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
• Leonid Press Release

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
• The Mock Spectrometer
• Comets National Astronomy and Ionosphere Center (Arecibo Observatory)

... 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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• The Unexpected Past of a Dwarf Galaxy | ESO
• ESO - Director's Discretionary Time Proposals
• The Glory of a Nearby Star | ESO

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
• The AstroStat Slog measure

... 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 the PDS into the FITS file produced by powspec , and plots it with the PGPLOT library. ... The PDS is calculated in data segments of Nbins bins. ... 1 : PDS is normalized such that the (white) noise level expected corresponds to a power value of 2. ... 2 : as =2, but the expected white noise level is subtracted. ...

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• XMM-Newton SAS: Watchout Page
• Radiation Hardness

Magnetic Stars, 2011, pp. ... 2010). ... 463 Figure 2: Difference between individual and average spectra in Fig. 1 with phase (vertically, on the right) Figure 3: Almost in a year repeatability of spectral lines form (2009.07.05 and 2010.05.31) in an identical phase 464 CHOUNTONOV 4000 3000 Magnetic field, Bz(G) 2000 1000 0 -1000 -2000 2008/05/23 2010/05/31 -3000 0.0 0.2 0.4 0.6 0.8 1.0 phase Figure 4: Longitudinal magnetic field variations with phase (the sine curve, Rivinius et al., ...

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• A unique isolated dwarf spheroidal galaxy KKR25
• Northern Lights and GLORIA

... Главная . ... Новости . ... Проекты . Любителям астрономии . Проект ISON . ... Подробнее . ... Категория: Новости проекта ISON . ... Метки: Космический мусор ,љ Астероиды ,љ Гамма-всплески ,љ Любителям астрономии ,љ Кометы љ . ... Метки: Космический мусор ,љ Астероиды ,љ Любителям астрономии љ . ... Новости обсерваторий проекта] - Обсерватория Кубанского государственного университета от Иванов А - 09.04.2016 11:08:49 . ... 1999-2013 Copyright "Астрономия и Телескопостроение" . ...

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... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Globular cluster NGC 2808, elliptical galaxy NGC 2986, and the Sextans Dwarf . ... Unexpected gamma-ray emission from dwarf galaxy may point to new understanding of dark matter . ... That s why dwarf galaxies are important in the hunt for the dark matter particle. Dwarfs are thought to lack other gamma-ray-producing sources, so a gamma-ray flux from a dwarf galaxy would make a very strong case for dark matter. ...

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• Observations of optical flares challenge theories on magnetars | Astronomy.com
• A much expected journey: How Pluto became a giant among the dwarfs |
• First galaxies were born much earlier than expected | Astronomy.com

Next: The Model Up: No Title Previous: Radiopulsars as Sources of . In this section, we study the evolution of stellar populations on a time-scale of 10 Myr for a starburst љ occurring under conditions similar to those in the Galactic Center (see Lipunov et al. (1995d)[ 126 ]). We estimate the expected number of X-ray transient љ sources (NS + MS star), super accreting BH, and BH + supergiant binaries, all as functions of time elapsed after the burst. ...

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• Supernova Explosions
• The ``Reflection'' Effect
• Normal star evolution

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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• Energetic Particles
• Explorers 1 and 3
• Electromagnetic Waves

... Planets . ... Earth Satellites . ... The newly discovered ?mega-Earth? ... Its sibling, the lava world Kepler-10b, is in the background (the two planets? proximity is grossly exaggerated) .€а Kepler-10c has a diameter of about 29 000 km, 2.3 times as large as Earth, and weighs 17 times as much. ... The first mega-earth to be discovered is Kepler-10c which orbits a star lying about 560 light years from the Sun in the constellation Draco. ... Astronomers Find a New Type of Planet: The ?Mega-Earth? ...

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• Wow Signal: SETI Search for Extraterrestrial Intelligence | Astronotes
• Exoplanet HAT-P-1b: weird, warm and fuzzy | Astronotes
• Asteroids collide: nobody notices until a year later! | Astronotes

... Bad Astronomy . ... Mad Science . ... Site Info . ... Public Talks . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... Who is this guy who calls himself "The Bad Astronomer?" ... First, yes, I am a real live astronomer (when people ask me what astronomers do, I tell them "They astronom !" ... These are emitted by powerful objects like black holes, exploding stars, and super-dense neutrons stars. ... Finally, am I really a bad astronomer? ... 2008 Phil Plait. ...

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• Phil Plait's Bad Astronomy: Misconceptions: The Planet X Arguments in a...

... Using a simple 2-D Gaussian Point Spread Function (PSF) on a constant (flat) sky background, I derive a theoretical photometric and astrometric performance model for analytical and digital PSF-fitting stellar photometry. ... The photometric performance is maximized when either the effective background area or the effective-background-level measurement error is minimized. ... An important, but frequently ignored, noise source is the uncertainty of the measurement of the effective background level ( )...

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• ADASS 2003 Conference Proceedings
• The New MAJORDOME: Efficient Scheduling of Autonomous Telescopes
• Asteroseismology-Observing for a SONG