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[Artist Concept] The National Science Foundation (NSF) has announced the detection of gravitational waves. Albert Einstein predicted the existence of gravitational waves in his general theory of relativity a century ago, and scientists have been attempting to detect them for 50 years. Einstein pictured these waves as ripples in the fabric of space-time produced by massive, accelerating bodies, such as black holes orbiting each other. Scientists are interested in observing and characterizing these waves to learn more about the sources producing them and about gravity itself. An artist's impression of gravitational waves generated by binary neutron stars. Credits: R. Hurt/Caltech-JPL #nasa #Einstein #space #gravity #nasabeyond #science; -
British European Space Agency astronaut Tim Peake (@astro_timpeake) posted this video and wrote, 'Amazing how much lightning can strike our planet in a short time #Principia #timelapse.' Astronauts capture photographs and video of the Earth from the International Space Station (@ISS) routinely. The station is a unique place - a convergence of science, technology and human innovation that demonstrates new technologies and makes research breakthroughs not possible on Earth. It is a microgravity laboratory in which an international crew of six people live and work while traveling at a speed of 17,500 mph, orbiting Earth every 90 minutes. Image Credit: ESA #nasa #esa #iss #space #lightning #spacestation #science #earth; -
Ices and Shadows: Saturn's moon Tethys appears to float between two sets of rings in this view from our Cassini spacecraft, but it's just a trick of geometry. The rings, which are seen nearly edge-on, are the dark bands above Tethys, while their curving shadows paint the planet at the bottom of the image. Tethys (660 miles or 1,062 kilometers across) has a surface composed mostly of water ice, much like Saturn's rings. Water ice dominates the icy surfaces in the the far reaches of our solar system, but ammonia and methane ices also can be found. Image Credit: NASA/JPL-Caltech/Space Science Institute #nasa #space #saturn #cassini #tethys #astronomy #nasabeyond #science; -
Our satellite captured the San Francisco Bay Area, home of Levi's Stadium and Super Bowl 50, from space! Landsat 7 is a U.S. satellite used to acquire remotely sensed images of the Earth's land surface and surrounding coastal regions. It is maintained by the Landsat 7 Project Science Office at the Goddard Space Flight Center (@NASAGoddard) ...Landsat satellites have been acquiring images of the Earth’s land surface since 1972. Currently there are more than 2 million Landsat images in the National Satellite Land Remote Sensing Data Archive. Credit: NASA/GSFC/Landsat 7 #nasa #superbowlsunday #sb50 #superbowl50 #superbowl #space #science #earth #landsat #earthrightnow #supercity; -
Earth is beautiful! NASA astronaut Scott Kelly (@StationCDRKelly) captures photographs and video of the Earth from the International Space Station (@ISS) routinely. On Jan. 25, 2015, Kelly shared this stunning image, writing "Day 304. That's 4,864 orbits around' our beautiful planet #Earth." The station is a unique place - a convergence of science, technology and human innovation that demonstrates new technologies and makes research breakthroughs not possible on Earth. It is a microgravity laboratory in which an international crew of six people live and work while traveling at a speed of 17,500 mph, orbiting Earth every 90 minutes. Image Credit: NASA #nasa #space #iss #spacestation #yearinspace #earth;
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Galactic Merger! This image shows a peculiar galaxy known as NGC 1487, lying about 30 million light-years away. Rather than viewing it as a celestial object, it is actually better to think of this as an event. Here, we are witnessing two or more galaxies in the act of merging together to form a single new galaxy. Each galaxy has lost almost all traces of its original appearance, as stars and gas have been thrown by gravity in an elaborate cosmic whirl. Image credit: ESA/Hubble & NASA #nasa #hubble #space #hst #esa #astronomy #nasabeyond #science; -
Saturn's rings: less than meets the eye? It seems intuitive that an opaque material should contain more stuff than a more translucent substance. For example, muddier water has more suspended particles of dirt in it than clearer water. Likewise, you might think that, in the rings of Saturn, more opaque areas contain a greater concentration of material than places where the rings seem more transparent. But some parts of Saturn's B ring are up to 10 times more opaque than the neighboring A ring, but the B ring may weigh in at only two to three times the A ring's mass. Credits: NASA/JPL-Caltech/Space Science Institute #nasa #saturn #cassini #space #astronomy #nasabeyond #science; -
Blast From Black Hole in a Galaxy Far, Far Away: The Star Wars franchise has featured the fictitious "Death Star," which can shoot powerful beams of radiation across space. The Universe, however, produces phenomena that often surpass what science fiction can conjure. The Pictor A galaxy is one such impressive object. This galaxy, located nearly 500 million light years from Earth, contains a supermassive black hole at its center. A huge amount of gravitational energy is released as material swirls towards the event horizon, the point of no return for infalling material. This energy produces an enormous beam, or jet, of particles traveling at nearly the speed of light into intergalactic space. Credits: X-ray: NASA/CXC/Univ. of Hertfordshire/M. Hardcastle et al.; Radio: CSIRO/ATNF/ATCA #nasa #astronomy #space #galaxy #blackhole #nasabeyond #science; -
