Insanely beautiful.
(Photo credit & copyright: Bud Kuenzli, via APOD.)
Auroras are occurring again with increasing frequency. With the Sun being unusually dormant recently, however, our Sun has become increasingly active and exhibiting a greater abundance of sunspots, flares, and coronal mass ejections. Solar activity like this typically expels charged particles into the Solar System, some of which may trigger Earthly auroras. As this year unfolded, the above timelapse displays of picturesque auroras were captured above Tromsø, Norway. Curtains of auroral light, usually green, flow, shimmer and dance as energetic particles fall toward the Earth and ionize air molecules high up in the Earth's atmosphere. With solar maximum still in the future, there may be opportunities to see spectacular aurora over the past three years, the amount of Sun-induced auroras has also been unusually low. More personally over the next three years.
From space, the aurora is a crown of light that circles each of Earth’s poles. The IMAGE satellite captured this view of the aurora australis (southern lights) on September 11, 2005, four days after a record-setting solar flare sent plasma—an ionized gas of protons and electrons—flying towards the Earth. The ring of light that the solar storm generated over Antarctica glows green in the ultraviolet part of the spectrum, shown in this image. The IMAGE observations of the aurora are overlaid onto NASA’s satellite-based Blue Marble image. From the Earth’s surface, the ring would appear as a curtain of light shimmering across the night sky.
The ship and sled team in this image belonged to Frederic Church's friend, polar explorer Dr. Isaac Hayes. Hayes had led an Arctic expedition in 1860, and gave his sketches from the trip to the artist as inspiration for this painting. Hayes returned from his voyage to find the country in the thick of the Civil War, and in a rousing speech vowed that "God willing, I trust yet to carry the flag of the great Republic, with not a single star erased from its glorious Union, to the extreme northern limits of the earth." Viewers understood Church's painting of the Aurora Borealis (also known as the northern lights) as a portent of disaster, a divine omen relating to the conflict.
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