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Data from NASA’s Aeronomy of Ice in the Mesosphere, or AIM, spacecraft shows the sky over Antarctica is glowing electric blue due to the start of noctilucent, or night-shining, cloud season in the Southern Hemisphere – and an early one at that. Noctilucent clouds are Earth’s highest clouds, sandwiched between Earth and space 50 miles above the ground in a layer of the atmosphere called the...
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While it seems static from our vantage point on Earth 93 million miles away, the sun is constantly changing. Under the influence of complex magnetic forces, material moves throughout the solar atmosphere and can burst forth in massive eruptions.

NASA’s Interface Region Imaging Spectrograph, or IRIS, which will continue its study of the sun thanks to a recent mission extension, watches what is...
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High above the surface, Earth’s magnetic field constantly deflects incoming supersonic particles from the sun. These particles are disturbed in regions just outside of Earth’s magnetic field – and some are reflected into a turbulent region called the foreshock. New observations from NASA’s THEMIS mission show that this turbulent region can accelerate electrons up to speeds approaching the...
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MMS now holds the Guinness World Record for highest altitude fix of a GPS signal -- 43,500 miles above Earth's surface!

[ Go.nasa.gov Link ]
On Oct. 19, 2016, operators instructed NASA’s Solar Dynamics Observatory, or SDO, to look up and down and then side to side over the course of six hours, as if tracing a great plus sign in space. During this time, SDO produced some unusual data. Taken every 12 seconds, SDO images show the sun dodging in and out of the frame. SDO captured these images in extreme ultraviolet light, a type of...
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On Oct. 30, 2016, NASA’s Solar Dynamics Observatory, or SDO, experienced a partial solar eclipse in space when it caught the moon passing in front of the sun. The lunar transit lasted one hour, between 3:56 p.m. and 4:56 p.m. EDT, with the moon covering about 59 percent of the sun at the peak of its journey across the face of the sun. The moon’s shadow obstructs SDO’s otherwise constant view...
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Active regions on the sun combined to look something like a spooky jack-o'-lantern’s face in this image from Oct. 8, 2014. The image was captured by NASA's Solar Dynamics Observatory, or SDO, which watches the sun at all times from its orbit in space.

The active regions in this image appear brighter because those are areas that emit more light and energy. They are markers of an intense and...
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Our scientist Yari Collado-Vega is live with Es Trending to talk about solar storms.
One of STEREO's key instruments is called a coronagraph, which makes it possible to discern the detailed features of the sun's atmosphere, the corona. Coronagraphs give us important information about how corona changes, including letting scientists watch as it sends clouds of solar material out into space.

What exactly do scientists see in coronagraph images? Watch this video to find out.


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STEREO is the star of NASA's Snapchat today!

The full STEREO Snapchat story is available until just after 11 am ET on Oct. 27, and you can always find STEREO info and images at .
NASA's STEREO mission gave humanity the first-ever view of our entire sun all at once, and this week, the twin satellites are celebrating their 10th birthday. NASA scientists Eric Christian and Georgia de Nolfo at NASA's Goddard Space Flight Center in Maryland are talking about some of STEREO's greatest achievements in solar science, why NASA studies space weather, and the upcoming...
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Join us here on this page today at 12 pm EDT to for a live show about our sun-watching STEREO mission! Scientists will be answering your questions on-air, so be sure to leave them in comments section of the live video.
Join us here tomorrow, Oct. 26, at noon EDT for a live show about the STEREO mission and why NASA studies the sun!

Launched 10 years ago, on Oct. 25, 2006, the twin spacecraft of NASA’s STEREO mission – short for Solar and Terrestrial Relations Observatory – have given us unprecedented views of the sun, including the first-ever simultaneous view of the entire star at once.

This kind of comprehensive data is key to understanding how the sun erupts with things like coronal mass ejections and energetic...
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The STEREO mission celebrates its 10th anniversary on Tuesday, Oct. 25! Hear from NASA scientist Georgia de Nolfo on why this mission is so important.
NASA solar scientist Alex Young, on the Weather Channel discussing space weather.
While it often seems unvarying from our viewpoint on Earth, the sun is constantly changing. Material courses through not only the star itself, but throughout its expansive atmosphere. Understanding the dance of this charged gas is a key part of better understanding our sun – how it heats up its atmosphere, how it creates a steady flow of solar wind streaming outward in all directions, and how...
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Data from two of our satellites helps scientists better understand how high-energy solar particles spread throughout space. Learn more: [ Go.nasa.gov Link ]
Along with the visible light and warmth constantly emitted by our sun comes a whole spectrum of X-ray and ultraviolet radiation that streams toward Earth. A new CubeSat – a miniature satellite that provides a low-cost platform for missions – is now in space observing a particular class of X-ray light that has rarely been studied.

On June 9, 2016, the NASA-funded, bread loaf-sized Miniature...
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Massive arches of solar material brighten and stream over an active region on the sun’s surface in this animation of imagery captured by NASA’s Solar Dynamics Observatory, or SDO, on Sept. 29, 2016. Active regions are areas of particularly strong and complex magnetic fields. Charged solar particles travel along and illuminate the magnetic field lines above this region. The Earth is inset in...
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NASA's SDO Watches Magnetic Arches Tower Over Sun's Surface

Massive arches of solar material brighten and stream over an active region on the sun’s surface in this animation of imagery captured by NASA’s Solar Dynamic...

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