M1 image More About M1 Nice Color Picture . ... M16 image More About M16 HST image . ... M31 image More About M31 Nice Color Picture . ... M42 image ; M43 image More About M42/43 Nice Color CCD Picture . M51 image More About M51 Color Image of M51 M51 Supernova . M57 image More About M57 Nice Color CCD Picture Very Deep M57 Image . ... M81 image More About M81 M81 Supernova Ultraviolet Image of M81 More about Ultraviolet Imaging . M82 image More About M82 M82 False Color M82 True Color . ...

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... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Risks Comparable to NEOs . ... The Increasing Rate of Discovery of Asteroids . ... Comet and Asteroid Collision Probabilities . ... Extreme albedo comets and the impact hazard (PDF Format) . ... Asteroid Impact Animations . ... Workshop on Scientific Requirements for Mitigation of Hazardous Comets and Asteroids - 2002 . ... The Spaceguard Survey Report, 1992 (PDF) . Tsunami from Asteroid/Comet Impacts . ...

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... September 28, 1999 . Mystery Object Explained . ... The so-called mystery object appeared star-like but displayed colors unlike most stars or quasars . Further investigation has now revealed the object to be a Broad Absorption Line (BAL) quasar , a relatively rare type of active center of a distant galaxy. Different atoms and molecules in the absorbing gas surrounding the BAL quasar 's center probably cause the unusual colors. ... About APOD > . ...

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• APOD: 2000 January 17 - V4641 Sgr: The Closest Black Hole Candidate
• APOD: 2007 May 23 - Venus Near the Moon
• APOD: 2001 November 12 - Is Mystery Object an Orphan Afterglow

... But this remarkable interplanetary perspective from March 13, finds the comet posing with our fair planet itself - as seen from the STEREO Behind spacecraft. ... At the left an enormous coronal mass ejection (CME) is erupting from a solar active region. Of course, CME, comet, and planet Earth are all at different distances from the spacecraft. The comet is closest.) ... Publications with keywords: comet - coronal mass ejection . Publications with words: comet - coronal mass ejection . ...

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• Journal "Peremennye Zvezdy"
• Астронет > V4641 Sgr: The Closest Black Hole Candidate
• V4641 Sgr: The Closest Black Hole Candidate

... 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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• Phil Plait's Bad Astronomy: Info
• Phil Plait's Bad Astronomy: Bitesize Tour of the Solar System

... Near Infrared Camera and Multi-Object Spectrometer Instrument Handbook for Cycle 17 > Chapter 4: Imaging > 4.6 Photon and Cosmic Ray Persistence . ... HgCdTe detector arrays like those in NICMOS are subject to image persistence. ... Experiments using Cycle 7 NICMOS data have shown that it is possible to scale and subtract such ?post-SAA darks? from subsequent science exposures taken later in the same orbit, and thus to remove a significant fraction of the CR persistence signal. ...

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• Bright Object Artifacts
• FOS Webpage
• The Hubble Deep Field - Hot Pixel Removal

... For the past years I have been working on the problem of synthesis of light curves of close binary systems, consisting of a normal star and a compact object (point object with fixed X-ray luminosity). ... Possible existence of a bright spot on the disk's lateral surface is taken into account. ... The last of then will be published in Gordon and Breach Publishers ( Cherepashchuk A.M., Katysheva N.A., Khruzina T.S., Shugarov S.Yu. ... Cherepashchuk A.M., Katysheva N.A., Khruzina T.S., Shugarov S.Yu. ...

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• Eugene Trunkovsky

Astronotes Armagh Planetarium's Stellar Blog! ... Armagh Planetarium . ... Our Galaxy . ... Stars . ... Space Flight . ... This activity is believed to be promoting the unusually high rate of star formation seen in M82. ... Radio image of M82 made with the MERLIN and VLA telescopes. Insets show MERLIN images from April 25th and May 3rd 2009 demonstrating the sudden appearance of the mystery object.€а All images are at a frequency of 5 GHz. ... Mystery object in Starburst Galaxy M82 . ...

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• Kepler 36b and c: Too Close for Comfort | Astronotes
• Aldebaran: Red Giant at the Eye of the Bull | Astronotes
• Our Galaxy | Astronotes - Part 2

... The removal of the bright sky background from your IR images is one of the key steps in the data reduction process. Once bad pixels have been removed from all the astronomical frames, the object frames must have the matching sky background images subtracted from them. ... The simplest sky subtraction is where you have separate sky and object frames taken a short time apart. ... The resulting sky subtracted images should be examined to make sure that sky subtraction has been properly achieved. ...

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• Closing down
• Magnitudes and Colors
• Stellar objects

. Previous slide . Next slide . Back to first slide . View graphic version .

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• Siding Spring Survey 2003 XB22
• Mass Feeding and Feedback in Young Stellar Objects
• VV29 = Arp 188 = The Chainsaw Galaxy

... Apache HTTP Server Version 2.4 . Apache > HTTP Server > Documentation > Version 2.4 . ... The Shared Object Cache provides a means to share simple data across all a server's workers, regardless of thread and process models . ... Initialize the cache. ... Destroy a given cache instance object. apr_status_t store(ap_socache_instance_t *instance, server_rec *s, const unsigned char *id, unsigned int idlen, apr_time_t expiry, unsigned char *data, unsigned int datalen, apr_pool_t *pool) . ...

