... 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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• How do light pollution filters work? Do they actually help? | Astronomy.com
• Observing Basics: Visual Solar Filters | Astronomy.com
• Filtered solar views | Astronomy.com

... Contact . ... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . Development of the 20 March 2015 partial solar eclipse as seen from Northern Ireland from first contact at 08:26 to eclipse maximum at around 09:30. ... Armagh Observatory reports that the largest partial solar eclipse visible from Northern Ireland since 1927, when 97 percent of the SunтАЩs disc was obscured, occurs between 08:26 and 10:38 on the morning of Friday 20 March 2015. ...

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• Solar Eclipse Observed Armagh Observatory
• Solar Eclipse 2008 August 1st
• ASTRONOMICAL PHENOMENA FROM MARS

adapted from Observe: Eclipses, published in 1979 by the Astronomical League and "Safe Solar Filters," by B. Ralph Chou, Sky and Telescope, August 1981) . ... Tape TWO pieces of film together into a sandwich, and tape this over the opening in the cardboard. ... The cardboard frame will act as a shade from the bright Sun, while you safely observe through the film sandwich. ... Undeveloped film is not safe. ... tape . ... At the end of one of the tubes, tape the aluminum foil, and make a tiny pinhole. ...

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• ASP: Guest Observer
• ASP: The Upcoming Total Solar Eclipse!
• ASP: Up, Up, and Away

... 21.11.2003 . ... Credit: Markus Strassfeld Explanation: November's lunar eclipse was one of the shortest in recent years and also one of the brightest -- demonstrating that the Earth's shadow is not completely dark. The eclipsed Moon remained easily visible during totality, reflecting reddened light filtering on to its surface from all the sunsets and sunrises , as seen from the lunar perspective , around the edges of a silhouetted Earth. ... Publications with keywords: total lunar eclipse . ...

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• Астронет > Sunset Moonlight
• Journal "Peremennye Zvezdy"
• XWare > APOD

Discussions about the observing strategy for the HDF-S focussed primarily on the questions: . What filters/gratings to use for each instrument ? What exposure time to use for each filter/grating ? ... Different areas of the Version 1 output image correspond to variable amounts of exposure time, due to the relatively large pointing shifts necessitated by the multi-instrument observing strategy. ... WFPC-2 Filters, exposure times and limiting AB magnitudes for Version 1 images . Filter . ...

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• Wood's Filters
• Observing with Linear Ramp Filters
• Observing Bright Targets

... NICS will be the only infrared instrument for the first light of the TNG; as a consequence, we decided to incorporate a sufficient degree of operation flexibility by providing the instrument with six different observing modes, three aimed at imaging and three at spectroscopy: . ... It will be possible to use the narrow band filters as order sorters; this will allow to perform high resolution long-slit spectroscopy in the wavelength ranges covered by the available narrow band filters. ...

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• Educator's Guide to Eclipses
• Optical System
• LonGSp: Available Filters

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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• The high quality H interference filter
• UBV Photometry of the Massive Eclipsing Binary TT Aur
• Technical aspects of the new AAO/UKST H interference filter

... This year's eclipse is unique in duration. ... Although, at the present time, there are 6 solar observatories belonging to leading space agencies in orbit around the Earth, the eclipse of 22 July, 2009, will only be seen by two of them: the Russian CORONAS-PHOTON satellite equipped with TESIS telescopes and Japan's HINODE satellite fitted with an XRT space telescope. ... TESIS will be the first of the two devices (and the very first on Earth) to witness the solar eclipse. ...

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... Solar Eclipses in 2009 : . There are two eclipses of the Sun (an annular eclipse on January 26 and a total eclipse on July 21-22 ) in 2009. ... Annular Solar Eclipse . ... Annular Eclipse of the Sun on January 26, 2009 . ... Beginning of northern limit of umbra . ... Beginning of center line; central eclipse begins . ... Central eclipse at local apparent noon . ... Total solar eclipse . ... An annular eclipse occurs when the apparent disk of the Moon is smaller than that of the Sun. ... Umbra: . ...

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... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2003 November 21 . Sunset Moonlight . ... Hoping to view the celestial shadow play from the Earth's night side near Cologne, Germany, about 400,000 kilometers from the lunar surface, amateur astronomer Markus Strassfeld packed a digital camera and telescope and drove about 10 kilometers outside the city to escape the bright city lights . ...

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• APOD: 2010 January 22 - Millennium Annular Solar Eclipse
• Light Curve Templete/Observing Form For Visual SNe Observers.
• APOD: 2012 May 19 - Annular Solar Eclipse

NMW survey overview . Access image archive . ... The New Milky Way survey aims to detect bright (V<13.5) optical transients near the Galactic plane using an automated wide-field (8x6 deg.) system capable of surveying the whole Milky Way area visible from the observing site in one night. ... All images obtained during the transient search survey are available online (please use the image archive access form ). ... Images per field: . ... Images per night: . ... Milky Way imaging time: . ...

