Jess Ssek

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APOD: NGC 6960: The Witch's Broom Nebula (2013 May 29) Image Credit & Copyright: Martin Pugh http://apod.nasa.gov/apod/ap130529.html Explanation: Ten thousand years ago, before the dawn of recorded human history, a new light would have suddenly have appeared in the night sky and faded after a few weeks. Today we know this light was from a supernova, or exploding star, and record the expanding debris cloud as the Veil Nebula, a supernova remnant. This sharp telescopic view is centered on a western segment of the Veil Nebula cataloged as NGC 6960 but less formally known as the Witch's Broom Nebula. Blasted out in the cataclysmic explosion, the interstellar shock wave plows through space sweeping up and exciting interstellar material. Imaged with narrow band filters, the glowing filaments are like long ripples in a sheet seen almost edge on, remarkably well separated into atomic hydrogen (red) and oxygen (blue-green) gas. The complete supernova remnant lies about 1400 light-years away towards the constellation Cygnus. This Witch's Broom actually spans about 35 light-years. The bright star in the frame is 52 Cygni, visible with the unaided eye from a dark location but unrelated to the ancient supernova remnant. http://www.martinpughastrophotography.id.au/ Starship Asterisk* • APOD Discussion Page http://asterisk.apod.com/discuss_apod.php?date=130529 Starship Asterisk* • On This Day in APOD http://asterisk.apod.com/view_retro.php?date=0529

APOD: PanSTARRS Anti-Tail Grows (2013 May 26) Image Credit & Copyright: Joseph Brimacombe http://apod.nasa.gov/apod/ap130526.html Explanation: As planet Earth approached the plane of the Comet PanSTARRS (C/2011 L4) orbit on May 23rd, comet watchers were treated to this view of its magnificent anti-tail. The long, narrow anti-tail stretches to the right across this frame for nearly 4 degrees or about 8 times the angular size of the full Moon. The tail trails along the comet's orbit as it leaves the inner solar system behind. An almost edge-on perspective from near the outbound comet's orbital plane enhances the view of the anti-tail and makes it seem to point in the sunward direction, only apparently contrary to the behavior of comet dust tails pushed outward by the pressure of sunlight. Sweeping far north in planet Earth's skies, the comet is up all night for most of the northern hemisphere, but now bright moonlight interferes with its visibility. PanSTARRS anti-tail is one of the longest since the appearance of Comet Arend-Roland in 1957. http://www.flickr.com/photos/43846774@N02/ Starship Asterisk* • APOD Discussion Page http://asterisk.apod.com/discuss_apod.php?date=130526 Starship Asterisk* • On This Day in APOD http://asterisk.apod.com/view_retro.php?date=0526

August guide to the bright planets

In August 2018, 4 planets arc across the evening sky. From west to east as night falls, these bright worlds are Venus, Jupiter, Saturn and Mars. Late …

Astronomy

Birdbooker Report 271

<i>Books to the ceiling,<br>Books to the sky,<br>My pile of books is a mile high.<br>How I love them! How I need them!<br>I'll have a long beard by the time I read them.</i><p>…

Check out these mammatus clouds

Mammatus clouds can appear ominous. But, in a way that’s so common in nature, their dangerous aspect goes hand in hand with a magnificent …