Astronotes Armagh Planetarium's Stellar Blog! ... Space Flight . ... Earth Satellites . ... Leonid meteors seen from 13 km altitude aboard an aircraft during the 1999 Leonids Multi-Instrument Aircraft Campaign (Leonid-MAC). Comet Tempel-Tuttle provides the cometary debris for the Leonid meteor shower. ... Every 17-19 November Earth crosses Tempel-TuttleтАЩs orbit and the Leonids become visible. With clear, dark skies observers may see 10 to 15 Leonid meteors every hour on those mornings. ...

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• comets | Astronotes - Part 3
• The Leonid meteors: highlights of the November night sky | Astronotes
• observing | Astronotes - Part 8

... 16.11.2003 . ... Leo , the famous sky constellation visible on the left of the above all-sky photograph , appears to be the source of all the meteors seen in 1998's Leonids Meteor Shower . That Leonids point back to Leo is not a surprise - it is the reason that this November meteor shower is called the Leonids. ... November . ... Publications with keywords: Leonids - meteor shower . Publications with words: Leonids - meteor shower . ... A Leonid Meteor Explodes . A Sirius Leonid Meteor . ...

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• A 2001 Leonids Meteor Shower Fireball
• The Leonid Meteor Shower

... 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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... December 8, 1998 . Leonids from Leo . ... Explanation: Is Leo leaking? Leo , the famous sky constellation visible on the left of the above all-sky photograph , appears to be the source of all the meteors seen in this year's Leonids Meteor Shower . ... Sand-sized debris expelled from Comet Tempel-Tuttle follows a well-defined orbit about our Sun, and the part of the orbit that approaches Earth is superposed in front of the constellation Leo. ... About APOD > . ...

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• APOD: 2003 November 16 - Leonids from Leo
• APOD: 2001 November 4 - Leonids from Leo
• APOD: 2002 November 17 - Leonids from Leo

Armagh Observatory, 13 November 2001: . The Leonid meteors, or shooting stars, are produced by debris from comet Tempel-Tuttle . ... Leonid Dust Trails . This year, however, according to calculations by Armagh Observatory astronomer Dr David Asher , the Leonid meteor shower will be exceptional in having several storm-level peaks on Sunday, 18th November superposed on the normal background level of activity. ... Leonid Dust Trail Theories (PDF Format) by David Asher . ...

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• Leonid Meteor Shower 2004 Armagh Observatory
• Armagh Observatory
• Latest News

... It's a Meteor Shower Smaller than grains of sand, meteors vaporize in a bright streak of light as they hit Earth's atmosphere. Meteor showers come from comets, but the sporadic meteors on other nights are mostly asteroid bits. ... Meteor Showers Come From Comets Jupiter Earth Sun Comet Mercury Tips: A bright Moon can wash out meteors, making them hard to see. ... But the comet bits hit Earth's atmosphere so fast, the pieces vaporize in bright streaks -- making a meteor shower! ...

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• ASP: Monster Comet Promises Big Show
• ASP: Guest Observer
• ASP: Contents, November/December 2001

New England observer Lew Gramer, fresh back from his mid-November fish observing and meteor-catching expedition in South Florida, reports that December also promises to be a great month for celestial sky-sparks!" ... Other showers adding to the mix this month include several very minor showers, such as the Chi Orionids (3 Dec), Monocerotids (9 Dec) and Sigma Hydrids (12 Dec), which usually contribute no more than 2 or 3 meteors per hour during even post-midnight observing this month. ...

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• Amateur Telescope Makers of Boston

... You are here: start €Ё lbaops €Ё pmcal €Ё recentchanges . ... VLBI Schedule . ... Observer's Wiki . ... lbaops:pmcal:recentchanges . ... January 12, 2011, at 05:50 PM by ~cehotan : [==] . ... December 01, 2010, at 01:37 PM by ~cehotan : [==] . ... November 24, 2010, at 05:53 PM by ~cehotan : [==] . ... July 15, 2010, at 12:53 PM by ~cehotan : [==] . ... December 02, 2009, at 07:23 PM by ~cehotan : [==] . ... lbaops/pmcal/recentchanges.txt €§ Last modified: 2015/12/18 16:39 (external edit) . ...

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• Pulsar group | Main / Visitors
• lbaops:lba2013 [ATNF VLBI Wiki]
• lbaops:lba2008 [ATNF VLBI Wiki]

On September 15, 1998, the STScI director, Dr. Steven Beckwith, announced a special observation opportunity to the astronomical community during the Leonid Meteor Shower. During the peak of the Leonid meteor shower on November 17, 1998, HST will be pointed near the anti-radiant for ten hours. Anyone who is interested can submit ideas to STScI for scientific observations during this time. ... There are no HST observations in the archives for objects in this field. ...

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• Is the Crab Pulsar Showing A 60-second Periodic Modulation?
• HST previous weeks

... The TRACE images may be used without restrictions in publications of any kind. ... These two images, taken on 18 November 2000 at 15:54UT and 16:11UT, respectively, show such an event: the red circle in the image to the left shows a region where many loops are cooling, with bright loop tops (the intensity scales with the square root of the image to reduce the dynamic range). ... See also a collection of images related to the Sun, other cool stars, and solar-terrestrial effects . ... Images | ...

