... A Farewell to Tails . ... Credit: W. Pacholka Explanation: As 1997 fades, so does the Great Comet of 1997: Comet Hale-Bopp . Discovered even before the Great Comet of 1996 , Comet Hale-Bopp became the brightest comet since 1976 . Many will remember Comet Hale-Bopp as a comet with a coma so bright it could be seen by eye even when near the Moon . ... Publications with keywords: Comet Hale-Bopp . Publications with words: Comet Hale-Bopp . ... The Dust and Ion Tales of Comet Hale-Bopp . ...

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• Астронет > A Farewell to Tails
• Bright Planetary Nebula NGC 7027 from Hubble
• Mars to Appear Normal this August

... 2005 August 8 . Mars to Appear Normal This August . ... Regardless of numerous urban legends circulating, Mars will appear relatively normal in August. October is the best month to see Mars this year. ... As Earth catches up to Mars in their respective orbits around the Sun, Mars will keep rising earlier in the night. On 2005 October 30, Earth will have caught up to Mars and the planets will be the nearest to each other in their orbits -- this time around. ... About APOD | ...

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• APOD: August 2, 1995 - Jupiter's Rings
• APOD: December 15, 1997 - A Farewell to Tails
• APOD: 2002 March 26 - Comet Ikeya-Zhang over Tenerife

... 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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M1 image More About M1 Nice Color Picture . ... M16 image More About M16 HST image . ... M31 image More About M31 Nice Color Picture . ... M42 image ; M43 image More About M42/43 Nice Color CCD Picture . M51 image More About M51 Color Image of M51 M51 Supernova . M57 image More About M57 Nice Color CCD Picture Very Deep M57 Image . ... M81 image More About M81 M81 Supernova Ultraviolet Image of M81 More about Ultraviolet Imaging . M82 image More About M82 M82 False Color M82 True Color . ...

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• Low Surface Brightness Galaxy Gallery
• Galaxy Gallery Page III

A team of U.S. and German astrophysicists have made the first ever detection of X-rays coming from a comet. ... Following the initial detection, the team reported repeated X-ray emissions from the comet over the next 24 hours. ... One preliminary theory is that X-ray emission from the Sun was absorbed by a cloud of gaseous water molecules surrounding the nucleus of the comet, and then were re-emitted by the molecules in a process physicists call "fluorescence." ... Comets . ...

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• Uranus' Moon Umbriel

Supernova 2009js in NGC 918 . This page is devoted to information on Supernova 2009js in NGC 918 . Basic information on this SN, including the last reported brightness, on this Supernova can be found on the main page . Information on the original web pages for many of these images can be found on the updates and links web pages. Discovered independently by Lick Observatory Supernova Search (USA) and Koichi Itagaki (Japan). ... 2009/10/11.44 . 17.2 . ... Joseph Brimacombe . ...

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• Supernovae 2010jl in UGC 5189A
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• Supernova 2000cl in NGC 3318

Next: BASIC PROPERTIES Up: R CORONAE BOREALIS STARS Previous: INTRODUCTION . RCB stars are named after a star just visible to the naked eye in the constellation of Corona Borealis. RCrB was discovered by Edward Pigott (1797), an English amateur astronomer, who had been observing a star in the `Northern Crown' for over a decade. ... Since 1795, other RCB stars have been discovered and their properties have been carefully observed. ...

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• Historical Background
• Armagh Observatory
• Amateur Astronomer Becomes Second Ever to Discover Asteroid from Ireland, After

Proposal Identi cation No.: P1015 Date Received: 1997-Feb- 1 00:34:34 Technical Page Proposal Type: Long Term General Category: Pulsars Observation Category: Total Time Requested: 19 Hours Proposal Title: Timing Observations of a New, Bright, Fast Pulsar ABSTRACT: We have discovered a bright 25 ms pulsar, J0407+16, during a drift scan survey at Arecibo Observatory. ... Here we propose further timing observations of this unique pulsar. ... Maybe Part of the observing run. ...

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• Arecibo Radar Discovers Triple Near-Earth Asteroid
• GRB030329

In autumn 1994, two groups of astronomers announced that they had discovered Cepheid variable stars in a distant cluster of galaxies. ... As the term suggests, variable stars change in brightness over time. ... Variable stars are an ideal way to get high-school students doing real science, with real data, from the real sky. ... a sky chart to find the stars . ... Students can use the nearby stars to estimate the magnitude of Delta. ... Locate the star Delta in Cepheus and estimate its brightness . ...

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• ASP: The Universe: Yours to Discover
• ASP: Book Review

Umbriel . Uranus II . ... It is about the same size as Ariel and has about the same density. The surface appears to be old with large craters and does not change much from one location to another. ... Orbital period (days) . ... Visual geometric albedo . ... This image is a polar stereographic projection of the southern hemisphere of Umbriel. ... Dark regions are represented as red and bright regions are represented as blue. The two white regions are bright ejecta from two fresh craters. ...

