... April 10, 1999 . Canaries Sky . ... Explanation: This gorgeous view of stars, nebulae, and the Milky Way comes from the dark night sky above the lovely island of La Palma in the Canaries archipelago . ... Orion's famous red giant star Betelgeuse , near picture center, has a yellowish cast and Rigel is the bright star in Orion at lower right. Brilliant white Sirius , near the bottom, is the brightest star in the picture (and in Earth's night sky). ... About APOD > . ...

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• APOD: 2007 April 29 - NGC 6302: Big, Bright, Bug Nebula
• APOD: 2006 April 6 - Unusual Bright Soil on Mars
• APOD: 2008 April 17 - Messier 63: The Sunflower Galaxy

... Armagh Planetarium . ... Universe . ... Posted on April 19, 2012 | ... Continue Reading.. ... 2 Comments In the upcoming weeks you will be hearing in the news the words тАЬDragon SpacecraftтАЭ, so Sinead McNicholl has the full story on what exactly this new vehicle is and [ ] . ... Posted on March 29, 2012 | 3 Comments The month of April is fantastic month for stargazing and for astronomy in general with numerous dates to mark in your calendar. €аFrom Earth Day celebrated on 22 April, in [ ] . ...

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• constellations | Astronotes - Part 3
• constellations | Astronotes - Part 5

... Comet Ikeya Zhang Meets The ISS . ... Still catching the Sun's rays, the International Space Station (ISS) cruises across the early evening sky above Tomahawk, Wisconsin, USA. Recorded on April 9 around 9 pm CDT in a 30 second exposure, the sunlit space station traced this bright streak moving east (right) through the constellation Cassiopeia. ... The Trifid Nebula from AAO . ... Also known as M20, this photogenic nebula is visible with good binoculars towards the constellation of Sagittarius. ...

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• Bright Cliffs Across Saturns Moon Dione

... 2000 April 24 . Reflection Nebula M78 . ... Explanation: An eerie blue glow and ominous columns of dark dust highlight M78, a bright reflection nebula in the constellation of Orion . The dust not only absorbs light, but also reflects the light of several bright blue stars that formed recently in the nebula. ... M78 belongs to the larger Orion Molecular Cloud Complex that contains the Great Nebula in Orion and the Horsehead Nebula . ... About APOD | ...

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• APOD: April 30, 1999 - Solar Shock Wave
• APOD: April 2, 1999 - Stars of NGC 206

STScI . STScI Hosts "Habitable Worlds Across Time and Space" Symposium April 28-May 1 . ... What is STScI . ... Spring Symposium Poster . ... During the four-day symposium "Habitable Worlds Across Time and Space," scientists from diverse fields will gather at the Space Telescope Science Institute in Baltimore, Maryland, on April 28 through May 1, to discuss the formation and long-term evolution of terrestrial bodies throughout the various phases of stellar and Galactic evolution. ...

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• GRB 000301C
• GRB 990123Page
• Space to Dream - Racine Journal Times, 27 April 2004

... Its perihelion would occur on April 1, 1997, at which point the comet would be only 0.92 astronomical units from the Sun, just within the orbit of Earth. ... Taken in April 1993, the photo showed the comet over 13 astronomical units from the Sun, well beyond the orbit of Saturn. ... Hale, as in Comet Hale-Bopp, has written a book, Everybody's Comet (available through the ASP Catalog) and coordinated an Internet project, "Hale-Bopp: Live in the American Classroom." ... Anatomy of a comet. ...

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• ASP: Contents, March/April 2004
• ASP: The Nearest Stars: A Guided Tour
• ASP: Contents, March/April 2000

... 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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• Education Discussion Forum - Hosted by The Astronomy Net
• Moon, Planets And Aurora, Oh My! - an Astronomy Net Article
• Articles written by astronomers for astronomers of all ages.

... From Terry Moseley: "A very bright fireball was seen widely over Ireland, and even as far away as Liverpool, at about 00.30 on Sunday morning, 4 April. John McConnell saw it from Maghaberry, Co Antrim, and a woman saw it from her home in Newry, Co Down. The Liverpool observer reports that the fireball appeared at 30 - 40 degrees altitude in the western sky at 00:33 UT on 2009 April 05. ... I saw it) early Sunday morning at 00:32 BST. ... International Year of Astronomy, Ireland National Node . ...

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• Armagh Observatory
• Knockmany Chambered Cairn
• Latest News

... Stars are born in big clouds of gas and dust in the Universe. ... This amazing new picture shows a small part of a cloud in our own galaxy (called the Milky Way) in which stars are being formed. In the picture you can see bright arc shapes in the cloud, but what created them is a mystery. ... When all of their fuel is gone, these massive stars explode in what is called a supernova explosion the biggest firework display in the Universe! ...

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• http://www.eso.org/public/news/eso1412/kids/
• http://www.eso.org/public/news/eso1218/kids/
• Panning across the bright star cluster Messier 7 | ESO

HIPASS Name RA, DEC(J2000) l, b NED ID peak rms mom0 vsys w50 w20 vLG MHI Ref. ... Col(1,2) = HIPASS name (HIPASS Jhhmm-dd; A,B,C if needed) . Col(3,4) = HIPASS center position in RA, DEC (J2000) . ... NGC6822 0.490 Mpc (Mateo 1998) . DDO210 0.880 Mpc (Mateo 1998) . NGC0055 1.480 Mpc (Mateo 1998) . ... ESO594-G004 1.060 Mpc (Mateo 1998) . IC5152 1.590 Mpc (Mateo 1998) . WLM 0.925 Mpc (Mateo 1998) . NGC3109 1.250 Mpc (Mateo 1998) . SextansA 1.440 Mpc (Mateo 1998) . ...

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• ATNF Daily Astronomy Picture
• Pulsar Group Main/Visitors
• Surface brightness measurements of extended galactic nebulae

... A comparison of the computed and experimental relations F max ( H), as well as comparison of drift scans of point sources across different horizontal cross-sections of the BP with the corresponding computed cross-sections were made. ... The drift scans of the point source 3С84 (H=87 o ) at the wavelength 7.6 cm across the horizontal cross-sections of the BP (black lines) and the computed horizontal cross-sections of the BP corresponding to them (red lines). ...

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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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• Bright galaxies | Astronomy.com
• Hubble observes a dwarf galaxy with a bright nebula | Astronomy.com
• The Sky This Week: April 1 - 10 | Astronomy.com

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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• U of O High Energy Physics Seminars

... The bright supernova (hereafter SN) in the galaxy NGC 4527 was first sighted by S. Knight (USA) on April 13.17UT at magnitude ~14.0v. The report of the sighting was subsequently forwarded by phone to the AAVSO. ... SN 1991T. The galaxy NGC 4527 is an Sb(s)II type galaxy with an apparent Blue magnitude of 11.32 (Shapley-Ames, 1981). ... An analysis of this event utilizing visual observations by amateurs, plus a light curve is presented.. ... THE LIGHT CURVE: . ... ISN SN 1991T web page . ...

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• Bright Supernova Bright Supernova
• Bright Supernova - Archives
• ASRAS HOME

Jasper at home in April. Jasper in his crib. He'll outgrow it soon. Jasper moving across the floor. He still doesn't sleep very well. We are all tired. Ellen Howell <ehowell@naic.edu> Last modified: Tue Aug 12 2003

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• The Pleiades
• Star Names
• Arecibo Observatory observations of 2005 YU55

. Search this album . Gallery . :: The First 100 Years . :: Siding Spring Observatory - General Views . :: SSO, April 1964 . Sidebar Left . Sidebar Top . No Sidebar . Sidebar Bottom . Sidebar Right . View full size . Title: SSO, April 1964 . File name: SSOapr646.jpg . Dimensions: 1050 x 646 px . Page: 1 2 9 10 11 12 13 14 15 16 17 18 19 122 123 . Powered by Gallery 3.0.9 (Chartres) . Login

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• SSO, April 1984
• Gemini NIFS April 2002 Update.

. April 7, 1998 . Fig. 1. An example of the EUV and soft X-ray large-scale chain of bright point revealed by the modified SOHO/EIT and Yohkoh/SXT images. A coinciding almost straight-line chain of the bright points extends between very distant points 1 and 2 on the SOHO/EIT (a) and Yohkoh/SXT (b) images of April 7, 1998. Back to the page of the SOHO/EIT and Yohkoh/SXT chains . Back to the parent page . Last update: 9 August 1998 .

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• http://www.izmiran.rssi.ru/~ichertok/CHAINS/ANNOUNC/sohyoh.htm
• http://www.izmiran.rssi.ru/~ichertok/CHAINS/ANNOUNC/radio.htm
• The April 12, 2001 event

... Home Observing This Month?s Sky This Monthт??s Sky т?? April 2016 . ... Lecture Series 2014-2015 . ... This Monthт??s Sky т?? ... This Month's Sky - 2015 . This Month's Sky - January 2015 . ... April 2015 . ... 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 . ... 2016 Amateur Astronomers Association of New York Designed by Press Customizr Powered by . ...

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• Amateur Astronomers Association of New York ? Amateur Astronomers Association
• Solar Bridge Across New York Harbor ? Amateur Astronomers Association of New
• This MonthтАЩs Sky тАУ February 2016 ? Amateur Astronomers Association of New

Chandra X-Ray Observatory CXC 1. ... E0102: Joint Fits with ACIS S3, MOS1/2 & pn Paul Plucinsky, Joseph DePasquale, & Steve Snowden Paul Plucinsky 1 EPIC Cal April 2007 Chandra X-Ray Observatory 1. ... E0102: Gratuitous Pretty Pictures of E0102 S3 Summed Data ~100 ks CXC RGS Spectrum (Pollock 2006) Objective: develop a spectral model which can be used by RGS, HETG, EPIC & ACIS, etc. ...

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• http://xmm.vilspa.esa.es/docs/documents/CAL-SRN-0242-1-0.ps.gz
• http://xmm.vilspa.esa.es/calibration/documentation/epic_cal_meetings/201504/Smith2_Cal_2015.pdf
• http://xmm.vilspa.esa.es/docs/documents/CAL-SRN-0070-1-0.ps.gz

On April 14, 2000 UT a series of Shack-Hartmann measurements were made at varying altitudes. ... The tilts and sags shown are those given by the normal Shack-Hartmann analysis. ... Without this feedback, off-telescope tests showed positioning errors on the order of 10 arcseconds in the secondary mirror position. ... Tilt M2 Bk by X" . ... The coefficients m1 through m3 need to be added to those that are currently in the TCC to correct for the secondary translation with respect to the primary. ...

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• spectro1
• ARC Progress Reports