Astronomy Picture of the Day . The Flaming Star Nebula from CFHT . ... Rippling dust and gas lanes give the Flaming Star Nebula its name. ... The bright star.. ... Inside the Eagle Nebula . ... A closer look at the Eagle Nebula, however, shows the bright region is actually a window into the center of a larger dark shell of dust. ... The telescope mirror, about the size of the Hubble Space Telescope mirror, is protected by a red covering. ... An Unusually Smooth Surface on Saturns Telesto . ...

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... 2006 September 5 . Bright Cliffs Across Saturn's Moon Dione . Credit: Cassini Imaging Team , SSI , JPL , ESA , NASA . Explanation: What causes the bright streaks on Dione? Recent images of this unusual moon by the robot Cassini spacecraft now orbiting Saturn are helping to crack the mystery. ... The bright ice-cliffs run across some of Dione 's many craters, indicating that the process that created them occurred later than the impacts that created those craters. ... About APOD | ...

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• APOD: 2007 September 10 - Building Galaxies in the Early Universe
• APOD: 2009 September 15 - NGC 6888: The Crescent Nebula
• APOD: 2005 September 3 - Venus Unveiled

... September 5, 1998 . The Pulsar Powered Crab . Credit: J. Hester and P. Scowen ( ASU ), NASA . ... Using a stunning series of visible light images taken with the Hubble Space Telescope (HST) , astronomers have discovered spectacular pulsar powered motions within the Crab nebula. Highlights of this HST Crab "movie" show wisps of material moving away from the pulsar at half the speed of light, a scintillating halo, and an intense knot of emission dancing, sprite-like, above the pulsar's pole. ...

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• APOD: November 12, 1996 - Comet Hale-Bopp Passes M14
• APOD: September 22, 1998 - M61: Virgo Spiral Galaxy
• APOD: September 25, 1997 - T Pyxidis: Recurrent Nova

You Can Make Stellar Images Brighter . Articles | ... A few months ago I wrote an article titled "You Can’t Make Them Brighter". So why am I now writing that you can make them brighter. ... The image of a focused star is actually a small disk called the Airy disk, named after the 19 th century scientist Sir George Airy. ... For a given aperture, a smaller Airy disk means that the light is focused to a smaller disk and is therefore brighter. ... www.astronomy.net . About Astronomy Net | ...

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• Summer Triangle - an Astronomy Net Article
• Magnification (Power) And Using Eyepieces - an Astronomy Net Article

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Armagh Observatory reports that, if skies are clear on the night of 27/28 September, skywatchers will witness a rare total eclipse of the Moon during the early hours of Monday 28th. ... As the eclipse progresses from penumbral to partial phase, and then towards totality, it is interesting to observe how the dark shadow of the Earth slowly encroaches on the Full Moon until the Moon is nearly completely obscured. ...

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... View on Arno from the opposite side of ponte S. Niccolo. b06. ... A view on east of Florence from the climb to piazzale Michelangelo. b10. ... Old city wall going from piazza Poggi to Forte di Belvedere. b20. ... Gate near Forte di Belvedere. b23. ... On costa San Giorgio (going down from Forte di Belvedere to palazzo Pitti). b34. ... Giardino di Boboli, stadium. c02. Palazzo Pitti; view from Giardino di Boboli. c03. ... Giardino di Boboli . ... Palazzo Pitti; view from Giardino di Boboli. c12. ...

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• Tuesday, 14 September. Across the Arno: page 1
• Tuesday, 14 September. Across the Arno: page 11
• Tuesday, 14 September. Across the Arno: page 10

... Armagh Planetarium . ... Universe . ... September . ... Posted on September 27, 2010 | ... This new Hubble Space Telescope image shows that M66 seems to have been through the mangle. ... You can find out in this issue of Astronotes) . ... No Comments Dark matter and its part in the evolution of the Universe is revealed by new data collected by the Hubble Space Telescope. ... Newer Entries . ... Here you will find the latest news and views from the fascinating worlds of astronomy and space...

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• Orion, mighty hunter of the winter sky | Astronotes
• September 2012 Night Sky Wonders | Astronotes
• constellations | Astronotes - Part 6

... 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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• WAPP Dual Board Mode

... Bad Astronomy . ... Bitesize Astronomy . ... If you even glance at the night sky from a dark site, you'll see that stars are not evenly spread out across the heavens. ... When you look up in the sky, it's hard not to see patterns formed by stars. ... We call these patterns of stars ``constellations'', meaning ``groups of stars''. Different people see different shapes, so it's no surprise that different cultures have different names and even boundaries for the constellations. ... 2008 Phil Plait. ...

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• Phil Plait's Bad Astronomy: Misconceptions
• Phil Plait's Bad Astronomy: Bad TV
• Phil Plait's Bad Astronomy: Info

... If you were playing the card game Top Trumps about the different types of stars in the Universe, you would definitely want a Yellow Hyper-Giant star in your hand. Just take a look at the stats for the Yellow Hyper-Giant shown in this photo: It is about 20 times heavier, 1000 times wider and it shines 500,000 times more brightly than the Sun! ... When the star was burning hydrogen fuel in order to shine brightly like our Sun does now it was much smaller in size. ...