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• APOD: August 17, 1999 - A Crescent Sunrise
• APOD: November 19, 1999 - Mercury And The Sun
• Thought-Provoking Imagery Shows Sun's Place in the Galaxy

... Observing . ... Leonid meteor shower peaks mid-November . During November, the Leonid meteor shower will produce up to 15 meteors per hour. ... Although the Full Moon that occurs on the same day as the Leonids peak November 17 will diminish the view, 15 meteors per hour still will radiate from the constellation Leo the Lion. ... Annually, the Leonid meteor shower deposits 12 13 tons of material across the planet. ... Only registered members of Astronomy.com are allowed to comment on this article. ...

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• Two meteor showers put on shows this December | Astronomy.com
• The Leonid meteor shower fast approaches | Astronomy.com
• A gem of a meteor shower | Astronomy.com

... Bad Astronomy . ... Bitesize Astronomy . ... Last week's Snack talked about how black holes can affect the environment around them in such a way as to be very bright . ... It's a common misconception that black holes always have matter swirling into them. ... As this matter gets closer and closer to the black hole it piles up and a large, fairly flat disk forms. This is called the accretion disk , because matter from this disk accretes (that is, falls in) on the black hole. ... 2008 Phil Plait. ...

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• Phil Plait's Bad Astronomy: Misconceptions
• Phil Plait's Bad Astronomy: What's New

... 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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• Rhiannon Zoe Nolan Howell November 2002
• Magellanic Stream
• p1693 total power dropouts

... 2 April 1999 . The Nobeyama Radioheliograph data show that in the microwave range, besides large-scale trans-equatorial chains (see, e.g., the May 11-15, 1993 and November 1-4, 1993 events), there are also many examples displaying large and strongly evolving "longitudinal" or "internal" chains connecting remote active regions inside an active zone in one (northern or southern) hemisphere (the August 20-September 3, 1998 event). ... Last update: 2 April 1999 . ...

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• Large_Scale Emitting Chains
• Oct-Nov 2003

... Main . ... April 2016 . ... December 2015 . November 2015 . October 2015 . September 2015 . August 2015 . July 2015 . June 2015 . May 2015 . April 2015 . March 2015 . February 2015 . January 2015 . December 2014 . November 2014 . October 2014 . September 2014 . August 2014 . July 2014 . June 2014 . May 2014 . April 2014 . March 2014 . ... December 2013 . ... April 2013 . ... December 2012 . ... April 2012 . ...

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... About meteorites . ... Meteorite Dronino . ... New iron meteorite shower found! Meteorite Encyclopedia . ... About laboratory . ... Dronino iron meteorite . ... Mr. Gus'kov felt that further efforts by Milanovsky were likely to be unsuccessful, so he searched further and found our Meteorites Laboratory. The Laboratory's analysis showed that the Dronino Iron has a meteorite origin. ... Dronino is the 111th meteorite and only the third iron-meteorite shower found in Russia in the last 250 years. ...

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... Circumstellar disc of beta Pictoris: constraints on grain properties from polarization. To appear in the Astronomy & Astrophysics . abs , src , ps ] . ... Dust influx to Titan from Hyperion . ... abs ] . ... Characteristics of bulges and disks in interacting galaxies . ... Dust grains around Herbig Ae/Be stars: porous, cometary-like grains? ... To appear in the Astronomy & Astrophysics Supplement . ... Finally, Links may lead you to more options (e.g. via the LANL preprint system). ...

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• Conference Proceedings | Radiation mechanisms of astrophysical objects:
• Slide shows and posters | Radiation mechanisms of astrophysical objects:

Title: A New Model of the Gravitational Lens 0957+561 and a Limit on the Hubble Constant . Authors: Norman A. Grogin , Ramesh Narayan (Harvard Univ.) ... Title: ROSAT/PSPC observation of the distant cluster CL0939+472 . ... Title: Interaction in the Bimodal Galaxy Cluster A3528 . ... Title: Cosmological Implications of Galaxy Cluster Evolution . ... Title: Galaxy Cluster Virial Masses and Omega . ... Matches 201 to 222 from a total of 222 matches for the search pattern galaxy cluster . ...

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• astro-ph authors/title/abstract search for 'galaxy environment' all years

These links highlight 2008 - current ARC projects for telescopes, instruments, or operations at Apache Point. ... Eyepiece: April 10, 2009 . Painted Enclosure: April 23, 2009, Part A , Part B . Drive Maintenance: July 24, 2009, Part A , Part B , Part C , Part D , Part E , Part F , Part G . ... New Interior Photos: March 14, 2014 . TripleSpec Electronics Mount: March 05, 2008: Part A , Part B , Part C . ... TripleSpec: October 30, 2008 . ... GFP Upgrade: December 8, 2010 . ...

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• Figure 1
• Figure 6
• Figure 4

... Laboratory for Spectroscopy of Molecular Structures . ... News . ... A new article entitled Description of optical properties of cholesteric photonic liquid crystals based on Maxwell equations and Kramers-Kronig relations has appeared in Physical Review E. Congratulations to Grigoriy Ksyonz on his first publication! . 25 th February 2013 . ... 22 nd November 2012 . ... 22 nd February 2012 . 4 th Workshop on Liquid Crystals for Photonics 2012 will take place in Hong Kong December 9-11, 2012. ...

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• The XI Asian-Pacific Astronomy Olympiad: 2nd announcement
• The 2 nd Asian-Pacific Astronomy Olympiad
• International Astronomy Olympiad 2010, resolutions