... 2.06.2001 . In the Summer of 1054 A.D. Chinese astronomers reported that a star in the constellation of Taurus suddenly became as bright as the full Moon. ... From September 2000 through March 2001, astronomer Tunc Tezel patiently photographed the planet Venus on 25 different dates as it wandered through the evening twilight. ... Arcing toward southern skies in late March, this faint comet LINEAR - the one officially designated C/2001 A2 (LINEAR) - brightened unexpectedly. ... March . ...

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... 2002 September 26 . Rocket Trail at Sunset . ... Explanation: Bright light from a setting Sun and pale glow from a rising Moon both contribute to this stunning picture of a rocket exhaust trail twisting and drifting in the evening sky. ... Still in full sunlight, the bright diffuse cloud at the top of the trail, the result of a rocket stage separation, is tinged with rainbows likely produced by high altitude ice crystals forming in the exhaust plume. ... About APOD | ... NASA Technical Rep.: ...

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• APOD: 2001 September 12 - Zodiacal Light and the False Dawn
• APOD: 2011 September 30 - Cloudy Night of the Northern Lights
• APOD: 2002 September 15 - Zodiacal Light and the False Dawn

Astronotes Armagh Planetarium's Stellar Blog! ... Space Flight . ... Posted on January 13, 2012 | No Comments The aurora is a stunning celestial event associated with EarthтАЩs polar regions. ... Continue Reading.. Posted on October 20, 2011 | ... Posted on September 26, 2011 | ... Posted on July 19, 2011 | ... Posted on May 27, 2011 | ... Time was originally defined and quantified through astronomy, and today astronomers are used to glibly talking of vast stretches of time. ...

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• - Part 27
• Astronotes | Armagh Planetarium's astronomy news from across the Universe -
• Did a Wandering Star Light Up Ancient Skies? | Astronotes

These NASA Hubble Space Telescope pictures of comet Hale-Bopp show a remarkable "pinwheel" pattern and a blob of free-flying debris near the nucleus. The bright clump of light along the spiral (above the nucleus, which is near the center of the frame) may be a piece of the comet's icy crust that was ejected into space by a combination of ice evaporation and the comet's rotation, and which then disintegrated into a bright cloud of particles. ...

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• APOD: September 5, 1998 - The Pulsar Powered Crab
• APOD: June 28, 1998 - Comet Hale Bopp Over Val Parola Pass
• APOD: September 9, 1999 - Comet Hale Bopp Over the Superstition Mountains

... In one situation, we can use light from quasars to probe the material between us and them because that light may pass through one or more galaxies or gas clouds on its way to us. The gas inside the galaxies or the intergalactic clouds acts then as a filter, absorbing selected wavelengths from the quasar light. ... Light from a quasar must pass through clouds of gas and even faint galaxies -- each leaving its imprint on the light -- before we receive it here on Earth. ... Gravitational lensing . ...

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• ASP: An Ancient Universe - The Age of Light from the Most Distant Galaxies
• ASP: Light Pollution
• ASP: Black Holes to Blackboards: Seeing the Light

... 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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• Why can I only see six of the ``Seven Sisters''?
• The Pleiades

... Posts tagged ?light curve? ... Posted by hlee . ... Tags: book , Brieman , cigar , Clinton , data mining , Friedman , Hastie , KDD , light curve , machine learning , SCMA , shaking hands , SN , statistical learning , Supernova , Tibshirani . Category: Algorithms , Cross-Cultural , High-Energy , Jargon , Methods , Quotes , Stat , Uncertainty | Comment . ... Click for what was appeared in arXiv this week. ... Category: arXiv , Data Processing , gamma-ray , Objects , Spectral , Timing , X-ray | ...

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• The AstroStat Slog Blog Archive different views
• The AstroStat Slog Blog Archive On-line Machine Learning Lectures and Notes
• The AstroStat Slog data mining

... All previous such superstars have been found along with many companion stars in the centres of crowded star clusters. The star is known as VFTS 682 from the VLT-FLAMES Tarantula Survey catalogue of the European Southern Observatory's Very Large Telescope (VLT) located at Paranal in Chile by means of the attached FLAMES instrument. ... Although VFTS 682 seems to be alone now it is not very far away from a very rich star cluster known as RMC 136 that contains several similar superstars. ...

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• Objects in the Sky
• Impact Hazard
• M. de Groot, Senior Research Associate

... The ancient chronical said about the colour rings around the Sun and the Moon, about three suns in the sky, light columns, bright lightning, different "comets" rushing to the Earth, moving among the stars or round the Earth with the sky. All these occurrences may be divided into three categories: one that occur in the near or far space, processes going on in the Earth atmosphere under the influence of cosmic factors and at last the occurrences connected with the Earth atmosphere. ... Rainbow . ...

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• galophotoe
• merkurie

... The concerns here are similar to those for observing bright targets; saturation and blooming of the bright companion PSF must not impact the faint target. Also, one may need to consider subtracting the PSF of the bright object, and effects which limit the accuracy of that subtraction. If the bright companion will saturate and bloom, it will be necessary to rotate the CCD so that blooming along the CCD columns does not obliterate the faint target. ...

