· Get a Cloudy Nights T-Shirt · Submit a Review / Article Click here if you are having trouble logging into the forums Privacy Policy | Please read our Terms of Service | Signup and Troubleshooting FAQ | Problems? PM a Red or a Green Gu… uh, User You are not logged in. [Login] Entrance · Main Index · Search · New user · Who's Online FAQ · Calendar Equipment Discussions >> Reflectors Previous   Index   Next   Threaded   Pages: 1 lymorkiew45 Pooh-Bah Reged: 12/30/07 Loc: Surfing the galaxy... Observing Abell 1689       #2471039 - 06/19/08 11:01 PM Edit   Reply   Quote Quick Reply   Hello, has anyone ever seen this galaxy cluster in the constelation Virgo, it lies about 2 billion lys from Earth, and the brightest members, well I don't know, I can't find any estmates on the internet, these galaxies light are being warped from the galaxies in front, and there are thousands of galaxies in this cluster, and the farthest ones lies at 13 billion lys, the lense is about 2 million lys across, the background galaxies light looks like it's bent in pictures, and it creates the galaxies to look like rays or streaks, have you seen this object, and what is the minumum aperture that it can be detected?...clear skies...Jorgen Post Extras:       Starman1 Vendor (EyepiecesEtc.com) Reged: 06/24/03 Loc: Los Angeles Re: Observing Abell 1689 [Re: lymorkiew45]       #2471086 - 06/19/08 11:16 PM Edit   Reply   Quote Quick Reply   NED info: http://tinyurl.com/4ncaxr Brightest member around 17. I think this is a cluster for the really big scopes, like that 48.9" that just got installed down in Texas. Don Post Extras:       Mike B Starstruck Reged: 04/06/05 Loc: shake, rattle, & roll, CA Re: Observing Abell 1689 [Re: Starman1]       #2472026 - 06/20/08 12:00 PM Edit   Reply   Quote Quick Reply   Hmmmm... what about these image-intensifier devices? What kinda aperture, thusly equipped, would it take to visually discern this? Post Extras:       tatarjj Carpal Tunnel Reged: 04/20/04 Loc: Austin, TX Re: Observing Abell 1689 [Re: Mike B]       #2472187 - 06/20/08 12:59 PM Edit   Reply   Quote Quick Reply   This topic was started in both the reflectors and deep sky observing forum, and probably needs to be merged. Mike, ACO 1689 was visible in my 25" but not my 18", if that gives you any idea. Post Extras:       Mike B Starstruck Reged: 04/06/05 Loc: shake, rattle, & roll, CA Re: Observing Abell 1689 [Re: tatarjj]       #2472267 - 06/20/08 01:35 PM Edit   Reply   Quote Quick Reply   Thanks, John- i presume you mean using "standard" vision. My ? re: the image-intensifiers was the topic of another thread (Denk's new BVer intensifier, soon to be released- IIRC), so there's a whole lotta mergin' goin' on here! FWIW, i am in no way inclined to obtain such a device myself- 'tis not my bag- but was asking purely from curiosity. BTW, congrats on gettin' the 25-inch up & running! mike b Post Extras:       Pages: 1 Previous   Index   Next   Threaded   Extra information 22 registered and 29 anonymous users are browsing this forum. Moderator:  Jarad, ausastronomer, okieav8r  Print Thread Forum Permissions       You cannot start new topics       You cannot reply to topics       HTML is disabled       UBBCode is enabled Thread views: 341 Jump to *Announcements and News* -----   Cloudy Nights Announcements   Discussion of CN Articles, Reviews, and Reports   Celestial Events*General Astronomy* -----   Beginners Forum   General Observing and Astronomy   Outreach   Light Pollution*Equipment Discussions* -----   ATM, Optics and DIY Forum   Binoculars   Binoviewers   Cats & Casses   Classic Telescopes   Equipment   Eyepieces   Mounts   Observatories   Reflectors   Refractors    Video and Electronically Assisted Astronomy*Astrophotography and Sketching* -----   Beginning and Intermediate Imaging   Film Astrophotography   DSLR & Digital Camera Astro Imaging & Processing   CCD Imaging & Processing   Solar System Imaging & Processing   Sketching   Astro Imaging/Sketching Contest *Observing* -----   NEO   Planetary and Solar System Observing   Lunar Observing   Deep Sky Observing   Double Star Observing   Solar   Variable Star Observing and Radio Astronomy*Telescope Specific Forums* -----   Celestron NexStar    NexStar GPS / CPC Telescopes   Questar Forum   Meade ACF/RCX / LX / GPS    Meade ETX*Speciality Forums* -----   Arizona Science and Astronomy Expo   NEAF (Northeast Astronomy Forum) and NEAIC (Northeast Astro Imaging Conference)   AstroArt   Astronomy Clubs and Star Parties   Astronomy Software & Computers   AstroWebsites   Science! Astronomy & Space Exploration, and Others   Space Rocks   Stellar Media*Swap and Shop* -----   Shop and Swap Audio Components*CN Feedback and Vendor Announcements* -----   Vendor and Group Announcements*International Year of Astronomy 2009 - Forums are now closed.* -----   IYA Archive Info CN Forums Home

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