by APOD Robot » Wed Sep 27, 2017 4:09 am
Layers of a Total Solar Eclipse
Explanation: Neither rain, nor snow, nor dark of night can keep a space-based spacecraft from
watching the Sun. In fact, from its vantage point 1.5 million kilometers sunward of planet Earth, NASA's
SOlar Heliospheric Observatory (SOHO) can always
monitor the Sun's outer atmosphere, or
corona. But only during a total solar
eclipse can Earth-based observers also see the
lovely coronal streamers and structures - when the Moon briefly blocks the overwhelmingly bright solar surface. Then, it becomes possible to follow detailed
coronal activity all the way down to the Sun's surface. In the outside layer of this composite image, SOHO's uninterrupted view of the
solar corona during
last month's eclipse is shown in orange hues. The middle, donut-shaped region is
the corona as recorded by the
Williams College Eclipse Expedition to
Salem, Oregon. Simultaneously, the inner view is from NASA's Earth-orbiting
Solar Dynamics Observatory, which, being
outside of totality, was able to image the face of the Sun in extreme
ultraviolet light, shown in gold.
[/b]
[url=https://apod.nasa.gov/apod/ap170927.html][img]https://apod.nasa.gov/apod/calendar/S_170927.jpg[/img] [size=150]Layers of a Total Solar Eclipse[/size][/url]
[b] Explanation: [/b] Neither rain, nor snow, nor dark of night can keep a space-based spacecraft from [url=https://apod.nasa.gov/apod/ap051201.html]watching the Sun[/url]. In fact, from its vantage point 1.5 million kilometers sunward of planet Earth, NASA's [url=https://sohowww.nascom.nasa.gov/about/about.html]SOlar Heliospheric Observatory[/url] (SOHO) can always [url=https://sohowww.nascom.nasa.gov/data/realtime-images.html]monitor[/url] the Sun's outer atmosphere, or [url=https://en.wikipedia.org/wiki/Corona]corona[/url]. But only during a total solar [url=https://eclipse2017.nasa.gov/eclipse-who-what-where-when-and-how]eclipse[/url] can Earth-based observers also see the [url=https://apod.nasa.gov/apod/ap170813.html]lovely coronal streamers and structures[/url] - when the Moon briefly blocks the overwhelmingly bright solar surface. Then, it becomes possible to follow detailed [url=https://apod.nasa.gov/apod/ap170920.html]coronal activity[/url] all the way down to the Sun's surface. In the outside layer of this composite image, SOHO's uninterrupted view of the [url=https://solarscience.msfc.nasa.gov/corona.shtml]solar corona[/url] during [url=https://eclipse2017.nasa.gov/]last month's eclipse[/url] is shown in orange hues. The middle, donut-shaped region is [url=http://www.phy6.org/Education/wcorona.html]the corona[/url] as recorded by the [url=http://sites.williams.edu/eclipse/2017-usa/]Williams College Eclipse Expedition[/url] to [url=https://en.wikipedia.org/wiki/Salem,_Oregon]Salem, Oregon[/url]. Simultaneously, the inner view is from NASA's Earth-orbiting [url=https://www.nasa.gov/mission_pages/sdo/main/index.html]Solar Dynamics Observatory[/url], which, being [url=https://i.pinimg.com/originals/ec/b1/b7/ecb1b745b328ab2f14212afd0578f0b9.jpg]outside[/url] of totality, was able to image the face of the Sun in extreme [url=https://science.nasa.gov/ems/10_ultravioletwaves]ultraviolet[/url] light, shown in gold.
[b][table][tr][td=left][url=http://asterisk.apod.com/discuss_apod.php?date=170926]<< Previous APOD[/url][/td] [td=center][url=http://asterisk.apod.com/view_retro.php?date=0927]This Day in APOD[/url][/td] [td=right][url=http://asterisk.apod.com/discuss_apod.php?date=170928]Next APOD >>[/url][/td][/tr][/table][/b]