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Astronomy Picture of the Day
  • The Long Tails of Comet NEOWISE Image Credit & Copyright: Petr Horalek @petrhoralek Explanation: This Comet NEOWISE (C/2020 F3) now sweeps through our fair planet's northern skies. Its long tails stretch across this deep skyview from Suchy Vrch, Czech Republic. Recorded on the night of July 13/14, the composite of untracked foreground and tracked and filtered sky exposures teases out details in the comet's tail not visible to the unaided eye. Faint structures extend to the top of the frame, over 20 degrees from the comet's bright coma. Pushed out by the pressure of sunlight itself, the broad curve of the comet's yellowish dust tail is easy to see by eye. But the fainter, more bluish tail is separate from the reflective comet dust. The fainter tail is an ion tail, formed as ions from the cometary coma are dragged outward by magnetic fields in the solar wind and fluoresce in the sunlight. Outbound NEOWISE is climbing higher in northern evening skies, coming closest to Earth on July 23rd.
This Day in History
  • Aerosmith and 50 Cent headline a $10 million bat mitzvah
    In exchange for a multimillion-dollar fee, Steven Tyler and Joe Perry of Aerosmith and rapper 50 Cent took to the stage at New York City’s famous Rainbow Room in the early morning hours of November 27, 2005, as headline performers at the $10 million bat mitzvah of Long Island 13-year-old ...Continue reading
  • Jimi Hendrix born
    Guitar legend Jimi Hendrix is born in Seattle. Hendrix grew up playing guitar, imitating blues greats like Muddy Waters as well as early rockers. He joined the army in 1959 and became a paratrooper but was honorably discharged in 1961 after an injury that exempted him from duty in Vietnam. In the ...Continue reading
  • Pope Urban II orders first Crusade
    On November 27, 1095, Pope Urban II makes perhaps the most influential speech of the Middle Ages, giving rise to the Crusades by calling all Christians in Europe to war against Muslims in order to reclaim the Holy Land, with a cry of “Deus vult!” or “God wills it!” Born Odo of Lagery in 1042, Urban ...Continue reading
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