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• ESO - ESO-Enews #14: September 2009
• Panning across the bright star cluster Messier 7 | ESO
• The NTT, cover of the Sky & Telescope Magazine in September 1989 | ESO

Images and text 2003 Paul Valleli . While up at Stellafane for pre-convention preparations, I spent some early morning times, experimenting with different videography setups on the 13" F/10 Schupmann at the McGregor Observatory. ... Mars was too bright and would have required neutral density filters. ... Next time, I will try 12mm and 9mm projections. ... I aquired about ten thousand frames by 3AM, at which time a breeze picked up and the seeing went to Hellas! ... 2003 Paul Valleli . ...

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Supernova 2006E in NGC 5338 . This page is devoted to information on Supernova 2006E in NGC 5338 . 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. ... We have a DSS Photometry reference image made by Odd Trondal. ... 2006/01/02.835 . ... Discovery, mirror . ... Joel Nicolas image . ... JM Llapasset image . ...

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• Supernova 2009I in NGC 1080
• Supernova 2006B in UGC 12538
• Supernovae 2010jl in UGC 5189A

... The images that make up this mosaic were sent back from NASA s New Horizons spacecraft from September 5 to 7, 2015. The image is dominated by the informally named icy plain Sputnik Planum, the smooth, bright region across the center. ... The smallest visible features are 0.5 mile (0.8 kilometer) in size, and the mosaic covers a region roughly 1,000 miles (1,600km) wide. The image was taken as New Horizons flew past Pluto on July 14, 2015, from a distance of 50,000 miles (80,000km). ...

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• September provides your first peek at Comet ISON | Astronomy.com
• The "flame" burns bright in new WISE image | Astronomy.com
• This week in pictures: September 22т??28, 2012 | Astronomy.com

Different types of satellite orbits have different uses: while the synchronous orbit is best for communication satellites, Lagrangian point orbits help monitor the solar wind before it reaches Earth. A low altitude polar orbit is widely used for monitoring the Earth because each day, as the Earth rotates below it, the entire surface is covered. ... A different choice was made for MAGSAT, orbited 1979-80 to survey the Earth's own magnetic field near its surface. ...

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• Close-up of the Aurora
• The Acceleration of the Aurora
• The Path of the Sun, the Ecliptic

... The Sun rises higher in summer than in winter. ... Over the course of the year, the angle between the Sun and the zenith (straight up) varies by 47 degrees -- a fourth of the way across the sky. ... A solar incidence angle of 90 degrees means the Sun is on the horizon; an angle of 0 degrees means the Sun is directly overhead; negative angles, which occur only in the tropics, mean that shadows point toward the equator. ... Every day, the stars rise and set along arcs parallel to the celestial equator...

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• ASP: Constellations
• ASP: Star Science in the Autumn Sky
• ASP: Monster Comet Promises Big Show

This is the homepage of Andrew Fruchter, an astronomer on the staff of the Space Telescope Science Institute . ... Here you can look at an HST images of the optical counterparts of gamma-ray bursts and their host galaxies. ... Therefore, substantial information on the fine scale structure of objects can be obtained by offsetting the pointing of the telescope between exposures and then combining these "dithered" exposures into a single image. ...

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• HST this week: 257
• HST this week: 260
• HST this week: 264

... 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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• harak_e
• Laboratory for the Stellar Magnetism Study of SAO of the RAS - Magnetic stars -

Tori & Winds, Leicester 14 September 2004 Disk Winds - tests? ... Tori & Winds, Leicester 14 September 2004 Elvis 2000: pluses, minuses q UV/X-ray connection · FUSE, STIS partial covering, transverse; broader abs = edge-on [Kriss, Kaastra] · location: disk or torus [M.E., Kriss, Kaastra] · WA variability. ... BELR in wind? ... Fabian] Tori & Winds, Leicester 14 September 2004 Black Hole Evolution q Obscured population, vs z. [Simpson] Just a phase black holes go through? q Star formation in disk. ...

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• Eyes on the Sky, Feet on the Ground: Chapter Two
• A matrix of tweets from #AAS223
• A matrix of tweets from #AAS221

Crater Gassendi . ... I made this drawing was made on the 26th of november 2001. If you compare this one with the previous drawing of Gassendi (below) the differences are clear. ... This drawing was made on the 28th of september 2001. After nearly a full month without observations I had a one hour gap between the thicker clouds. ... This drawing was made on the 29th of august 2001. ... This drawing was made on the 27th of august 2001. ... This drawing was made on the 25th of august 2001. ...

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... The most spectacular view however is from space, where large areas of aurora can be observed simultaneously, even the entire polar cap. ... Such pictures often show a continuous ring of aurora around the polar cap (picture above), caused mostly by electrons leaking out along magnetic field lines, from the plasma sheet of the Earth's magnetic tail. ... Field lines from the auroral oval are believed to lead to the plasma sheet. ... A near-Earth circular polar orbit has many uses. ...

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• Polar Orbiting Satellites
• Seasons of the Year
• (S-7a) The Black Hole at the Center of our Galaxy