by APOD Robot » Fri Oct 28, 2011 4:06 am
October Skylights
Explanation: As northern hemisphere nights grow longer,
October is a good month for spotting auroras, or even other
eerie apparitions after dark. And this week the night sky did not disappoint. On October 24th a solar
coronal mass ejection impacted planet Earth's magnetosphere triggering far ranging auroral displays. On that night,
this dramatic silhouette against deep red and beautiful green curtains of shimmering light was captured near Whitby, Ontario, Canada. But
auroras were reported even farther south, in US states like Alabama, Kansas, and
Oklahoma at latitudes rarely haunted by the northern lights. Well above 100 kilometers, at the highest altitudes infused by the auroral glow, the
red color comes from the excitation of oxygen atoms.
[/b]
[url=http://apod.nasa.gov/apod/ap111028.html][img]http://apod.nasa.gov/apod/calendar/S_111028.jpg[/img] [size=150]October Skylights[/size][/url]
[b] Explanation: [/b] As northern hemisphere nights grow longer, [url=http://science.nasa.gov/science-news/science-at-nasa/2001/ast26oct_1/]October is a good month[/url] for spotting auroras, or even other [url=http://apod.nasa.gov/apod/ap021031.html]eerie apparitions[/url] after dark. And this week the night sky did not disappoint. On October 24th a solar [url=http://apod.nasa.gov/apod/ap070206.html]coronal mass ejection[/url] impacted planet Earth's magnetosphere triggering far ranging auroral displays. On that night, [url=http://www.photopark.ca/Fun/Aurora-2011/19724169_8sKvsV#1549951009_mLqCxjD]this dramatic silhouette[/url] against deep red and beautiful green curtains of shimmering light was captured near Whitby, Ontario, Canada. But [url=http://www.spaceweather.com/aurora/gallery_01oct11_page2.htm]auroras were reported[/url] even farther south, in US states like Alabama, Kansas, and [url=http://spaceweather.com/submissions/large_image_popup.php?image_name=Peter-Henshaw-aurora_1319584532.jpg]Oklahoma[/url] at latitudes rarely haunted by the northern lights. Well above 100 kilometers, at the highest altitudes infused by the auroral glow, the [url=http://odin.gi.alaska.edu/FAQ/#color]red color comes[/url] from the excitation of oxygen atoms.
[b][table][tr][td=left][url=http://asterisk.apod.com/discuss_apod.php?date=111027]<< Previous APOD[/url][/td][td=center][url=http://asterisk.apod.com/viewforum.php?f=9]Discuss Any APOD[/url][/td] [td=right][url=http://asterisk.apod.com/discuss_apod.php?date=111029]Next APOD >>[/url][/td][/tr][/table][/b]