... Blue Moon Eclipse . ... Not a Blue Moon . ... Dust and the Helix Nebula . ... The eerie Spitzer Space Telescope image shows infrared radiation from the well-studied Helix Nebula (NGC 7293) a mere 700 light-years away in the constellation Aquarius. ... Big, beautiful spiral galaxy M101 is one of the last entries in Charles Messier's famous catalog, but definitely not one of the least. About 170,000 light-years across, this galaxy is enormous, almost twice the size of our own Milky Way Galaxy. ...

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... 2009 December 28 . Barred Spiral Galaxy NGC 6217 . Credit: NASA , ESA , and the Hubble SM4 ERO Team . Explanation: Many spiral galaxies have bars across their centers. ... Prominently barred spiral galaxy NGC 6217, pictured above , was captured in spectacular detail in this recently released image taken by the newly repaired Advanced Camera for Surveys on the orbiting Hubble Space Telescope . ... Note: An APOD editor will review great space images on 2010 Jan. 14 in Houghton, Michigan. ...

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• APOD: 2009 December 26 - M51 Hubble Remix
• APOD: 2010 December 23 - The Solstice Moon s Eclipse
• APOD: December 9, 1998 - NGC 253: The Sculptor Galaxy

... STScI-PRC97-38b HUBBLE'S PLANETARY NEBULA GALLERY [Top left] - IC 3568 lies in the constellation Camelopardalis at a distance of about 9,000 light-years, and has a diameter of about 0.4 light-years (or about 800 times the diameter of our solar system). ... Credits: Howard Bond (Space Telescope Science Institute), Robin Ciardullo (Pennsylvania State University) and NASA [Top center] - NGC 6826's eye-like appearance is marred by two sets of blood-red "fliers" that lie horizontally across the image. ...

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• http://www.arcetri.astro.it/~palla/ANDREAIMMAGINI/Stelle/Gl623b.txt
• http://www.arcetri.astro.it/~palla/ANDREAIMMAGINI/ISM/ghostly.txt
• http://www.arcetri.astro.it/~palla/ANDREAIMMAGINI/Cosmologia/Magnyfing.txt

... The European HST Archive has been moved to ESA's European Space Astronomy Centre ( ESAC ), Spain, where most of ESA's Space Science Archives are located and operated from. ... The Space Telescope European Coordinating Facility (ST-ECF), jointly operated by ESA and the European Southern Observatory ( ESO ) was, until the end of 2010, the European HST science facility, supporting the European astronomy community in exploiting the research opportunities provided by the Hubble Space Telescope. ...

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ECLIPSES, TRANSITS OF MERCURY AND VENUS . Year 1999 . Year 2000 . Year 2001 . Year 2002 . Year 2003 . Year 2004 . Year 2005 . ... Total solar eclipse . ... Transit of Mercury across the solar disk . ... Total lunar eclipse . ... Partial solar eclipse . ... Partial lunar eclipse . ... Annular solar eclipse . ... Penumbral lunar eclipse . ... big map . ... Transit of Venus across the solar disk . ... Annular-total solar eclipse . ... Non-central annular solar eclipse . ...

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... Tonight's Sky . ... Sky this Month . ... Star Atlas . Product Reviews . ... stars . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Sky this Week . ... Astronomy for Kids . ... Hubble offers a dazzling view of the Necklace Nebula . ... The object, aptly named the Necklace Nebula, is a recently discovered planetary nebula, the glowing remains of an ordinary, Sun-like star. ... Only registered members of Astronomy.com are allowed to comment on this article. ...

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• Total lunar eclipse, December 21, 2010 | Astronomy.com
• Hubble observes the hidden depths of M77 | Astronomy.com
• Hubble observes a dwarf galaxy with a bright nebula | Astronomy.com

... The highlight of the month is the total eclipse of the Moon during the night of December 20/21. ... Listed below are some of the key events, and the times they will occur, during December's total lunar eclipse. ... The eclipse is also visible in its entirety from Alaska (local time is UT тАУ 9 hours) and Hawaii (UT тАУ 10 hours), but be aware that most of the eclipse occurs on the 20th in these two regions. ... Penumbral Eclipse Begins . ... Partial Eclipse Begins . ... Total Eclipse Begins . ...

