPL is managed by Caltech for NASA.
For more information on NuSTAR, visit:
www.nasa.gov/nustar
www.nustar.caltech.edu
Credits: NASA/CXC/M.Weiss/National Astronomical Observatory of Japan
Release Date: May 9, 2017#NASA #Astronomy #Science #Space #BlackHoles #Galaxies #AGN #Cosmos #Universe #Astrophysics #Xrays #Swift #XMMNewton #NUSTAR #JPL #Caltech #ASI #STEM #Education #Illustration #Artist
Observation by NASA's Mars Reconnaissance Orbiter (MRO), approximately 252 kilometers above the surface. Enhanced color scene is less than 1 km across;
This image was acquired by the High Resolution Imaging Science Experiment (HiRISE) instrument.
The University of Arizona, Tucson, operates HiRISE, which was built by Ball Aerospace & Technologies Corp., Boulder, Colorado. NASA's Jet Propulsion Laboratory, a division of Caltech in Pasadena, California, manages the Mars Reconnaissance Orbiter Project for NASA's Science Mission Directorate, Washington.
Credit: NASA/JPL/University of Arizona
Image Date: December 2016
Release Date: May 10, 2017#NASA #Mars #Space #Astronomy #Science #Crater #Hale #Geology #Landscape #Terrain #Geoscience #MRO #Reconnaissance #Orbiter #Spacecraft #HiRISE #Camera #JPL #STEM #Education
U.S. Astronauts Peggy Whitson and Jack Fischer have reviewed procedures for Friday morning’s spacewalk. The duo will replace an avionics box that sends electricity and data to science experiments installed outside the space station. Flight Engineer Thomas Pesquet will assist the spacewalkers from inside the station. This will be the 200th spacewalk at the station for assembly and maintenance, the ninth for Whitson and the first for Fischer.
ESA Astronaut Thomas Pesquet of France: "Not very common to see a spacesuit INSIDE the ISS! We verified 2fish’s fit check, so that everything is ready for Friday when he and Peggy will go out. He seized the opportunity to explore a little bit inside! I guess it’s the first ever IVA (intra vehicular activity) in the history of the ISS program!"
"Ce n’est pas tous les jours qu’on voit un astronaute dans un scaphandre DANS la Station ! Dans la perspective de la sortie extravéhiculaire de Peggy et Jack vendredi prochain, nous avons procédé à une vérification des combinaisons… Et mon coéquipier en a profité pour explorer un peu la Station vêtu tel quel ! Probablement la première activité « intravéhiculaire » de l’histoire du programme ISS ;)"
Credit: ESA/NASA
Image Date: May 9, 2017#NASA #ESA #ISS #Earth #Science #Spacesuit #EVA #IVA #Spacewalk #Astronauts #JackFischer #PeggyWhitson #ThomasPesquet #Proxima #Expedition51 #Technology #Photography #JSC #UnitedStates #CNES #France #Europe #OverviewEffect #OrbitalPerspective #STEM
#Education
ESA Astronaut Thomas Pesquet of France: "This storm looks like it will crush everything in its path, somewhere in the Pacific Ocean."
"Cette tempête a l’air de tout écraser sur son passage, en plein océan Pacifique"
Credit: ESA/NASA
Release Date: April 13, 2017#NASA #ESA #ISS #Earth #Science #Weather #Storm #Pacific #Ocean #Astronaut #ThomasPesquet #Proxima #Expedition51 #Technology #Photography #JSC #CNES #France #Europe #OverviewEffect #OrbitalPerspective #STEM
#Education
ESA Astronaut Thomas Pesquet of France: "When there is a full moon you can see almost as clearly as during daylight, especially when there are city lights to illuminate the night as well! Our satellite is reflected on the sea and gives the Station a gray aura that distinguishes us from that of the sun."
"Par nuit de pleine lune, on voit presque comme en plein jour, les lumières des villes en plus ! Notre satellite naturel se reflète sur la mer et donne à la Station une aura grise qui nous change de celle du soleil..."
Credit: ESA/NASA
Release Date: April 2, 2017#NASA #ESA #ISS #Earth #Moon #Moonlight #Science #Astronaut #ThomasPesquet #Proxima #Expedition51 #Technology #Photography #JSC #CNES #France #Europe #OverviewEffect #OrbitalPerspective #STEM
#Education
Colorful New Portrait Shows Energetic Details Embedded in Supernova Remnant
In the summer of the year 1054 AD, Chinese astronomers saw a new "guest star," that appeared six times brighter than Venus. So bright in fact, it could be seen during the daytime for several months. Halfway around the world, Native Americans made pictographs of a crescent moon with the bright star nearby that some think may also have been a record of the supernova.
This "guest star" was forgotten about until 700 years later with the advent of telescopes. Astronomers saw a tentacle-like nebula in the place of the vanished star and called it the Crab Nebula. Today we know it as the expanding gaseous remnant from a star that self-detonated as a supernova, briefly shining as brightly as 400 million suns. The explosion took place 6,500 light-years away. If the blast had instead happened 50 light-years away it would have irradiated Earth, wiping out most life forms.
In the late 1960s astronomers discovered the crushed heart of the doomed star, an ultra-dense neutron star that is a dynamo of intense magnetic field and radiation energizing the nebula. Astronomers therefore need to study the Crab Nebula across a broad range of electromagnetic radiation, from X-rays to radio waves. This composite picture from five observatories captures the complexity of this tortured-looking supernova remnant.
Credits:
NASA, ESA, G. Dubner (IAFE, CONICET-University of Buenos Aires) et al.; A. Loll et al.; T. Temim et al.; F. Seward et al.; VLA/NRAO/AUI/NSF; Chandra/CXC; Spitzer/JPL-Caltech; XMM-Newton/ESA; and Hubble/STScI
Release Date: May 10, 2017#NASA #Hubble #Astronomy #Science #Space #Nebula #Crab #Supernova #Remnant #Neutron #Stars #Astrophysics #Cosmos #Universe #Telescope #ESA #STScI #Goddard #GSFC #STEM #Education