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... 11 Yellow-Green (78% transmission): Contrasts well with the red and blue characteristics of surface features on Jupiter and Saturn. ... 82A Light Blue (73% transmission): Useful on the Moon, Mars, Jupiter, and Saturn, this subtle pale blue filter enhances areas of low contrast while avoiding significant reduction of overall image brightness. ... Meade Series 4000 Photo-Visual Color Filters may be ordered individually or in the following sets: . ... Meade Series 4000 Broadband Nebular Filters . ...

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• Meade Series 4000 Broadband Nebular Filters
• Meade Series 4000 Moon Filter: ND96
• Coronado SolarMax II 60mm Solar Filter set with RichView tuning and 30mm

This page shows which observing modes are available with which correlator and gives a brief description of the observing modes.. available; . ... WAPP . ... ALFA . ... Calibration mode that scans 4 times across the calibrator, forming a spider shape. ... Calibration mode that scans twice across the calibrator, forming a cross shape. ... This is the standard spectral-line single-pixel observing mode. ... A Calibration mode used by the Galactic ALFA surveys to calibration the G-ALFA HI Spectrometer. ...

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• hardware_pdev
• Arecibo Observatory L-Wide Band Receiver
• M42 Color Images

... 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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• Solar eclipse 2015
• Total solar eclipse broadcast from Kenya with GLORIA
• Total Solar Eclipse of 2008 August 1

Sloan Digital Sky Survey Telescope Technical Note 19910801 . ... It has long been apparent that an all-sky picture of clouds over an observatory site and available in near real-time would be a great benefit to personnel using a telescope. ... We have anecdotal evidence from J.T. Williams of MMTO and David Westfall, formerly of CFHT and now of New Mexico Institute of Mining, that video-rate 10 micron cameras are very effective at imaging clouds. ... The focal length of the mirror is 25 mm. ...

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• Astrophysical Research Consortium - Apache Point Observatory
• UW-WSU Nebular Emission-Line Filters
• Astrophysical Research Consortium Small Aperture Telescope

... Exposure Time Calculator (ETC) . Survey processing . ... VISTA is a 4-m class wide field survey telescope for the southern hemisphere, equipped with a near infrared camera (1.65 degree diameter field of view at VISTA's nominal pixel size) containing 67 million pixels of mean size 0.34 arcsec and available broad band filters at Z,Y,J,H,K s and a narrow band filter at 1.18 micron. A wide field visible camera, if constructed, could also be used on VISTA. ... Tile . ... ESO VISTA Public Surveys . ...

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• VISTA ETC - Exposure Time Calculator
• Observing with VISTA

... Science User Portal . ... ESO, the European Southern Observatory . ... Weekend Visits to the ALMA OSF . ... Survey Telescopes . ... Star Clusters . ... Stars@ESO . ... ESO Science Newsletter . ... ESO 3.6-metre telescope . ... MPG/ESO 2.2-metre telescope . ... ESO 1-metre Schmidt telescope . ... This view shows a new picture of the dust ring around the bright star Fomalhaut from the Atacama Large Millimeter/submillimeter Array (ALMA). ... Note that ALMA has so far only observed a part of the ring. ...

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• ALMA observes a ring around the bright star Fomalhaut | ESO Ireland
• ALMA observes a ring around the bright star Fomalhaut | ESO United States
• ALMA observes a ring around the bright star Fomalhaut | ESO Australia

Next: Reducing the observations Up: PEPSYS general photometry Previous: Influencing the plan . ... If the telescope and instrumentation are unfamiliar to you, you may have trouble keeping to the schedule for the first night or two, so try to work with a previous observer on the equipment for a night or two of training before your observing run. If you fall behind, try to keep as many low-altitude observations of extinction stars as you can, and drop some circumzenithal ones if necessary. ...

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• Filters - Apache HTTP Server
• Columns REDLEAK, RLTYPE, and MAKER
• Optical spectroscopy

MAIN PAGE . ... Nova Cygni August 1975! ... 1975/76: Comet West! ... Dr. Richard West (4th from left) & AAL members visiting SES Betzdorf on occasion of our club's 25th anniversary - October 1996 . Comet West Information . ... It was the brightest comet visible from Earth since Comet West in 1976. ... 1997: Comet Hale-Bopp! ... Thus Comet Hale-Bopp never got closer to Earth than Earth gets to the Sun. ... Comet Hale-Bopp JPL Page . ... 1999: Total solar eclipse over Luxembourg! ...

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... Observing . ... Home Observing Poe Park, The Bronx ? Solar Observing . ... Poe Park, Bronx, Solar Observing . ... Observing Out-Of-Town . ... Beyond New York City . ... Observing Resources for Amateur Astronomers - Part 1: Beginning Observers . Observing Resources for Amateur Astronomers - Part 2: Intermediate Observers . ... A History of the First Forty Years of the Amateur Astronomers Association . ... 2016 Amateur Astronomers Association of New York Designed by Press Customizr Powered by . ...

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• Central Park ? Solar Observing ? Amateur Astronomers Association of New York
• Urban Lunar Eclipses ? Amateur Astronomers Association of New York
• High Line ? Solar Observing ? Amateur Astronomers Association of New York