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• ASP: Shadow Play: 1998's Total Solar Eclipse
• ASP: Star Science in the Autumn Sky
• ASP: Australia?s 2002 Total Eclipse of the Sun

... Armagh Planetarium . ... Universe . ... January . ... Posted on January 21, 2011 | No Comments Don Pollacco, a research astronomer at Queens University Belfast, came to Armagh Planetarium to give a fascinating talk on exoplanets in January 2011. ... No Comments Armagh Planetarium kicked off 2011 in style with some amazing astronomy-based events in association with the€а BBC. Sinead McNicholl has a personal report of our part in the exciting Stargazing [ ] . ... Newer Entries . ...

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• Wonders of the December Sky | Astronotes
• Nick Parke | Astronotes - Part 2
• Viewing the Partial Solar Eclipse of 20 March 2014 | Astronotes

... The expansion is measured as a number called the Hubble Constant . ... Our value is about 20% lower than the one got with the Hubble Space Telescope in 1994," said Dr Jim Lovell, leader of the team that made the measurement. The Hubble Constant is named after American astronomer Edwin Hubble, who in the 1920s found that other galaxies were moving away from ours. ... The Hubble Constant links the galaxy's distance with its speed." ... A short run-down on the Hubble Constant: . ...

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• Eclipse

... It's life Jim, but not as we know it - Tuesday 2 December 2008 . ... God and the Universe: Thursday 20 November 2008 . John O'Neill will give a lecture to the IAS in Dunsink Observatory, Castleknock, Dublin, on Monday 1st, at 8 p.m. Entitled "Wonderful Eclipses: The Greatest Saros", it will look at some of the best total solar eclipses to be seen. Monday, 1 December 2008 12:42 . International Year of Astronomy, Ireland National Node . ...

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• Lunar Eclipse of 31 December 2009 | International Year of Astronomy in Ireland
• Armagh Observatory
• Partial Lunar Eclipse: 31 December 2009 | International Year of Astronomy in

... HUBBLE UNCOVERS DUST DISK AROUND A MASSIVE BLACK HOLE . Resembling a gigantic hubcap in space, a 3,700 light-year-diameter dust disk encircles a 300 million solar-mass black hole in the center of the elliptical galaxy NGC 7052. ... Because the jets in NGC 7052 are not perpendicular to the disk, it may indicate that the black hole and the dust disk in NGC 7052 do not have a common origin. ... NGC 7052 is located in the constellation of Vulpecula, 191 million light-years from Earth. ...

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• The Hubble Deep Field
• STScI Preprint #1204
• HDF-S Data Products

In this gallery are many images of Low Surface Brightness Galaxies which have recently been discovered and analyzed. ... The central surface brightness of this galaxy is 24.28 . Malin 2 This galaxy is another huge disk galaxy with a scale length of 15 kpc and a redshift of 15000 km/a. The high surface brightness knot in one of its spiral arms actually has the same color, luminosity and H-alpha equivalent width as the entire Large Magellanic Cloud . ... Truly it is a Low Surface Brightness Galaxy. ...

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• galaxies, Hubble sequence
• Astronomy Plus CCD Images of Galaxies

ADC CATALOG HOLDINGS SHORT TITLE LIST March 29, 2002 (adapted from ftp://adc.gsfc.nasa.gov/pub/adc/archives/catalogs/key) Category 1: Astrometric and Positional Data - March 29, 2002 1090 Positions of 502 Stars in Pleiades Region (Eichhorn+ 1970) 1107A Washington Cat Visual Double Stars 1984.0 (Worley, Douglass 1984) 1131A SAO Star ...

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... V838 Mon is a member of a new class of eruptive variables which appear as a peculiar novae having late K-M type spectra in their outburst. Before its outburst, it was a wide binary system of B3V type stars. ... The B3V companion was seen in the outburst in the UV spectrum taken with HST (Rauch et al., ... In the latest spectra, the light of B3V companion was predominating in the short-wave photometric bands. ... CCD blue frames of V838 Mon before the eclipse (left) and in the eclipse (right). ...

