... M16: Dust and an Open Cluster . ... Comet Hale-Bopp Update . ... Will comet Hale-Bopp become the brightest comet of the Century in early 1997? ... As the radioactive elements decay, they produce gamma-rays. ... Aurora Astern . ... The aurora, also known.. Painting with Solar Neutrons . ... During an intense solar flare on June 15, 1991, a spray of solar neutrons was detected by the COMPTEL instrument onboard NASA's Compton Gamma Ray Observatory. A Total Solar Eclipse . ... Gamma-Ray Quasars . ...

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... Tonight's Sky . ... The Magazine . ... Observing . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . ... Bright planets meet at dusk . ... Astronomy magazine subscribers can read the full article for free. ... Get instant access to subscriber content on Astronomy.com! ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter....

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• Jupiter brightens the December sky | Astronomy.com
• Total lunar eclipse, December 21, 2010 | Astronomy.com

... 2000 December 24 . NGC 1850: Gas Clouds and Star Clusters . ... Globular clusters as young as NGC 1850 don't exist here. ... Below and right of the main group of stars known as NGC 1850 A is a smaller, still younger group dubbed NGC 1850B . This cluster is made of stars only about four million years old. The large red cloud of gas surrounding the clusters may have been predominantly created by supernovae explosions of stars in the younger cluster. ... About APOD | ...

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• APOD: 2012 December 6 - 47 Tuc Near the Small Magellanic Cloud
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• APOD: 2014 October 8 - NGC 6823: Cloud Sculpting Star Cluster

... STScI-PRC00-36 GHOSTLY REFLECTIONS IN THE PLEIADES NASA's Hubble Space Telescope has caught the eerie, wispy tendrils of a dark interstellar cloud being destroyed by the passage of one of the brightest stars in the Pleiades star cluster. ... In 1890, American astronomer E. E. Barnard, observing visually with the Lick Observatory 36-inch telescope in California, discovered an exceptionally bright nebulosity adjacent to the bright Pleiades star Merope. ...

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• Arcetri Star-Formation Group Publications
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• APOD: December 18, 1999 - Irregular Galaxy Sextans A

... 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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... Harald Ebeling, University of Hawaii . A Snapshot Survey of The Most Massive Clusters of Galaxies . Abstract . ... Stephan McCandliss, The Johns Hopkins University . ... HST Imaging of UV emission in Quiescent Early-type Galaxies . ... Distances to Eclipsing M Dwarf Binaries . ... SL2S: The Strong Lensing Legacy Survey . ... Hubble Investigation of Asteroid 21 Lutetia in Support of the Rosetta Mission Flyby . ... GO 11289: SL2S - The Strong Lensing Legacy Survey . ... Past weeks: . ...

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• Dust Around Stars
• HST this week: 343
• HST this week: 331

... The Pleiades star cluster, also known as the Seven Sisters and Messier 45, is a conspicuous object in the night sky with a prominent place in ancient mythology . ... The stars in the Pleiades are thought to have formed together around 100 million years ago, making them 1/50th the age of our sun, and they lie some 130 parsecs (425 light years ) away. ... Data for these stars are listed in a table below. ... Yes . ... WEBDA Pleiades cluster data . ... M45: The Pleiades Star Cluster (2007 November 18) ...

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• Pulsar Highlights - A Dozen new MSPs in Globular Clusters
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From: TerryMosel aol.com Date: 11 December 2007 01:47:08 GMT Subject: Comet Holmes, Lecture Hi all, 1. COMET HOLMES: On the way back from the IYA meeting (more on this later), and the AI lecture, in Dublin, Miruna Popescu I stopped at a dark site North of Newry in a lovely clear transparent sky, for a look at P/Holmes. Amazing! ... But it was both brighter bigger that the Double Cluster in Perseus - about a magnitude brighter, I would say, and much bigger than the Moon. ...

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• No eclipses, but... | International Year of Astronomy in Ireland | Astronomy
• Wonderful Eclipses: The Greatest Saros - Monday 1 December 2008 | International
• Lunar Eclipse of 31 December 2009 | International Year of Astronomy in Ireland

.

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• Infrared/visible-light crossfade view of the star cluster NGC 6520 and the dark

Having studied the solar corona and its radio emissions sunspot cycles ago, I was keen to verify its existence optically during the total solar eclipse of Wednesday, 4 December 2002, the first on Australian soil since 1976. The moon's shadow was to travel from the south-Atlantic west of The Congo, across southern Africa, the Indian Ocean and into the Great Australian Bight, finally making Australian landfall at Ceduna, South Australia (SA). ... The favoured site to observe the eclipse was Ceduna. ...

