Hubble Observations Shed New Light on Jupiter Collision . Was it a comet or an asteroid? ... Their initial findings, combined with results from other space-borne and ground-based telescopes, shed new light on Jupiter's atmospheric winds, its immense magnetic field, the mysterious dark debris from the impacts, and the composition of the doomed comet itself. ... Hubble's ultraviolet observations show the motion of very fine impact debris particles now suspended high in Jupiter's atmosphere. ...

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... Spiral Galaxy NGC 300 . 21.08.2002 . NGC 300 is so interesting because it is so normal. ... The site is one of the premier observing locations on Earth. Earths North Magnetic Pole . ... A magnetic compass does not point toward the true North Pole of the Earth. Rather, it more closely points toward the North Magnetic Pole of the Earth. ... Asteroid 2002 NY40 will fly by planet Earth early in the morning August 18 Universal Time (late in the evening August 17 Eastern Daylight Time). ...

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... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. April 11, 1996 . Unexpected X-rays from Comet Hyakutake . Credit: C. Lisse, M. Mumma (NASA/GSFC), K. Dennerl, J. Schmidt, and J. Englhauser (MPE) . Explanation: The first X-rays ever detected from a comet were discovered from Comet Hyakutake with the ROSAT satellite on March 27th. ... About APOD | ... A service of: LHEA at NASA / GSFC . ...

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• APOD: 2011 May 23 - An Unexpected Flare from the Crab Nebula
• APOD: 2001 November 28 - Extra Solar Planetary Atmosphere Detected
• APOD: 2002 August 20 - The Universe in Hot Gas

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... September Perseid meteors captured by the . ... Its occurrence provides astronomers with interesting new data about the hidden trails of meteoroids тАФ small bodies ranging in size from fine dust particles to objects of marble-size and larger тАФ in the solar system and their supposed sources: comets and asteroids passing through the inner solar system. ... The particular comet that created the September Perseids is unknown...

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• Terry Mosely's Bulletins
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NATIONAL ASTRONOMY AND IONOSPHERE CENTER . ... Astronomy . ... Visitor Center . ... Kick-Off Ceremony of the Arecibo Observatory 50th Anniversary . ... Astronomers using the worldБЂ™s largest radio telescope, at Arecibo, Puerto Rico, have discovered flaring radio emission from an ultra-cool star, not much warmer than the planet Jupiter, shattering the previous record for the lowest stellar temperature at which radio waves were detected. ...

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• astronomers detect coolest star
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... All the images except two are in the Si-5 filter, which has a central wavelength of 11.68 microns and a width of 1.01 microns. This filter shows only dust emission, and excludes the emission lines that PNs have in the 10 micron region of the spectrum. ... The emission from NGC 6210 in the 11.7 micron filter is even fainter than that for PN G058.3-10.9, barely within the sensitivity limit of the Gemini telescope. ... The Si-5 filter image looks completely different than the N-band image. ...

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• HST this week: 246
• Supersonic Motions in the Upper Atmosphere of Jupiter Detected at Ly- with GHRS
• The Dust-to-Gas Ratio in the Small Magellanic Cloud Tail

What will happen when the fragments hit Jupiter? ... All the fragments will enter Jupiter's atmosphere at an angle of 42 degrees from the vertical and impact near a latitude of 44 degrees south, but on the back side of the planet as seen from Earth (about 10 degrees in longitude behind the edge of Jupiter, as seen from Earth). ... Any body moving through an atmosphere is slowed by atmospheric drag, by having to push the molecules of that atmosphere out of the way. ...

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• ASP: Mercury Summer 2011

... User Guide ] Task: early Purpose: Flag data which has early/normal problems. Categories: calibration, uv analysis EARLY is a Miriad task which flags visibility data that it suspects contains early/normal problems. ... If the scatter exceeds some number of sigmas, then the data are assumed to be affected by the early/normal problem, and the entire record is flagged. ... If the signal is noise dominated, no early/normal problems can be detected, and the data will not be flagged. ...

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• uvamp
• offaxis
• No Title

... Science . ... Science Users Information > Data Handling and Products > Data Reduction FAQ > I see unexpected boxy emission-like features in my REDL spectra - where do they come from? ... Observing with ESO Telescopes . ... ESO-MIDAS . ... ESO Data . ... The pipeline by default interpolates across the bad columns in the REDL CCD when it creates the master bias, but does not so when it processes the science data. This inconsistency can create boxy emission-like features as seen in the figure below. ...

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Determination of short-term proper motions of fast stars with Pulkovo Normal Astrograph. ... Khovritchev Laboratory of Astrometry and Stellar Astronomy of the Pulkovo Observatory, RAS, Saint-Petersburg Observations Normal Astrograph (D/F=33 cm/3.5m), CCD camera: S2C, FOV = 18x16 arcmin, Pixel size 900x900 mas Determination of the new proper motions of 413 LSPM stars 1 epoch : CCD-surveys and catalogs -- M2000, CMC14, 2MASS, SDSS DR7 2 epoch : CCD-observations with the ...

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• http://www.puldb.ru/nikolaev_2011/PUB_NIKOLAEV_2011/plates2.pdf
• Pulkovo Databases

... Archives . ... Such eminent astronomer said already least absolute deviation over chi-square , if I match simple mean residual and mean square residual to relevant methodologies, in order. ... Anyway, if one is sure that the data/parameters of interest are sampled from normal distribution, Eddington?s statement is better to be reverted because of sufficiency . ... Instead of sample standard deviation, use absolute mean deviation (simple mean residual, Eddington?s words) to quantify uncertainty. ...

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• The AstroStat Slog Blog Archive my first AAS. VI. Normalization
• dictionary
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... The parameters of powspec are computed from the parameters of efftplot , such that for each energy band, only one time-averaged PDS is computed. Then for each energy band, efftplot reads