Fly Over Dwarf Planet Ceres: A colorful new animation shows a simulated flight over the surface of dwarf planet Ceres, based on images from our Dawn spacecraft. The movie shows Ceres in enhanced color, which helps to highlight subtle differences in the appearance of surface materials. Scientists believe areas with shades of blue contain younger, fresher material, including flows, pits and cracks. This animated flight over Ceres emphasizes the prominent crater Occator and its intriguing bright spots, which are believed to be a type of salt. Credit: NASA #nasa #ceres #space #planet #nasabeyond #dawn #spacecraft #science; -
Misbehaving Spiral Galaxy: Despite its unassuming appearance, the edge-on spiral galaxy captured in the left half of this Hubble Space Telescope image is actually quite remarkable. Located about one billion light-years away, this striking galaxy - known as LO95 0313-192 - has a spiral shape similar to that of the Milky Way. It has a large central bulge, and arms speckled with brightly glowing gas mottled by thick lanes of dark dust. Its companion, sitting in the right of the frame, is known rather unpoetically as [LOY2001] J031549.8-190623. Jets, outbursts of superheated gas moving at close to the speed of light, have long been associated with the cores of giant elliptical galaxies, and galaxies in the process of merging. However, in an unexpected discovery, astronomers found LO95 0313-192, even though it is a spiral galaxy, to have intense radio jets spewing out from its center. The galaxy appears to have two more regions that are also strongly emitting in the radio part of the spectrum, making it even rarer still. Image credit: ESA/Hubble & NASA; acknowledgement, Judy Schmidt #nasa #hubble #hst #space #nasabeyond #astronomy #galaxy #science;
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Mars Selfie: Our Curiosity Rover has perfected taking selfies on Mars. This self-portrait shows the rover at the "Namib Dune," where it has been scooping samples of sand for analysis. The rover may look petite in this shot, but don't let its camera skills fool you. Curiosity is a car-sized mobile laboratory and has wheels that are 20 inches in diameter. Credits: NASA/JPL-Caltech/MSSS @NASAJPL #nasa #mars #journeytomars #marscuriosity #geography #selfie #science; -
We See Monstrous Cloud Boomerang Back to our Galaxy: Hubble Space Telescope astronomers are finding that the old adage "what goes up must come down" even applies to an immense cloud of hydrogen gas outside our Milky Way galaxy. The invisible cloud is plummeting toward our galaxy at nearly 700,000 miles per hour. Though hundreds of enormous, high-velocity gas clouds whiz around the outskirts of our galaxy, this so-called "Smith Cloud" is unique because its trajectory is well known. New Hubble observations suggest it was launched from the outer regions of the galactic disk, around 70 million years ago. The cloud was discovered in the early 1960s by doctoral astronomy student Gail Smith, who detected the radio waves emitted by its hydrogen. The cloud is on a return collision course and is expected to plow into the Milky Way's disk in about 30 million years. When it does, astronomers believe it will ignite a spectacular burst of star formation, perhaps providing enough gas to make 2 million suns. This composite image shows cloud in false-color, radio wavelengths as observed by the Green Bank Telescope in West Virginia. The visible-light image of the background star field shows the cloud's location in the direction of the constellation Aquila. Credits: Saxton/Lockman/NRAO/AUI/NSF/Mellinger #nasa #hubble #hst #nasabeyond #galaxy #space #smithcloud #science; -
Today we pay tribute to the crews of Apollo 1 and space shuttles Challenger and Columbia, as well as our other colleagues. Our 'Day of Remembrance' honors members of the NASA family who lost their lives while furthering the cause of exploration and discovery. This year, as we remember all who we lost, we mark a very somber 30-year anniversary - the loss of STS-51L (Challenger) on January 28, 1986. Remember them not for how they died but for those ideals for which they lived. Credit: NASA #nasa #challenger #nasaremembers #columbia #apollo1 #otd; -
Rebel Galaxy: Most galaxies possess a majestic spiral or elliptical structure. About a quarter of galaxies, though, defy such conventional, rounded aesthetics, instead sporting a messy, indefinable shape. Known as irregular galaxies, this group includes NGC 5408, the galaxy that has been snapped here by the NASA/ESA Hubble Space Telescope. John Herschel recorded the existence of NGC 5408 in June 1834. Astronomers had long mistaken NGC 5408 for a planetary nebula, an expelled cloud of material from an aging star. Instead, bucking labels, NGC 5408 turned out to be an entire galaxy, located about 16 million light-years from Earth in the constellation of Centaurus (The Centaur). Image credit: ESA/Hubble & NASA, Acknowledgement: Judy Schmidt #nasa #space #esa #hubble #hst #astronomy #galaxy #nasabeyond #science; -
Ping pong in space, anyone? NASA astronaut Scott Kelly, who marked day 300 of a historic year in space on Jan. 21, shows off another fascinating feature of life in microgravity. Kelly used two paddles with hydrophobic, or water repellant, features to pass a sphere of water back and forth. Scientists use the microgravity environment of the space station to advance scientific knowledge in Earth, space, physical, and biological sciences that otherwise wouldn't be possible down here on the planet. The paddles are polycarbonate laser etched so that the surfaces are actually arrays of 300 micrometer posts (0.3mm). The surfaces were then spray coated with a Teflon coat. The combined effects of surface roughness and non-wettability produce a super-hydrophobic surface capable of preventing water adhesion in dynamic processes. The larger the drop, the less force it takes to break it up. The smaller the drop, the harder you can hit it. Scott is demonstrating about a 4 mL drop (over 100 times larger than a rain drop). Credit: NASA #nasa #space #spacestation #pingpong #yearinspace #iss #science @ISS;
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