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Repost from @whitehouse: Check out this look at our sun taken by @NASA’s Solar Dynamics Observatory. The SDO watches the sun constantly, and it captured this image of the sun emitting a mid-level solar flare on June 25. Solar flares are powerful bursts of radiation. Harmful radiation from a flare can't pass through Earth's atmosphere to physically affect humans on the ground. But when they're intense enough, they can disturb the atmosphere in the layer where GPS and communications signals travel. #AstronomyNight; -
Repost from @whitehouse: It’s #AstronomyNight at the White House! @NASA's here on the South Lawn teaching everyone about the science of astronomy. And tonight, they're taking over our account to show different ways of observing the universe and seeing the world around us. Here’s a nighttime view of Washington, D.C. from the astronauts on the International Space Station @ISS on October 17. Can you spot the White House? Follow along tonight as we celebrate everyone who's looking up at the night sky with curiosity!; -
A mass of plasma gathered itself into a twisting mass, spun around for a bit, then rose up and broke apart over a 10-hour period (Oct. 13, 2015). The image and video were produced with a combination of two wavelengths of extreme ultraviolet light. Prominences are unstable clouds of gas tethered above the surface of the Sun by magnetic forces. Much of the jittering and odd jumping motions above the surface were artifacts caused by brightening and contrast changes used to bring out the detail and structure of the prominence. Credit: Solar Dynamics Observatory, NASA #nasa #space #sun #plasma #nasabeyond #science; -
Hubble Sees Elegant Spiral Hiding a Hungry Monster NGC 4639 is a beautiful example of a type of galaxy known as a barred spiral. It lies over 70 million light-years away in the constellation of Virgo and is one of about 1,500 galaxies that make up the Virgo Cluster. In this image, taken by the Hubble Space Telescope, one can clearly see the bar running through the bright, round core of the galaxy. Bars are found in around two-thirds of spiral galaxies, and are thought to be a natural phase in their evolution. The galaxy’s spiral arms are sprinkled with bright regions of active star formation. Each of these tiny jewels is actually several hundred light-years across and contains hundreds or thousands of newly formed stars. But NGC 4639 also conceals a dark secret in its core — a massive black hole that is consuming the surrounding gas. Image credit: ESA/Hubble & NASA; -
New Spaceflight Record! Just before the 15th anniversary of continuous human presence on the International Space Station (@ISS) on Nov. 2, 2015, U.S. astronaut Scott Kelly (@StationCDRKelly) is breaking spaceflight records. On Friday, Oct. 16, Kelly begins his 383rd day living in space, surpassing U.S. astronaut Mike Fincke's record of 382 cumulative days. Kelly will break another record Oct. 29 on his 216th consecutive day in space, when he will surpass astronaut Michael Lopez-Alegria's record for the single-longest spaceflight by an American. Lopez-Alegria spent 215 days in space as commander of the Expedition 14 crew in 2006. In this July 12 photograph, Kelly is seen inside the Cupola, a special module which provides a 360-degree viewing of the Earth and the space station. On each additional day he spends in orbit as part of his one-year mission, Kelly will add to his record and to our understanding of the effects of long-duration spaceflight. Kelly is scheduled to return to Earth on March 3, 2016, by which time he will have compiled 522 total days living in space during four missions. Image Credit: NASA #nasa #space #yearinspace #iss #spacestation #exp45;
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Our Cassini spacecraft zoomed by Saturn's icy moon Enceladus on Wednesday, Oct. 14, capturing this stunning image of the moon's north pole. A companion view from the wide-angle camera (PIA20010) shows a zoomed out view of the same region for context. Scientists expected the north polar region of Enceladus to be heavily cratered, based on low-resolution images from the Voyager mission, but high-resolution Cassini images show a landscape of stark contrasts. Thin cracks cross over the pole -- the northernmost extent of a global system of such fractures. Before this Cassini flyby, scientists did not know if the fractures extended so far north on Enceladus. Image Credit: NASA/JPL-Caltech/Space Science Institute #nasa #cassini #saturn #enceladus #moon #nasabeyond #science; -
The dark area across the top of the sun in this image is a coronal hole, a region on the sun where the magnetic field is open to interplanetary space, sending coronal material speeding out in what is called a high-speed solar wind stream. The high-speed solar wind originating from this coronal hole, imaged here on Oct. 10 by our Solar Dynamics Observatory, created a geomagnetic storm near Earth that resulted in several nights of auroras. This image was taken in wavelengths of 193 Angstroms, which is invisible to our eyes and is typically colorized in bronze. Image credit: NASA/SDO #nasa #space #sdo #sun #earth #nasabeyond #science; -
New imagery from our Hubble Space Telescope is revealing details never before seen on Jupiter. High-resolution maps and spinning globes are the first products to come from a program to study the solar system's outer planets each year using Hubble. The observations are designed to capture a broad range of features, including winds, clouds, storms and atmospheric chemistry. These annual studies will help current and future scientists see how such giant worlds change over time. Already, the Jupiter images have revealed a rare wave just north of the planet's equator and a unique filamentary feature in the core of the Great Red Spot not seen previously. Credits: NASA/ESA/Goddard/UCBerkeley/JPL-Caltech/STScI #nasa #space #hubble #jupiter #hst #planet #nasabeyond #science; -
