... Bad Astronomy . ... Mad Science . ... if hubble was pointed at earth, what could it resolve? is it too bright? ... This type of image is called a ``flat field'', because you want the field of view to look as flat as possible. In space there aren't any flat fields you can use, but we do have one right here: the Earth. ... It takes a lot of sophisticated computer processing to turn this into a real flat field for Hubble to use, but luckily there are a lot of smart people working on the problem. ...

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• Phil Plait's Bad Astronomy: Misconceptions
• Phil Plait's Bad Astronomy: Bitesize Astronomy

... In the famous Pleiades star cluster, a star's light is slowly destroying a passing cloud of gas and dust. ... Layered Mars: An Ancient Water World . ... The Circinus Galaxy . ... Powerful forces are at play in the nearby Circinus Galaxy. ... Earth's 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. The North Magnetic Pole is currently located in northern Canada. ...

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Scientists Discover Surface Features on Titan . ... Scientists for the first time have made images of the surface of Saturn 's giant, haze-shrouded moon, Titan. ... Peter H. Smith of the University of Arizona Lunar and Planetary Laboratory and his team took the images with the Hubble Space Telescope during 14 observing runs between Oct. ... About three weeks before Cassini's first flyby of Titan, the spacecraft is to release the European Space Agency's Huygens Probe to parachute to Titan's surface. ...

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• Hubble Finds A Bare Black Hole Pouring Out Light
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... 2015 April 19 . Ring Galaxy AM 0644-741 from Hubble . Image Credit: Hubble Heritage Team ( AURA / STScI ), J. Higdon ( Cornell ) ESA , NASA . Explanation: How could a galaxy become shaped like a ring? ... That galaxy, AM 0644-741 , is known as a ring galaxy and was caused by an immense galaxy collision. ... The intruder galaxy is just outside of the frame taken by the Hubble Space Telescope . ... Ring galaxy AM 0644-741 lies about 300 million light years away. ... About APOD | ...

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• APOD: 2004 April 26 - Ring Galaxy AM 0644 741 from Hubble
• APOD: 2005 October 22 - Ring Galaxy AM 0644-741 from Hubble
• APOD: 2008 November 4 - The Double Ring Galaxies of Arp 147 from Hubble

... Comet Animation . ... Comet structures are diverse and very dynamic, but they all develop a surrounding cloud of diffuse material, called a coma, that usually grows in size and brightness as the comet approaches the Sun. ... As comets approach the Sun they develop enormous tails of luminous material that extend for millions of kilometers from the head, away from the Sun. ... The evaporated molecules boil off and carry small solid particles with them, forming the comet's coma of gas and dust. ...

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In version 2 of the data reduction, we include frames where there is some visible scattered light, but where the background is still reasonably low (not more than a few times the minimum background). ... Briefly, the scattered light subtraction was done by registering the bright and dark images, subtracting the dark from the bright to remove the source, smoothing to remove any residual sources left over after the subtraction, and subtracting this smoothed sky image from the bright frame. ...

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• GRB 990123Page
• Habitable Worlds Across Time and Space
• The Hubble Deep Field - scattered light subtraction

The image at left shows the nearby Andromeda galaxy. The rectangular box marks the region probed by NASAтАЩs Hubble Space Telescope (a blend of visible and ultraviolet light). ... The bright area near the center of the image is a grouping of stars nestled around the galaxy's black hole. The blue dots sprinkled throughout the image are ultra-blue stars whose population increases around the crowded hub. The square box shows a close-up view of an area around the core. ...

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• http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B7FB1DE71-9334-49A7-B8C1-938ACCA4A41F%7D
• http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B0087E198-2393-4BB6-8511-6BF14A7045DA%7D
• http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7BAC8D474C-02CD-44C2-BAFD-5A0FDA9BC724%7D

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Aurora . ... Corona . Fireballs . ... Zodiacal Light . ... The first thing to do is get acquainted with what the night sky looks like. ... The National Schools Observatory web site has very good horizon views of the sky for the current night. ... If the object is moving slowly across the sky then it may be one of the larger satellites. ... Cloudbait Observatory - October 2002 . ... October 2003 Aurora at Armagh . ...

