Astronomy Picture of the Day . ... EGRET , Compton Observatory , NASA Explanation: What if you could see gamma rays (photons with more than 40 million times the energy of visible light)? ... This startling notion is demonstrated by this image of the Moon from the Energetic Gamma Ray Experiment Telescope (EGRET) onboard NASA's orbiting Compton Gamma Ray Observatory . The most sensitive instrument of its kind, even EGRET can not see the quiet Sun which is faint at extreme gamma-ray energies. ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . On Friday 15th February the recently discovered Apollo-class near-Earth asteroid 2012 DA14 will make a close pass by the Earth. The asteroid will come within about 34,000 km (21,000 miles) of the centre of our planet at 7.26 p.m. That is, within the ring of geostationary communication satellites which orbit at some 35,800 km above the surface of the Earth. ... Last Revised: 2013 February 11th . ...

... February 10, 1997 . The Gamma Ray Moon . ... EGRET , Compton Observatory , NASA . ... This startling notion is demonstrated by this image of the Moon from the Energetic Gamma Ray Experiment Telescope (EGRET) onboard NASA's orbiting Compton Gamma Ray Observatory . The most sensitive instrument of its kind, even EGRET can not see the quiet Sun which is faint at extreme gamma-ray energies. Why is the Moon so bright in gamma rays? ... About APOD > . ...

... 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. ...

... Current APO Weather . ... Search Site . ... Information for New Users . ... Technical Staff pages . Night Logs and Mailing Lists (maintained by APO) . ... Technical Documents and Database Search . ... Observer's Documentation and Procedures . ... Problem Reporting and APO Technical Documents Database Search . ... APO Drawing/Document Management Procedures . ... APO Technical Documents Database Search . Home Astrophysical Research Consortium . ... Mail Lists (maintained by APO) . ...

. " The Arecibo Observatory is sponsored by the National Science Foundation. Any opinions, findings and conclusions or recommendations . expressed in this publication are those of the author(s) and do not necessarily reflect the views of the National Science Foundation."

Astronotes Armagh Planetarium's Stellar Blog! ... Space Flight . ... Earth Satellites . ... Leonid meteors seen from 13 km altitude aboard an aircraft during the 1999 Leonids Multi-Instrument Aircraft Campaign (Leonid-MAC). Comet Tempel-Tuttle provides the cometary debris for the Leonid meteor shower. ... Every 17-19 November Earth crosses Tempel-TuttleтАЩs orbit and the Leonids become visible. With clear, dark skies observers may see 10 to 15 Leonid meteors every hour on those mornings. ...

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. ...

... About ATNF overview . ... Both are consistent with earlier estimates, computed for the population of optically selected galaxies. This consistency occurs because, although the distribution of optical central surface brightnesses among galaxies is flat, we fail to find a population of galaxies with central surface brightnesses fainter than 24б  B - , even though there is no observational selection against them. Keywords: Galaxies: Luminosity Function, Mass Function; Surveys . ...

. Pulkovo Observatory of Russian Academy of Sciences is situated . near Saint-Petersburg. It was founded in 1839. 196140, Saint-Petersburg, Pulkovskoye chaussee 65/1 . English version . Russian version . This page has been accessed times since May 1, 1999.

Dr. Victoria I. Prokhorenko . ... Situation Analysis of The "PROGNOZ" Orbit for Solar- Terrestrial Space Experiments. ... Studies of Satellite Situations Mission. ... A Situation Analysis of the Orbits of the Tail and Auroral Probes in the "INTERBALL" Project. ... Specific Tasks of Multiple Scale Plasma Measurement in Regatta- Cluster System (co-authors S. Savin and L. Zelenyi)- In Book: Proceedings of an International Workshop on Space Plasma Physics Investigations by Cluster and Regatta. ...

... E-mail: calvi@stsci.edu . ... March-April 2015: ``The Data Scientist Toolbox'' and ``R Programming'' online classes by Johns Hopkins University (JHU). November 2014: PhD in Astronomy, Padova University, Italy. ... Italy. ... September 2013-November 2014: STScI . ... 2009-2012: Classes on "Nebulae Spectroscopy" and "Galaxies in the Universe" during the educational project for high schools "Il cielo come laboratorio" organized by the Department of Physics and Astronomy of Padova University (Italy). ...

... Telescopes . ... The International Conference "Dark Ages and White Nights (Spectroscopy of the CMB)" (June 20-24, 2016) . ... The International Conference "Stars: from collapse to collapse" (October 3-7, 2016) . The traditional annual competition conference of scientific and scientific-engineering papers of the Observatory staff members . ... A session of the Dissertation Council (October 16, 2015) . ... International scientific conference "Large Optical Telescopes" (October, 10-13, 2011) . ...

home publications > mercury . SEARCH ASP SITE: Match ALL words Match ANY word . ... ASP Conference Series . Monograph Publications . IAU Publications . ... Publications of the ASP (PASP) . ... Mercury Magazine . ... Astronomy Beat . ... Mercury Magazine Contents . ... January/February 1999 . ... More than Just a Planet, It's a Meal , Eric Sandquist . ... Life On The Mountain: An Astronomical Family Scrapbook of Mount Wilson Observatory, Don Nicholson and Scott W. Teare . ... publications . ...

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