NASA astronaut Scott Kelly (@StationCDRKelly) captured this photograph of the green lights of the aurora from the International Space Station on Oct. 7. Sharing with his social media followers, Kelly wrote, "The daily morning dose of #aurora to help wake you up. #GoodMorning from @ISS! #YearInSpace Image credit: NASA #nasa #space #iss #spacestation #earth; -
Archives, in their many forms, save information from today that people will want to access and study in the future. This is a critical function of all archives, but it is especially important when it comes to storing data from today's modern telescopes. our Chandra X-ray Observatory has collected data for over sixteen years on thousands of different objects throughout the universe. Once the data is processed, all of the data goes into an archive and is available to the public. To celebrate American Archive Month, we are releasing a collection of new images from the Chandra archive. By combining data from different observation dates, new perspectives of cosmic objects can be created. With archives like those from Chandra and other major observatories, such vistas will be available for future exploration. Image Credit: NASA #nasa #astronomy #chandra #space #nasabeyond #xray #universe #science;
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On the night of Oct. 8, a photographer in Harstad, Norway captured this image of the dancing northern lights. Auroras are created when fast-moving, magnetic solar material strikes Earth's magnetic bubble, the magnetosphere. This collision rattles the magnetosphere in an event called a geomagnetic storm, sending trapped charged particles zooming down magnetic field lines towards the atmosphere, where they collide brilliantly with molecules in the air, creating auroras. Though many geomagnetic storms are associated with clouds of solar material that explode from the sun in an event called a coronal mass ejection, or CME, this storm was caused by an especially fast stream of solar wind. "Geomagnetic storms caused by high-speed solar wind streams aren't uncommon," said Leila Mays, a space physicist at our Goddard Space Flight Center in Greenbelt, Maryland. "Near solar minimum-when solar activity like CMEs are less frequent-these fast streams are actually the most common cause of geomagnetic storms that create auroras." Image courtesy of Johnny Henriksen/Spaceweather.com #nasa #space #photography #aurora #spaceweather #nasabeyond #sun #earth #science; -
When stars that are around the mass of the sun reach their final stages of life, they shed their outer layers into space, which appear as glowing clouds of gas called planetary nebulae. The ejection of mass in stellar burnout is irregular and not symmetrical, so that planetary nebulae can have very complex shapes. In the case of this one, the nebula forms a winding blue cloud that perfectly aligns with two stars at its center. In 1999 astronomers discovered that the star at the upper right is in fact the central star of the nebula, and the star to the lower left is probably a true physical companion of the central star. For tens of thousands of years the stellar core will be cocooned in spectacular clouds of gas and then, over a period of a few thousand years, the gas will fade away into the depths of the universe. The curving structure of this planetary nebula resembles a last goodbye before the star reaches its final stage of retirement as a white dwarf. Image credit: ESA/Hubble & NASA, Acknowledgement: Serge Meunier #nasa #nebula #stars #space #astronomy #nasabeyond #science #hubble #hst #hubble25; -
Pluto's haze layer shows its blue color in this picture taken by our New Horizons Ralph/Multispectral Visible Imaging Camera (MVIC). The high-altitude haze is thought to be similar in nature to that seen at Saturn's moon Titan. The source of both hazes likely involves sunlight-initiated chemical reactions of nitrogen and methane, leading to relatively small, soot-like particles (called tholins) that grow as they settle toward the surface. This image was generated by software that combines information from blue, red and near-infrared images to replicate the color a human eye would perceive as closely as possible. Image Credit: NASA/JHUAPL/SwRI #nasa #space #pluto #plutoflyby #solarsystem #newhorizons #nasabeyond #science; -
Scientists compared ground-based videos of pulsating auroras—a certain type of aurora that appears as patches of brightness regularly flickering on and off—with satellite measurements of the numbers and energies of electrons raining down towards the surface from inside Earth’s magnetic bubble, the magnetosphere. The team found something unexpected: A drop in the number of low-energy electrons, long thought to have little or no effect, corresponds with especially fast changes in the shape and structure of pulsating auroras. This image of a colorful aurora was taken in Delta Junction, Alaska, on April 10, 2015. All auroras are created by energetic electrons, which rain down from Earth’s magnetic bubble and interact with particles in the upper atmosphere to create glowing lights that stretch across the sky. Credits: Image courtesy of Sebastian Saarloos #nasa #aurora #earth #earthrightnow #science; -
This map-projected view of Ceres was created from images taken by our Dawn spacecraft during its high-altitude mapping orbit, in August and September 2015. Images taken using infrared (920 nanometers), red (750 nanometers) and blue (440 nanometers) spectral filters were combined to create this false-color view. Redder colors indicate places on Ceres' surface that reflect light strongly in the infrared, while bluish colors indicate enhanced reflectivity at short (bluer) wavelengths; green indicates places where albedo, or overall brightness, is strongly enhanced. Scientists use this technique in order to highlight subtle color differences across Ceres, which would appear fairly uniform in natural color. This can provide valuable insights into the mineral composition of the surface, as well as the relative ages of surface features. Image Credit: NASA/JPL-Caltech/UCLA/MPS/DLR/IDA #nasa #dawn #nasadawn #ceres #solarsystem #space #nasabeyond #science @NASAJPL;
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