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• Asteroid Toutatis
• Objects, Methods, and Properties
• The Motion of Comets

You can also see this page in Russian with using KOI8 (X Windows) or CP1251 (MS Windows) Cyrillic coding. The Laboratory supports the space TV experiments, mainly in the planetary exploration missions. ... Image Co-registration . ... PHOBOS mission - Martian satellites investigations. Phobos on the Martian limb, the image from Phobos-2 probe from 02/28/89. ... Russian Space Bulletin. ... Last modified at June,26 1997 Alexey Kuzmin: akuzmin@mx.iki.rssi.ru . Back to IKI home page ...

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• The Wind Spacecraft
• Kuiper-Oort
• Seeing the Solar System

... self-absorption - the absorption of light shining on an object by a process similar to that which produced the light originally; if a cloud emits less light than it absorbs from other clouds behind it, this net loss of light, termed self-absorption , causes the foreground cloud to appear darker than the background field (the term is from spectroscopy, where small absorption dips sometimes occur in larger emission lines, making the latter look as if it is absorbing part of itself) . ... HISA Main ...

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• Arecibo Radar Discovers Triple Near-Earth Asteroid
• Chapter 11. Specifying OpenGL Environment Variable Settings

... Posts tagged ?Efron? ... The notions of missing data are overall different between two communities. ... Tags: bootstrap , catalog , Efron , estimator , ignorable , imputation , incompleteness , Little , MAR , MCAR , missing data , nonparametric , Rubin , Schafer , survey . ... 2 Comments . ... Astronomers confront with various censored and truncated data. ... Tags: censored , Efron , Feigelson , Freedman , massive data , Nelson , Petrosian , survival analysis , truncated . ... Comment . ...

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• The AstroStat Slog light curve
• The AstroStat Slog GRB
• The AstroStat Slog Schafer

... The remote planet Pluto and its moon Charon orbit the Sun at a mean distance of almost 6,000 million kilometres, or nearly fourty times farther out than the Earth. During a recent investigation by an international group of astronomers [1], the best picture ever of Pluto and Charon [2] was secured with the European Space Agency's Faint Object Camera at the Hubble Space Telescope (HST). ... The new HST image was taken when Charon was near its maximum elongation from Pluto (0.9 arcseconds). ...

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• CCD artifacts
• First Rotation Period of Kuiper Belt Object Measured (ESO PR Photo 41/98)
• Comet Halley

... OM grism data are obtained as image mode data. However the different nature of this type of data, spectra of the objects in the field of view instead of their "sky" image, makes that a special processing must be applied to the grism images. ... They are concatenated in a perl script, omgchain , which works in a similar way to the image and fast mode chains. ... All necessary corrections are applied to the grism data files. ... As we have pointed out OM grism data are image mode data. ...

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• Generation from In-Orbit Data
• Comments
• Description

Classroom Activity: Pinhole Protractor Gene Byrd and Renato Dupke . ... We cannot directly perceive the distances or sizes of far-away objects. Instead, our eyes only detect the angular size of objects. ... In Part II, which will appear in a future issue of The Universe in the Classroom, students will see how astronomers use parallax -- an extension of binocular vision -- to determine the distances of stars in the Sun's neighborhood. ... distance = 57.3 x physical size angular size (in degrees). ...

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• ASP: Beacons in the Gloom
• ASP: The New and Improved Hubble Space Telescope
• ASP: The Comet About to Smash into Jupiter

... Research objects and scientific purposes . Space scientific program includes development and launch of two supersmall spacecrafts "Universitetskiy" and "Kompas-2" intended for monitoring of radiation conditions near the Earth. ... All the studies conducted in the near-Earth space are characterised by strong radiation fields. ... The circular polar orbits, which cover all the near-Earth space, are the most favorable for comprehensive studies of the radiation conditions near the Earth. ...

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... Up: Data Analysis and Processing Techniques . ... Also, a method for quality control of CCD observations is suggested. ... Everyone who observes a celestial object using a CCD detects moving celestial objects as a ``by product''. ... We hope that our investigations may be useful for near-Earth space control and also for searches of the moving celestial objects through analysis of old and new CCD frames obtained at any amateur or professional astronomical observatory. ...

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• Object Detection Using Multi-Resolution Analysis
• Classification of Objects in the Guide Star Catalog
• DASHA-2: Improving Visualization and Processing of Photometric Data with IDL

... A radio galaxy is a galaxy that emits an unusually big amount of energy at radio wavelengths. ... Inside of each galaxy with an active nucleus (radio galaxies are among them) there must be a system of a "central machine" responsible for the colossal amount of the emitted energy from radio to gamma ranges. ... Sometimes a radio source in an active galaxy may flare again if the needed conditions appear (a new portion of matter would fall into the furnace of the "central machine"). ...

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• Detection of Radio Transients and Variable Radio Sources Using the Archive Data
• Metagalaxy sector, archive 2015
• Galaxy sector, archive 2004