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NASA's Solar Dynamics Observatory observed a partial eclipse that at its peak covered only about 14 per cent of the sun on Aug. 21, 2017.
NASA's Solar Dynamics Observatory observed a partial eclipse that at its peak covered only about 14 per cent of the sun on Aug. 21, 2017.

SDO Saw Only a Partial Eclipse

This image from NASA's Solar Dynamics Observatory shows a broad coronal hole, the dominant feature this week on the sun on Nov. 7-9, 2017. It was easily recognizable as the dark expanse across the top of the sun and extending down in each side.
This image from NASA's Solar Dynamics Observatory shows a broad coronal hole, the dominant feature this week on the sun on Nov. 7-9, 2017. It was easily recognizable as the dark expanse across the top of the sun and extending down in each side.

Coronal Hole All Spread Out

As an active region rotated into view, NASA's Solar Dynamics Observatory was able to observe well-defined magnetic loops gyrating above the sun between Mar, 23-24, 2017.
As an active region rotated into view, NASA's Solar Dynamics Observatory was able to observe well-defined magnetic loops gyrating above the sun between Mar, 23-24, 2017.

Dynamic Loops in Profile

This image taken by NASA's Dawn spacecraft presents two small craters on Ceres, located in the vicinity of Toharu Crater. Juling appears at the top and Kupalo at bottom. Both craters are relatively young, as indicated by their sharp rims.
This image taken by NASA's Dawn spacecraft presents two small craters on Ceres, located in the vicinity of Toharu Crater. Juling appears at the top and Kupalo at bottom. Both craters are relatively young, as indicated by their sharp rims.

Juling and Kupalo Craters

NASA's Solar Dynamics Observatory sees the sun has been virtually spotless, as in no sunspots, a 11-day spotless stretch not seen since the last solar minimum many years ago.
NASA's Solar Dynamics Observatory sees the sun has been virtually spotless, as in no sunspots, a 11-day spotless stretch not seen since the last solar minimum many years ago.

Spotless Sun

This composite image shows the asteroid 243 Ida as seen from NASA's Galileo spacecraft during its approach on August 28, 1993.
This composite image shows the asteroid 243 Ida as seen from NASA's Galileo spacecraft during its approach on August 28, 1993.

Asteroid Ida - 6 Views Showing Rotation

An active region, just rotating into view on Oct. 4, 2016, gave NASA's Solar Dynamics Observatory a perfect view of the tussle of magnetic field lines above it.
An active region, just rotating into view on Oct. 4, 2016, gave NASA's Solar Dynamics Observatory a perfect view of the tussle of magnetic field lines above it.

Agitated Active Region

NASA's Solar Dynamics Observatory, observed three distinct active regions with towering arches above them rotated into view over a three-day period (Sept. 24-26, 2017). To give some sense of scale, the largest arches rose up many times the size of Earth.
NASA's Solar Dynamics Observatory, observed three distinct active regions with towering arches above them rotated into view over a three-day period (Sept. 24-26, 2017). To give some sense of scale, the largest arches rose up many times the size of Earth.

Trio of Tempests

A prominence observed along the right edge of the sun rose up and then most of it bent back down to the surface, as seen by NASA's Solar Dynamics Observatory on Oct. 4, 2016.
A prominence observed along the right edge of the sun rose up and then most of it bent back down to the surface, as seen by NASA's Solar Dynamics Observatory on Oct. 4, 2016.

Bendable Prominence

The Sun produced three M-class (medium-sized) flares in less than 13 hours and the third one had an interesting flourish at the end (July 22-23, 2016). These were the largest flares the Sun had produced this year as seen by NASA's Solar Dynamics Observato
The Sun produced three M-class (medium-sized) flares in less than 13 hours and the third one had an interesting flourish at the end (July 22-23, 2016). These were the largest flares the Sun had produced this year as seen by NASA's Solar Dynamics Observato

Solar Flares with some Flair

When an active region rotated over to the edge of the sun, it presented NASA's Solar Dynamics Observatory with a nice profile view of its elongated loops stretching and swaying above it (Mar. 8-9, 2017).
When an active region rotated over to the edge of the sun, it presented NASA's Solar Dynamics Observatory with a nice profile view of its elongated loops stretching and swaying above it (Mar. 8-9, 2017).

Stretched Loops

On Sept. 10, 2017, NASA's Solar Dynamics Observatory, observed the Sun erupting with an X8 solar flare, one of the largest of the current solar cycle.
On Sept. 10, 2017, NASA's Solar Dynamics Observatory, observed the Sun erupting with an X8 solar flare, one of the largest of the current solar cycle.

Major Solar Flare

On Jan. 20, 2017, NASA's Solar Dynamics Observatory captured a small area of the sun highlighted three active region. Over half a day this active region sent dark swirls of plasma and bright magnetic arches twisting and turning above it.
On Jan. 20, 2017, NASA's Solar Dynamics Observatory captured a small area of the sun highlighted three active region. Over half a day this active region sent dark swirls of plasma and bright magnetic arches twisting and turning above it.

