NASA Image Of The Day

Extreme Ultraviolet Image of a Significant Solar Flare
NASA Image Of The Day
The sun emitted a significant solar flare on Oct. 19, 2014, peaking at 1:01 a.m. EDT. NASA's Solar Dynamics Observatory, which is always observing the sun, captured this image of the event in extreme ultraviolet wavelength of 131 Angstroms ? a wavelength that can see the intense heat of a flare and that is typically colorized in teal. This flare is classified as an X1.1-class flare. X-class denotes the most intense flares, while the number provides more information about its strength. An X2 flare is twice as intense as an X1, and an X3 is three times as intense. Solar flares are powerful bursts of radiation. Harmful radiation from a flare cannot pass through Earth's atmosphere to physically affect humans on the ground, however -- when intense enough -- they can disturb the atmosphere in the layer where GPS and communications signals travel. > More: NASA's SDO Observes an X-class Solar Flare Image Credit: NASA/Solar Dynamics Observatory...
20 Oct 2014
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1 Expedition 41 - Space Station Live - October 20 Administrator 26
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6 NASA Science Briefing - Comet Siding Spring Administrator 134
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9 NASA Teleconference - NuSTAR Discovery Administrator 160
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12 Expedition 41 - Space Station Live - October 6 Administrator 117
13 Expedition 41 - U.S. Spacewalk Overview 28 Administrator 238
14 Expedition 41 - U.S. Spacewalk Overview 27 Administrator 245
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16 Expedition 41 - Space Station Live - October 3 Administrator 171
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19 Expedition 41 - Space Station Live - September 30 Administrator 191
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21 Expedition 41 - Space Station Live - September 26 Administrator 197
22 Expedition 41/42 Soyuz TMA-14M - Hatch Opening and Other Activities Administrator 414
23 Expedition 41/42 Soyuz TMA-14M - Docking Administrator 332
24 Expedition 41/42 Soyuz TMA-14M - Launch Replays Administrator 217
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