Al Grauer Archive
Oct 31st: Future Impact Possibilities & The Oceans of Ganymede

Sep 12th: Defending Earth & Noctilucent Clouds

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International Asteroid Warning Network has been established to link scientists who are discovering, monitoring, and physically characterizing potentially dangerous asteroids.
Noctilucent Clouds exist at more than 50 miles above the Earth’s surface or about 4 times higher than the tops of the most intense tropical thunder storms.

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The 365 Days of Astronomy podcast launched in 2009 as part of the International Year of Astronomy. This community podcast continues to bring you day after day of content across the years. In 2013, we evolved to add video, and in 2015 we joined the International Year of Light.

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