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• Astronomy Picture of the Day
• APOD: 2001 January 21 - Resolving Mira
• APOD: April 9, 1999 - WR 104: Pinwheel Star

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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• Kepler 36b and c: Too Close for Comfort | Astronotes
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• Comet ISON: will it be Comet of the Century? | Astronotes

Check out the new images (Jan 18-25) and (Jan 26-Feb 05) of the comet by Rob McNaught. ... Every few years a comet becomes bright enough to be easily seen with the naked eye but only every decade or so are these comparable with comets like Halley. ... Before Jan 13, the comet is not visible in the Australian sky after sunset. ... SOHO images . ... On Jan 12 at approximately 09:00 UT (8pm NSW time), comet C/2006 P1 McNaught appears at the 11 o'clock position in the images. ... STEREO images . ...

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• VV29 = Arp 188 = The Chainsaw Galaxy

... The Galactic low-mass X-ray binary GS 2023+338 was discovered during the burst on May 22, 1989 with the Japanise satellite Ginga (aka Galaxy). The flux reached 17 crabs (this unit of flux measurement is an bright X-ray source, Crab Nebula) at 10-35 keV. ... No other radio telescope worldwide carried out multi-frequency measurements. ... Upon 14 days the radio flux fell below the detection level at the RATAN-600 in relation to the decrease of the X-ray flux. ...

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• New LBV Star Discovered in the Galaxy
• SS433
• New LBV Stars in the Andromeda Galaxy

EMBARGOED UNTIL: 9:20 AM CST, January 6, 1999 CONTACT: John Biretta Space Telecsope Science Institute, Baltimore, MD (Phone: (410) 338-4917; Internet: biretta@stsci.edu) HUBBLE DETECTS FASTER-THAN-LIGHT MOTION IN GALAXY M87 Astronomers reported today discovering clouds which appear to move many times faster than the speed of light, shooting out from the region of a black hole at the center of the M87 galaxy. ... It's an illusion created by the finite speed of light and rapid motion," Biretta said. ...

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• WFPC2 Instrument Handbook Update
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.

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• Unexpected Changes of Bright Spots on Ceres Discovered | ESO
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... Submitted by Joseph Kristl on 01/22/2007 11:11:43 . ... 16:54:59 local 1/100 sec, f/5.6, ISO 400, fl = 400 mm . While Venus appeared somewhat brighter, it was much higher and thus in a considerably darker sky (and not through thin clouds). My impression at the time was that the comet was brighter than Venus (using calibrated eyeballs.. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

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... Observing . ... Solar Observing . ... April 3 (SUN) - Solar Observing, Central Park , Manhattan . ... APRIL'S SKY . ... Lecture Series at the American Museum of Natural History The Amateur Astronomers Association is proud to present an astronomy lecture series from October through May each year for our members and the .. ... The?аAmateur Astronomers Association of New York?аwas organized in 1927 to promote the study of Astronomy, emphasizing its cultural and inspirational value. ...

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• Comet Hyakutake: The Great ?Earthgrazing? Comet of 1996 ? Amateur Astronomers

Jean Ballet, CEA/SAp 01 February 2005 Column rejection in the MOS The core of soft sources is removed by the standard emchain. Due to very large fluctuations in count rate from one column to the next at low energy. ... New columns with very bad (too low) energy were discovered in 1E 0102. ... 0831_0125911901, MOS 1, CCD 1, GD 153 (SW mode) Standpixeas alotsrs moved Bad ard l n n y ie The columns running through the source core are rejected by embadpixfind 1.20 in SAS 6.1. ...

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• Comments

Recent Changes - Search : . ... PmWiki . ... Basic Editing . ... PmWiki FAQ . ... pmwiki.org . ... edit SideBar . ... Go to new wiki . History . Print . LBASep2014 / . NB Ceduna appears to have variable gain throughout this experiment. This problems appears to be in the receiver itself but was not discovered until toward the end of the LBA session. ... Edit - History - Print - Recent Changes - Search . ...

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• VLBI Wiki | LBASep2014 / V517aCdLog
• VLBI Wiki | LBASep2014 / V521aCdLog
• VLBI Wiki | LBASep2014 / V252asCdLog

... Tonight's Sky . ... Sky this Month . ... Star Atlas . ... stars . ... The Sky This Week: April 1 - 10 . ... Observing springtime deep-sky objects with a large telescope . ... Why do some stars appear to flash a variety of different colors when you look at them through a telescope? ... So, Earthт??s atmosphere will bend some colors from especially bright stars more so than others, which makes the source look like itт??s flashing colors. Get instant access to subscriber content on Astronomy.com! ...

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• A newly discovered comet glows in the morning sky | Astronomy.com
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• Neptune glows at its brightest | Astronomy.com