Daniel Pasternak 10 Sept 2017 7d 1c - a photo on Flickriver

Daniel Pasternak 10 Sept 2017 7d 1c

www.flickr.com/photos/92681330@N06/sets/72157685448241582 Rank 447

The Crescent Nebula (also known as NGC 6888, Caldwell 27, Sharpless 105) is an emission nebula in the constellation Cygnus, about 5000 light-years away from Earth. It was discovered by Friedrich Wilhelm Herschel in 1792.[2] It is formed by the fast stellar wind from the Wolf-Rayet star WR 136 (HD 192163) colliding with and energizing the slower moving wind ejected by the star when it became a red giant around 250,000[3] to 400,000[citation needed] years ago. The result of the collision is a shell and two shock waves, one moving outward and one moving inward. The inward moving shock wave heats the stellar wind to X-ray-emitting temperatures.

It is a rather faint object located about 2 degrees SW of Sadr. For most telescopes it requires a UHC or OIII filter to see. Under favorable circumstances a telescope as small as 8 cm (with filter) can see its nebulosity. Larger telescopes (20 cm or more) reveal the crescent or a Euro sign shape which makes some to call it the "Euro sign nebula".

Taken on: September 18, 2017

Sets appears in: • In Flickr Explore • 1000+ View Album more » • 5,000 + View Album « less

Groups appears in: • FlickrCentral • Canon DSLR User Group more » • Photography • canon photography • Artistic Photography • Flickr Addicts • The Light Fantastic • Your Postcard Shot • I Love My Canon • ~Nature Beauty~ • !FlickrSoup for Soul • Amateurs • Night Photography • After Dark - Night Photography • Night Shots* • Astronomy • The Night Shots • PHOTOGRAPHERS OF CANADA • Flickritis: over 87,000 waiting for a vaccine. • - I LOVE NATURE - • Canon EOS • FlickrToday (only 1 pic per day) • Total Photography (No AI or SL) • the skies above • Nature Photography • Nice pictures • No-Flash Night Shots • ThE sKy'S tHe LiMiT • ANYTHING ALLOWED!!!!!! • Now That's Sky • Fire in the Sky from the Sun! • The Sky- We Are Expanding!!! • Awesome Nature • canon digital photography. • The World Through My Eyes ... • Nature Heals the Soul • Canon Digital • Deep Space Astrophotography • Canon DSLR 中文版 • SKY IS CREATIVE, I'm Not ! • Canon EOS SLR • Amateur Astronomy • Nocturnes - Night Photography • Canon Camera • Nature and Photography • Natural PATTERNS, Shapes, and Textures (curated) • You Think this is Art • TMI: your ART & NATURE **NO PEOPLE OR MAN-MADE OBJECTS** P1♥C1 • The Beauty of Nature • Clouds and Anything Else...Home of the clouds ! • Beautiful Capture • One Of A Kind • "Exemplary Shots - Flickr's BEST! (Post 1 Award 3)" • Astro-Photography and Similars • Your Best Photography • Canon Camera Users - pictures with EXIF • Astronomy, Stars, Planets and Space • Flickriver • Absolut Sky • *THE PERFECT PHOTOGRAPHER (P1/A2) • Creative Photo Group_ BASIC (P1-C3) • Nature...Anything Goes • NATURE'S BEST • Special Skies • Night and darkness • Canon freak • nature's composition • Official National Geographic Group • Sky As A Canvas ~ ~ ~ • Astronomy for all • Night shooters • 天空的影像-belief in the sky • *sensational sky...looking up!* • The Sky Theme - Post 1, Award 3 - Sweeper Active • Flickr's Biggest Group • Inspirational Photography • National Geographic Wild Life • National Geographic | World Wide • Canon After Dark • Canon SLR • Insight Astronomy Photographer of the Year • CANON-NO LIMIT • Canon DSLR Photography Beginners • ***Flickr Global • Black in the Back • National Geographic Group • Everything Sky • Astronomy Photos • Henry's Photo Club • BBC Sky at Night and Stargazing Live • moon and sky photographs • Flickr OBSESSION' • Astrofotógrafos del Mundo / World´s Astrophotographers • ` FLICKR ´ • Sky Camera with Flickr • Backyard Astrophotography • We Shoot RAW • Canon EOS Cameras. • Photographers from around the world • in explore • Amateur Astro-Photography • CANON DSLR EXPERIENCE - (TR) - • Magic of Photography • Canon Users DSLR • Astrophotography - The Solar System and Beyond • Nature and all that is beautiful • Noctis • Canon DSLR WorldWide • This is Why I Bought A Camera • THE IMAGINATIVE CAMERA • Specialistz™ • Group for all users of FLICKR - No 30/60 Groups Limit • Momentos para no olvidar • flickr oscar - level 2 • Solo Imaginacion « less

Stats: 11,615 views / 6 comments

Link to this photo view:
Link to this photo large view: