The night sky brightness, together with number of clear nights, seeing, transparency, photometric stability and humidity, are some of the most important parameters that qualify a site for front-line ground--based astronomy. ... Night sky at ESO-Paranal (Chile). ... Night sky brightness data . ... UBVRI night sky brightness at ESO-Paranal during sunspot maximum (A 2003, PDF) . ... The Dancing Sky: six years of night sky observations at Cerro Paranal (Starlight 2007 conference proceedings, PDF) . ...

... Credit: Joe Orman Explanation: Rising before the Sun on February 2nd, astro photographer Joe Orman anticipated this apparition of the bright morning star Venus near a lovely crescent Moon above a neighbor's house in suburban Phoenix, Arizona, USA. Fortunately, the alignment of bright planets and the Moon is one of the most inspiring sights in the night sky and one that is often easy to enjoy and share without any special equipment. ... NASA Official: Jay Norris. ... Bright Planets, Crescent Moon . ...

Discover the cosmos! ... September 2, 1996 . Sirius: The Brightest Star in the Night . ... As Sirius is 8.7 light years distant, it is not the closest star system -- the Alpha Centauri system holds this distinction. ... In 1862, Sirius was discovered to be a binary star system with a companion star, Sirius B , 10,000 times dimmer than the bright primary, Sirius A. Sirius B was the first white dwarf star discovered, a type of star first understood by Subrahmanyan Chandrasekhar in 1930. ...

... Armagh Observatory, 24th March 2009: The International Space Station ( ISS ) has recently become the second brightest object in the night sky тАФ even brighter than the planet Venus, and second only to the Moon. Evenings will provide the chance of a spectacular view, if the sky is clear, as for the next few days the orbit of the ISS around the Earth repeatedly takes it over Ireland. ... At its best, it is now the second brightest object in the night sky. ...

Astronotes Armagh Planetarium's Stellar Blog! ... Meteors and Meteorites . ... Stars . ... Monthly Sky Notes . ... This famous depiction of the Leonids was based on a first hand account of a meteor storm by a minister, Joseph Harvey Waggoner. ... In the autumn the Great Square of Pegasus is visible in the southern night sky. ... I hope this guide to the November night sky is helpful and have fun star sight-seeing! ... Tweets that mention The Leonid meteors: highlights of the November night sky | ...

Next: Discussion Up: Other Stars Previous: Stars with Less . While periods were detected on 59 of 105 stars monitored only 12, ten in Orion OB1a and OB1b plus TAP 26 and P1724, had detections with FAP's below 1%. This seems consistent with results from the Van Vleck Observatory. ... The Van Vleck Observatory has reported periods for 75 stars (Choi & Herbst 1996) and variability has been seen in 186 stars (Attridge & Herbst 1992) over four years. ... Thu Dec 5 13:29:36 EST 1996 ...

Once students get the hang of it, they can find and measure the brightness of Delta Cephei in a few minutes. ... of Delta Cephei . ... Oct. ... The following table lists the measurements of Delta Cephei made by one amateur astronomer in autumn 1990. ... 4.0 . ... This activity is a simplified version of one that appeared in Hands-On Astrophysics, a series of activities prepared by the American Association of Variable Star Observers with support from the National Science Foundation. << previous page | ...

... Tonight's Sky . ... SUN MOON MERCURY VENUS MARS, JUPITER SATURN . ... Observing . ... Astronomy for Kids . ... Get to Know the Night Sky . ... Sky-event alert: Venus, brightest light in the night sky . All month, Earth's sister world appears high and bright in the night sky after sunset for easy viewing. ... January's celestial night-light is Venus. ... More resources from Astronomy.com: . ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...

Little Rock -written by Tom Douglas I know I've disappeared a time or two Along the way I lost me and you I needed a new town for my new start I'm sellin' VCRs in Arkansas at a Walmart I haven't had a drink in 19 days My eyes are clear and bright without that haze I like the preacher from the Church of Christ I'm sorry that I cried when I talked to you last night CHORUS I think I'm on a roll Here in Little Rock ...

