... Mars to Appear Normal this 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. On October 30, Mars will be nearly opposite to the Sun, rise at sunset, set at sunrise, and appear highest and brightest around midnight. ...

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• XWare > APOD
• Астронет > Mars to Appear Normal this August

... August 20, 1996 . A Close-Up of the Lagoon Nebula . ... Explanation: Ribbons of red-glowing gas and dark dust surround massive young stars in this close-up of the Lagoon Nebula taken by the Hubble Space Telescope . The Lagoon Nebula is relatively close and bright - it appears larger than the Full Moon and is visible even without a telescope . ... The unusual bright central part of the Lagoon Nebula (lower left in this image) is known as the Hourglass Nebula. ... About APOD | ...

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• APOD: 2005 August 8 - Mars to Appear Normal this August
• APOD: 2013 August 26 - Bright Planetary Nebula NGC 7027 from Hubble
• APOD: 2013 August 23 - A Spectrum of Nova Delphini

... 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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... 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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... 2000 August 30 . The Brown Dwarfs of Orion's Trapezium . ... NICMOS IDT , NASA . ... Explanation: The bright stars above are well known as heart of the Trapezium , an open cluster of stars in the center of the Orion Nebula . ... Although many more brown dwarfs than hot stars have now been found in Orion, their very low masses make them inadequate to compose much of the dark matter expected in galaxies and the Universe . ... About APOD | ... NASA Technical Rep.: ...

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• APOD: August 6, 1998 - Infrared Horsehead
• APOD: August 28, 1998 - Hydrogen Trifid
• APOD: 2000 August 4 - M15: Dense Globular Star Cluster

... 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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• Radar Images of asteroid 1998 ML14
• First Galfa H I Map
• Asteroid 1998 ML14 1998 Aug 14-17

... Virginia Kilborn's program gfinder was run on 388 luthered and edge-masked HIPASS cubes , covering the whole southern sky, over all 1024 channels (i.e. -1281 to 12741 km/s), with an HI peak flux cutoff of 60 mJy/beam. ... The large number of candidates is mostly due to artifacts generated in areas of strong continuum flux, mostly the Galactic Plane, (causing a baseline ripple), the HI emission in our Galaxy, and lots of interference (1408 MHz birdie, GPS etc.) ... Number of galaxies: . ... galaxies ...

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• Near-infrared millihertz variability of the wisps and jet in the crab pulsar
• Pulsar Group Main/Visitors

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . See also images taken on November 22nd . Image taken by Andy McCrea who says, . To me the comet appears yellowish and it has gone from star-like to a . ... More images from Andy McCrea here . ... The true explanation is that a very faint comet, known as periodic comet Holmes, produced a massive outburst of material and became a million times brighter than it was just a day earlier. ... More images from Andy McCrea . ...

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• Solar Eclipse 2008 August 1st
• Mystery Flare | International Year of Astronomy in Ireland | Astronomy 2009
• Terry Mosely's Bulletins

Weekly Bulletin on Solar and Geomagnetic Activity Highlights on 20 - 26.08.2012, Forecast on 27.08 - 03.09.2012, Carrington Rotation 2127 (15,04.08.2012) SUNSPOT ACTIVITY OF THE SUN REMAINED AT THE AVERAGE LEVEL. ... ON THE VISIBLE SOLAR DISK CONSTANTLY THERE WERE 4-5 SUNSPOT GROUPS ONE OF WHICH, APPEARING ON THE VISIBLE SOLAR DISK ON AUGUST 25, AVERAGE SIZES. NEXT WEEK THE LEVEL OF SUNSPOT ACTIVITY IS EXPECTED TO BE AVERAGE. ... FLARE ACTIVITY WAS ON THE LOW LEVEL IN ALL DAYS. ...

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• http://www.izmiran.rssi.ru/services/saf/archive/en/2015/obzor20150810.en.txt
• http://www.izmiran.rssi.ru/~ichertok/CHAINS/ANNOUNC/980803.htm
• http://www.izmiran.rssi.ru/services/saf/archive/en/2012/obzor20120910.en.txt

... Solar System . ... Milky Way . Stars . ... Blue-white Vega is of course one of the brightest stars in our night sky lying about 25 light years from us in Lyra. ... Also in Lyra is the double star Beta Lyrae (Sheliak). This is in fact a close eclipsing pair of B-class stars about 960 light years from the Sun and was only the second eclipsing binary system to be discovered after Algol. ... Planet of Beta Lyrae (from The New Challenge of the Stars by Patrick Moore & David Hardy 1977) . ...