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• Andy Fruchter's Homepage
• WFPC2 Bright Star Avoidance Regions
• Dr. Adam Riess - Dark Energy

... For a hundred years, astronomers have been trying to pin down the exact distance to one of our nearest neighbouring galaxies, the Large Magellanic Cloud. ... In the case of the Large Magellanic Cloud, its distance was determined by looking at pairs of stars that orbit each other. ... Finding the accurate distance to the Large Magellanic Cloud is an important breakthrough, because the distance to stars in that galaxy can be used to find the distance to even more remote galaxies. ...

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• The Very Large Telescope Project
• EoN_sky

You Can Make Stellar Images Brighter . Articles | ... A few months ago I wrote an article titled "You Can’t Make Them Brighter". So why am I now writing that you can make them brighter. ... The image of a focused star is actually a small disk called the Airy disk, named after the 19 th century scientist Sir George Airy. ... For a given aperture, a smaller Airy disk means that the light is focused to a smaller disk and is therefore brighter. ... www.astronomy.net . About Astronomy Net | ...

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• You Can't Make Stellar Images Brighter - an Astronomy Net Article

... Bad Astronomy . Misconceptions . ... Bad Astronomy : "We're light years more advanced than our competition!" ... Even the closest astronomical object, the Moon, is 400,000 kilometers away! ... A beam of light will travel 9,500,000,000,000 kilometers in one year. This distance is defined as a light year ; the distance light travels in a year. ... This is another example of Bad Astronomy; like a light year, a parsec is a unit of distance, not time (to be specific, it equals 3.26 light years) . ...

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• Phil Plait's Bad Astronomy: Mad Science
• Phil Plait's Bad Astronomy: Bad News
• Phil Plait's Bad Astronomy: Bitesize Astronomy

Crater Gassendi . ... I made this drawing was made on the 26th of november 2001. If you compare this one with the previous drawing of Gassendi (below) the differences are clear. ... This drawing was made on the 28th of september 2001. After nearly a full month without observations I had a one hour gap between the thicker clouds. ... This drawing was made on the 29th of august 2001. ... This drawing was made on the 27th of august 2001. ... This drawing was made on the 25th of august 2001. ...

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This NASA Hubble Space Telescope image, taken in near-infrared light, transforms the pillars into eerie, wispy silhouettes, which are seen against a background of myriad stars. The near-infrared light can penetrate much of the gas and dust, revealing stars behind the nebula as well as hidden away inside the pillars. Some of the gas and dust clouds are so dense that even the near-infrared light cannot penetrate them. ... NASA/ESA/The Hubble Heritage Team (STScI/AURA) ...

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• http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7BA9082E57-590C-4776-A816-2EB88492185D%7D
• http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7BA477A9E5-97E9-4F9A-BE41-F6A8BE89FA64%7D
• Astronomers watch delayed broadcast of a rare celestial eruption | Astronomy...

... They cover a period of 4 days in which the Supernova continues to rise in brightness (what astronomers call magntiude). ... First Image Taken on March 11 at 8:22 UT. Second Image Taken on March 12 at 8:52 UT. ... The supernova is the same brightness as in the previous image taken 2 hours ago . ... This image, taken 24 hours after the previous image, shows the supernova to be another 0.21mag (or about 25%) brighter. ... Hopefully the images do show that the brightness of the Supernova is changing. ...

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• Low Surface Brightness Galaxy Gallery

... Image Quality of the VLT . Total Optical Control . First light for the ESO VLT unit telescope 1 occurred during the workshop. ... The image shown (Figure 1 ) here was obtained with the VLT on May 16, 1998, in red light (R band), i.e. while the mirror was still uncoated. ... In this diagram (FIgure 2), the measured image quality of the VLT UT1 astronomical images is plotted versus the ``seeing", as measured by the Seeing Monitor, a small telescope also located on top of the Paranal Mountain. ...

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The Sun is our nearest star and the source of energy for life on Earth. ... For centuries astronomers wondered whether they were clouds floating in the Sun's atmosphere, but we now know that they really are huge regions of magnetic field, about as intense as the field at the poles of an iron magnet. ... Such abrupt events were named solar flares , and what made them especially interesting was that occasionally, after a prominent flare, a magnetic storm would erupt on Earth. ...

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• Comet Introduction
• First X-Rays From a Comet Discovered
• Electromagnetic Waves

Embargoed until 11am, Thursday 6th May SOME BLACK HOLES ARE PINK A group of Australian astronomers have found that some black holes are bright pink! ... They have such intense gravity fields that they even suck in light. ... Black holes like this are called quasars, and were first discovered in the 1960s."Until now", Dr Francis said, "only blue quasars had been seen, and it was believed that the debris swirling around black holes should emit only blue light, not pink." ...

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• http://www.mso.anu.edu.au/~bessell/thumbnails/images.txt
• The Zodiacal light seen above the eastern horizon nearly two hours before
• The Zodiacal light seen above the western horizon nearly two hours after sunset

... About meteorites . ... Meteorite Encyclopedia . ... About laboratory . ... On the night of September 24-25, in the north of Irkutsk Oblast, local residents saw a brightly glowing space object draw a line across the sky and fall into the taiga. ... But scientists learned of the heavenly visitor only on October 3, when a fax arrived at the Institute of Sun And Earth Physics from Bodaibo. ... The first thing we did was to interview residents of villages located along the meteor's flight path. ...

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