... Siding Spring Observatory by night - Bob ShobтАж . Bob Shobbrook dressed for a winters night atтАж . ... Title: Bob Shobbrook dressed for a winters night at the control computer for the photometer on the ANU 24-inch telescope. ... No use may be made of any of the images without Dr Shobbrook's written permission. ... Bob Shobbrook dressed for a winters night at the control computer for the photometer on the ANU 24-inch telescope. ...

... SCIENCE AND BUSINESS . Such a trifle as a starry night sky of largest observatories turned out to be a small change coin in commercial bargains for exclusive communal services in Russia, and for a few elite flats in penthouses in Ukraine. SCIENCE AND BUREAUCRATISM . ... Till in Russian) . ... Clericalization of science and education (Till in Russian). ... Researcher of the Sternberg Astronomical Institute, The Moscow University. ... SAI home page . ... October, 2008) . ... November, 2007) . ...

... 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) ...

... Bad Astronomy . ... Bitesize Astronomy . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... Last week, our tour outwards made a stop at our own home planet. Permit me to hold our tour a bit longer, to linger and gaze upon the Moon. ... Complex molecules floated in the water, but the concentration of these compounds wasn't high enough for them to get any further along than making amino acids and the like. ... 2008 Phil Plait. ... Subscribe to the Bad Astronomy Newsletter! ...

... It is a simple 1 X finder scope that mounts to almost any telescope. ... It projects three red circles into space, allowing you to center the scope on bright stars or planets. ... In many cases it is the only finder scope you'll need. (in bright city skies, it will be more difficult to use). Place the Telrad circles between the bright stars shown around the Messier object you wish to view, and with you widest field eyepiece (usually the lowest power) you should find the Messier Object very easily. ...

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. ...

Measurement of Sky Brightness at the Iranian National Observatory Davoud Afshari1 and Sadollah Nasiri1,2 1Physics Department, Zanjan University, Zanjan 45195-313, Iran; Institute for Advanced studies in Basic Science (IASBS), Zanjan 45195-1159, Iran; Measurement of light pollution 2 Introduction Among 34 candidate sites at the central part of the country, 5 sites namely Garkesh (in Kashan ), Kolahbarfi(in Kashan ), Deynava (in ... One of these is light pollution. ...

mom0 mom1 mom2 w50 w20 -------------------------------------------------------------------------------- ADD 216 07:31:39 -69:02:28 new -tidal_clo 0.114 11.7 1489.5 40.8 69.3 261.8 HIP 522 12:27:37 +01:34:14 HGcloud 0.491 29.7 1286.6 16.7 60.4 87.2 ZSS 102 16:18:46 -55:37:33 new -J1616-55e 0.124 3.7 399.5 7.0 30.5 43.3 HIP 827 17:11:57 -64:41:19 new -(VK- cloud 0.187 5.3 454.8 7.0 30.8 52.2 EXA 39 17:22:00 -59:45:00 new -(BK- ...

... November 12, 1996 . Comet Hale-Bopp Passes M14 . ... Explanation : Comet Hale-Bopp continues its slow trek across the night sky, and can now be seen superposed near the bright globular cluster M14 . Will Comet Hale-Bopp become as bright in early 1997 as Comet Hyakutake did in early 1996? It is still too early to tell. ... Because of the size of coma , some speculate that the nucleus of Hale-Bopp is unusually large. ... Tomorrow's picture: Seven Jets from Comet Hale-Bopp . ... About APOD . ...

The Astronomy Shop . ... Home | ... Software | Starry Night Enthusiast - Astronomy Software . ... Brilliantly realistic, but designed for anyone with an interest in the night sky, Starry Night Enthusiast lets novice space explorers instantly launch themselves into the fascinating world of astronomy right from their desktops, with or without a telescope. ... See the comparison sheet on all three levels of Starry Night astronomy programs at . ... www.astronomy.net . About Astronomy Net | ...

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. ...