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Messier Monday: The Closest Messier Original, M39

"Books serve to show a man that those original thoughts of his aren't very new at all." -Abraham Lincoln
It might be Veterans Day / Armistice Day all around the world, but it's still Messier Monday here on Starts With A Bang! We may have been fighting wars for all of human history, but nearly all of the 110 deep sky objects that make up the Messier Catalogue go back long before that. ....

Tenho Tuomi , Abraham Lincoln , Heidi Schweiker , John Jc Mirtle , Marcin Paciorek , Thomas Henne , National Optical Astronomy Observatories , Micron All Sky , Veterans Day , Armistice Day , Messier Monday , Starts With , Messier Catalogue , Tuomi Observatory , European Southern Observatory , Jim Mazur , Cloudy Nights , Killer Rabbit , Two Micron All Sky Survey , National Optical Astronomy ,

Bad Astronomy | Dust cloud vdB 31 illuminated by AB Aurigae


When stars die, sometimes after billions of years of creating energy and light in their cores, they can bloat up into swollen red giants, enormous and luminous objects. Silicon and carbon in their upper layers can blow out into the space around them, cooling and condensing into grains of material astronomers call
dust.
The galaxy is littered with dense clouds of dust, blocking our view of stars behind them due to their opacity. They can appear brown or black, like holes in space, dark and forbidding.
But dust also appears in clouds where stars are being born, and sometimes these infant stars are massive and blue, sending out vast amounts of energy into their birth nebula. And when they do the dust around them reflects that light, sending some of it Earthward, and we see those clouds not as voids but as lustrous, cerulean, even gossamer cosmic threads. ....

Adam Block , P Kalas Stsc , M Clampin Stsc , D Lindler Acc Inc , Ca Grady National Optical Astronomy Observatories , A Boggess Catholic University Of America , Mount Lemmon , National Optical Astronomy Observatories , Catholic University , Hubble Space Telescope , Very Large Telescope , Bad Astronomy , பண்படாமனித இயல்பு தொகுதி , சிஏ கிரேடி தேசிய ஒளியியல் வானியல் அவதானிப்புகள் , ஏற்ற எலுமிச்சை , தேசிய ஒளியியல் வானியல் அவதானிப்புகள் , கத்தோலிக் பல்கலைக்கழகம் , ஹப்பிள் இடம் தொலைநோக்கி , மிகவும் பெரியது தொலைநோக்கி , மோசமான வானியல் ,