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• Leonid meteors 2011 | Astronotes
• September 2012 Night Sky Wonders | Astronotes
• The August Night Sky | Astronotes

Making HST Pictures: Examples and Illustrations . ... These illustrations represent some of the steps and techniques used to produce “pretty pictures” from HST images. ... TIFFs (ftp) . ... Separate images are exposed through different color filters. ... An alternate way to make color images . ... Eight bit (one byte) images contain 256 different values that may be represented by 256 shades of gray or 256 arbitrary colors from a color map (or palette) of all possible colors. ...

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• Bright Object Artifacts
• WFPC2 Instrument Handbook Update
• HST this week: 222

Photon Scattering: Basic Principle of Photon Scattering . Audio Narration is available . No Scattering: Photon Source and Detector . ... For optical photons, scattering goes as wavelength to the -4 power. In the case of blue photons compared to red photons, this means that blue photons are about 10 times more likely to get scattered than red photons. ... Watch the blue photons scatter away from the detector . ... Interstellar dust make stars appear redder than they really are . ...

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• Low Surface Brightness Galaxy Gallery
• The Galaxy Gallery: Messier Objects
• Orbital Properties of the Solar System

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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• GSAOI CoDR Pictures Page
• publications

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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... 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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• Galaxy sector, archive 2004
• Total Solar Eclipse of 2008 August 1
• Optical component of GRB080319B

... Circumstellar disc of beta Pictoris: constraints on grain properties from polarization. To appear in the Astronomy & Astrophysics . abs , src , ps ] . ... Dust influx to Titan from Hyperion . ... abs ] . ... Characteristics of bulges and disks in interacting galaxies . ... Dust grains around Herbig Ae/Be stars: porous, cometary-like grains? ... To appear in the Astronomy & Astrophysics Supplement . ... Finally, Links may lead you to more options (e.g. via the LANL preprint system). ...

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• Kholtygin et al., Magn. Field Conf., August 2003 (2004)

11 august 2014/Monday: Arriving, Registration . ... The variation of solar flare coronal X-ray source spatial properties. ... Melnikov V.F., Charikov Yu.E., Kudriavtsev I.V. Directivity of X-ray and gamma-ray emission from different parts of flaring magnetic loops. ... E., Melnikov V.F. Angular characteristics of polarization degree of hard X-ray emission from different parts of flaring magnetic loops. ... The thick target model and analytical calculations of the hard X-ray emission from solar flares. ...

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We cannot observe the way the distant universe accelerates cosmic rays or produces energetic photons, but acceleration processes also occur on our Sun , though on a much more moderate scale. ... That is why such events are often missed by cosmic ray detectors near the equator, where the lowest energies are excluded by the Earth's magnetic field. The best detectors for observing solar particles are therefore those sensitive to the lowest energies of the cosmic radiation. ...

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• Uranus' Moon Umbriel
• The Sun's Corona
• First X-Rays From a Comet Discovered

... The blue bubble is a planetary nebula known as Abell 33. Planetary nebulae are created when an aging star blows away its outer layers of gas in a gigantic cosmic bubble. ... Creating the illusion of the cosmic diamond is a bright star along the rim of the nebula. ... The star is about 700 light years away, that is halfway between Earth and the nebula. ... At the centre of the ring, you can see the remains of the star that created this planetary nebula, now a white dwarf . ...

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• Los Cielos de Am , The darkest sky and the two galactic hemispheres
• The Flames of Betelgeuse | ESO
• VISTA Reveals the Secret of the Unicorn | ESO

Microsymposium 38, MS083, 2003 (A4 format) MERCURY: LOCAL VARIATIONS OF THE PHOTOMETRIC RELIEF. ... Because of trajectory and pointing angle constraints the planet could be observed from Mariner 10 only over a small range of phase angles between about 75o and 110o. Therefore the photometric investigations are restricted to measuring the distribution of brightness on the Mercurian disk. ... Raw versions of real-time processing pictures FDS 0000984 and FDS 0000986 were used (images 196 and 202). ...

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• http://selena.sai.msu.ru/Shev/Publications/m44_75_shevchenko_etal.pdf
• Бережной А.А.