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• Pulsar Group Main/Visitors
• The HIPASS Bright Galaxy Catalog
• ATNF Daily Astronomy Picture

... galaxies: bulges galaxies: clusters: general galaxies: clusters: individual: . ... star formation statistics stellar content structure Cosmology ( cosmology :) cosmic background radiation ( cosmology :) cosmological parameters cosmology : miscellaneous cosmology : observations cosmology : theory ( cosmology :) dark ages, reionization, first stars ( cosmology :) dark energy ( cosmology :) dark matter ( cosmology :) diffuse radiation ( cosmology :) distance scale ( cosmology :) early Universe (...

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• Solar eclipse 2015
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Astronotes Armagh Planetarium's Stellar Blog! ... Space Flight . ... Posted on September 11, 2015 | ... Continue Reading.. ... No Comments Peer deep into the constellation Sagittarius and you will find a spectacular young star cluster and its associated stellar nursery. ... Posted on September 14, 2012 | ... No Comments Our Image of the Month was released to celebrate the 22nd anniversary of the NASA/ESA Hubble Space Telescope and is a striking panoramic look at a stellar nursery which is [ ] . ...

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• Wonders of the December Sky | Astronotes
• NGC4666: Secrets of a Starburst Galaxy | Astronotes
• Stellar Nursery NGC 6357: Image of the Month | Astronotes

... 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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• Interstellar Clouds Conference Homepage
• Observational data and reduction

... 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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• Best Celestial Events of 2006 ? Amateur Astronomers Association of New York
• Deep Sky Images by Joe DiNapoli ? Amateur Astronomers Association of New York
• Astro-Imaging ? Page 6 ? Amateur Astronomers Association of New York

GALAXIES cenA .tiff 40 Bright Radio Galaxy M31.tiff Nikon Andromeda Galaxy (note HII regions in spiral arms) ngc6744.tiff 40 NGC 6744 a face-on spiral clouds_20d.tiff H'blad The Magellanic Clouds our nearest neighbours Lmc_7.tiff Nikon The Large Magellanic Clouds Lmc_zoom.tiff Nikon Detail of previous image smc_7.tiff Nikon The Small Magellanic Clouds smc-zoom.tiff Nikon Detail of previous image 30dor_40_BVR.tiff 40 The 30 Dor ... B [OIII] Halpha trifid.tiff 40" The Trifid Nebula. ...

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• http://www.mso.anu.edu.au/seminars/abstracts/20151209-1100.html
• GSAOI Super Star Clusters Science Page
• C/2006 P1 (McNaught)

... Eclipses of the Moon in 2009 : . In 2009 there are four eclipses of the Moon (tree penumbral eclipses on February 9, July 7, and August 5-6 and a partial eclipse on December 31). ... Moon enters penumbra (P 1 ) . ... Moon leaves penumbra (P 4 ) . ... Eclipse, lunar : . ... It may be total (the Moon passing completely through the Earth's umbra ), partial (the Moon passing partially through the Earth's umbra at maximum eclipse), or penumbral (the Moon passing only through the Earth's penumbra ). ...

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• Celestial calendar - Solar Eclipses

Photon Scattering: Basic Principle of Photon Scattering . Audio Narration is available . No Scattering: Photon Source and Detector . ... For optical photons, scattering goes as wavelength to the -4 power. In the case of blue photons compared to red photons, this means that blue photons are about 10 times more likely to get scattered than red photons. ... Watch the blue photons scatter away from the detector . ... Interstellar dust make stars appear redder than they really are . ...

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• Low Surface Brightness Galaxy Gallery
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• Astro-2 and the UIT Experiment

Partial Solar Eclipse of 2000 December 25 The eclipse visible in Central America, North America, the nothern Atlan- tic Ocean, and the northern Pacific Ocean. ... o ' Eclipse begins | ... 116 22.4 W Greatest eclipse 0.723| ... 74 03.2 W Eclipse ends | ... 0.91792 |+ ... 0.91793 |+ ... 0.91794 |+ ... 0.91795 |+ ... 0.39669 |+ ... 0.91796 |+ ... 0.39667 |+ ... 0.02665 | ...

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• http://www.ipa.nw.ru/PAGE/EDITION/ENG/AE/e0011230lua.txt
• AEarchiv (eclipses, transits)

... Subject and Problems of Stellar Astronomy. ... Plane of Galaxy, Methods of Its Location Determination. ... Stars Distances. ... Other Methods of Stars Distances Determination. ... Tangential Velocities, Their Determination by Self-Motions. ... Determination of Solar Apex and Spatial Velocity by Radial and Spatial Velocities of Stars. ... Features of Orientation and Parameters of Peculiar Stellar Velocities Ellipsoid. ... General and Selective Light Absorption in Galaxy. ... Darc Clouds in Galaxy. ...

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• Extragalactic Astronomy

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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