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... Articles | ... Forums . ... 230 deg . 49 deg . ... 130 deg . ... More Info . ... 210 deg . ... 168 deg . ... 249 deg . ... 195 deg . ... 271 deg . ... 110 deg . ... 338 deg . ... July 15 . 247 deg . ... 224 deg . ... 340 deg . ... July Phoenicids (PHE) . ... August 10 . 341 deg . ... 339 deg . ... 307 deg . ... 334 deg . ... 335 deg . ... 286 deg . ... 327 deg . ... 262 deg . ... 102 deg . ... 153 deg . ... 117 deg . ... December 2 . ... 123 deg . ... 100 deg . ... www.astronomy.net . ...

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• Eclipse99, AstroGuide Listing
• Articles written by astronomers for astronomers of all ages.
• You Can Make Stellar Images Brighter - an Astronomy Net Article

... ESO, the European Southern Observatory . ... Travel and Contacts . Travel to ESO Headquarters . ... ESO Acronyms . ... Survey Telescopes . ... Galaxy Clusters . ... Star Clusters . ... Stars@ESO . ... ESO 3.6-metre telescope . ... This video pan sequence gives a close-up view of one of the brightest star clusters in the sky. This image from the Wide Field Imager on the MPG/ESO 2.2-metre telescope at ESOтАЩs La Silla Observatory in Chile, shows Messier 7, also known as NGC 6475. ... 180.0€аMB . ...

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• Feeding the Monster | ESO
• A unusual double star in the constellation of Lepus | ESO
• Eclipsed Moon, Striking Night Sky | ESO

... Home Gallery Astrophotography Urban Lunar Eclipses . ... Beyond New York City . ... Observing Resources for Amateur Astronomers - Part 1: Beginning Observers . ... A History of the First Forty Years of the Amateur Astronomers Association . ... Several lunar eclipses have been visible from the New York area as these photographs from AAA members show. ... Penumbral lunar eclipse, New York City . ... 2016 Amateur Astronomers Association of New York Designed by Press Customizr Powered by . ...

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• Solar Bridge Across New York Harbor ? Amateur Astronomers Association of New
• Astro Imaging Workshop: Planetary Astro Imaging with a DSLR ? December 7, 2014
• Tale-of-2-Transits, 2012 Annular Eclipse and Transit of Venus ? Amateur

The apparent path of the Sun across the sky. ... The path of the Sun across the celestial sphere is very close to that of the planets and the moon. ... In one year, as the Earth completes a full circuit around the Sun (drawing above), the Earth-Sun line and its continuation past Earth sweep the entire plane. ... Since the Sun and Earth are in the plane of the ecliptic, the line is automatically in that plane too; if the moon is also on the same line, it must be in the plane of the ecliptic as well. ...

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• Jupiter's Moon Ganymede
• Comet Introduction
• Pluto and Charon

... StarCalc Home Page - Downloads . ... File . StarCalc (English version) . ... With minimal configuration, version 5.72 of StarCalc includes the next interfaces: "Horizon", "Horizontal coordinategrid", "Equatorial coordinate grid", "Constellation boundaries", "Constellation lines", "Constellation names", "Star proper names", "Bright Star Catalog", "Deep-sky objects", "Sun", "Moon" and "Planets and satellites" . Plugins for StarCalc . ... Interface to NGC 2000 (plugin + catalog file) . ...

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... Bad Astronomy . ... Mad Science . ... if hubble was pointed at earth, what could it resolve? is it too bright? ... This type of image is called a ``flat field'', because you want the field of view to look as flat as possible. In space there aren't any flat fields you can use, but we do have one right here: the Earth. ... It takes a lot of sophisticated computer processing to turn this into a real flat field for Hubble to use, but luckily there are a lot of smart people working on the problem. ...

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• Phil Plait's Bad Astronomy: Bitesize Astronomy
• Phil Plait's Bad Astronomy: Info
• Phil Plait's Bad Astronomy: Misconceptions