Gyrating Active Region

Flaring, active regions of our sun are highlighted in this image combining observations from several telescopes. During the observations, microflares went off, which are smaller versions of the larger flares that also erupt from the sun's surface.
Flaring, active regions of our sun are highlighted in this image combining observations from several telescopes. During the observations, microflares went off, which are smaller versions of the larger flares that also erupt from the sun's surface.

NuSTAR Stares at the Sun

This still image from an animation from NASA GSFC's Solar Dynamics Observatory shows dark strands of plasma hovering above the Sun's surface beginning to interact with each other in a form of tug of war over two and a half days (June 28-30, 2015).
This still image from an animation from NASA GSFC's Solar Dynamics Observatory shows dark strands of plasma hovering above the Sun's surface beginning to interact with each other in a form of tug of war over two and a half days (June 28-30, 2015).

Plasma Push and Pull

On May 9, 2016, Mercury passed directly between the Sun and Earth, making a transit of the Sun. Mercury transits happen about 13 times each century. NASA's SDO studies the Sun 24/7 and captured the eight-hour event.
On May 9, 2016, Mercury passed directly between the Sun and Earth, making a transit of the Sun. Mercury transits happen about 13 times each century. NASA's SDO studies the Sun 24/7 and captured the eight-hour event.

Mercury Transit Across the Sun

NASA's Solar Dynamics Observatory captured agnetic arcs of plasma that spiraled above two active regions held their shape fairly well over 18 hours on Jan. 11-12, 2017.
NASA's Solar Dynamics Observatory captured agnetic arcs of plasma that spiraled above two active regions held their shape fairly well over 18 hours on Jan. 11-12, 2017.

Organized Arches

An eruption from the surface of the sun is conspicuous in the lower left portion of this July 6, 2015, image from NASA's Earth-orbiting Solar Dynamics Observatory (SDO).
An eruption from the surface of the sun is conspicuous in the lower left portion of this July 6, 2015, image from NASA's Earth-orbiting Solar Dynamics Observatory (SDO).

Solar Activity Seen at Sunspot Site Tracked by Mars Rover

NASA's Solar Dynamics Observatory observed a small eruption on Oct. 18, 2017. The source of the blast was just out of sight beyond the edge of the sun.
NASA's Solar Dynamics Observatory observed a small eruption on Oct. 18, 2017. The source of the blast was just out of sight beyond the edge of the sun.

Quick Solar Outburst

A pair of substantial coronal holes were the most notable features on the Sun over the week of Mar. 28 - Apr. 2, 2015. The images were taken in a wavelength of extreme ultraviolet light by NASA GSFC's Solar Dynamics Observatory.
A pair of substantial coronal holes were the most notable features on the Sun over the week of Mar. 28 - Apr. 2, 2015. The images were taken in a wavelength of extreme ultraviolet light by NASA GSFC's Solar Dynamics Observatory.

Two Coronal Holes

NASA's Solar Dynamics Observatory took this close-up view of one day in the life of a rather small active region shows the agitation and dynamism of its magnetic field (Dec. 21, 2016).
NASA's Solar Dynamics Observatory took this close-up view of one day in the life of a rather small active region shows the agitation and dynamism of its magnetic field (Dec. 21, 2016).

Jumpy Active Region

NASA's Solar Dynamics Observatory observed the sun produced swirling prominence activity of both its side, one after the other, over two days (Dec. 7-8, 2016).
NASA's Solar Dynamics Observatory observed the sun produced swirling prominence activity of both its side, one after the other, over two days (Dec. 7-8, 2016).

Both Sides Now

NASA's Solar Dynamics Observatory compares very large coronal holes taken Oct. 27, 2016. Coronal holes are areas of open magnetic field that carry solar wind out into space, currently causing a lot of geomagnetic activity here on Earth.
NASA's Solar Dynamics Observatory compares very large coronal holes taken Oct. 27, 2016. Coronal holes are areas of open magnetic field that carry solar wind out into space, currently causing a lot of geomagnetic activity here on Earth.

Wavelength Comparison

The structure of the Sun's corona shows well in this image from NASA's Solar TErrestrial RElations Observatory (STEREO).
The structure of the Sun's corona shows well in this image from NASA's Solar TErrestrial RElations Observatory (STEREO).

Full Disk Image of the Sun, March 26, 2007

This side-by-side rendering of the Sun at the same time in two different wavelengths of extreme ultraviolet light helps to visualize the differing features visible in each wavelength (Dec. 10-11, 2015). This image is from NASA's Solar Dynamics Observatory
This side-by-side rendering of the Sun at the same time in two different wavelengths of extreme ultraviolet light helps to visualize the differing features visible in each wavelength (Dec. 10-11, 2015). This image is from NASA's Solar Dynamics Observatory

Comparing Wavelengths

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