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... title='Мышь проводная Dialog Pointer Optical MOP-04BU' border='0' align='left' width='120' style='margin-right: 20px;' hspace='7' vspace='5'/> . ... Платье Love & Light. ... Платье - Laura Bettini - Laura Bettini . ...

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... Flux density at 1 GHz (/Jy): 2720 . ... 1991, ApJ, 373, 146. ... ADS . ... VLA at 1.4 GHz and 4.8 GHz (both 1".3), for polarisation studies. ... VLA at 1.4 GHz and 4.8 GHz, for proper motion studies. ... 151 MHz observations for bulk expansion studies. ... Chandra observations, showing outer shock. ... Fesen et al. ... Spitzer observations. ... Chandra observations of rim. ... 2006, ApJ, 636, 848. ... 2006, ApJ, 647, L41. -ray line observations. ... Spitzer and Chandra observations for 3-D structure...

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• G120.1+1.4
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... Posts tagged ?light curves? ... If you find any problems of viewing the slog, please notify me. ... 2007? ... Tags: ARCH , Bayesian Block , challenges , change point problem , GARCH , light curves , summer school , X-ray . ... Algorithms arXiv Astro Bad AstroStat Bayesian CHASC Cross-Cultural Data Processing Fitting Frequentist Galaxies gamma-ray High-Energy Imaging Jargon Job Languages MC MCMC Meta Methods Misc News Nuggets Objects Optical Physics Quotes Spectral Stars Stat Timing Uncertainty X-ray...

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• A Quasar Primer
• dictionary
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... Armagh Planetarium . ... Universe . ... Posted on December 3, 2015 | ... Continue Reading.. ... No Comments A spectacular multi-coloured fireball was witnessed in Ireland and Scotland by dozens of people on the evening of 29 November 2015. ... 1 Comment Is this a new dawn for suborbital travel? ... Hello, IтАЩm Colin, welcoming you to Astronotes, the PlanetariumтАЩs official blog. Here you will find the latest news and views from the fascinating worlds of astronomy and space exploration. ...

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• Astronomy FAQs
• Hubble sees Saturn in a new light | Astronotes
• Finding Your Way in the Milky Way | Astronotes

The Universe was not concentrated into a point at the time of the Big Bang. But the observable Universe was concentrated into a point. The distinction between the whole Universe and the part of it that we can see is important. ... If we go to smaller and smaller times since the Big Bang, the green circle shrinks to a point, but the 78 billion light year box is always full, and it is always an infinitesimal fraction of the infinite Universe. ... FAQ | Tutorial : Part 1 | Part 2 | ...

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• Spectroscopy
• Doppler Shift
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An Ancient Universe: How Astronomers Know the Vast Scale of Cosmic Time . THE ANCIENT UNIVERSE . c) The Age of Light from the Most Distant Galaxies: The "Time Machine" Effect . ... Thus we are actually seeing these galaxies not as they are today, but as they were billions of years ago. ... The Universe: An Overview | ... The Ancient Universe - The Age of the Expanding Universe - The Age of the Oldest Stars - The Age of Light From Distant Galaxies - The Age of the Chemical Elements | ...

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• ASP: Light Pollution
• ASP: Donor Bill of Rights
• ASP: Black Holes to Blackboards: Getting a Global Sense

I was wondering what conditions should be met to have the "darkest" sky .. ... Upon the above publication of the Southern Galactic hemisphere, TunГ Tezel started seeking opportunities to create the Northern counterpart image. ... So, the initial quest of having the darkest possible sky have delivered us these two all-sky images of the two galactic hemispheres as seen from Planet Earth. Zoomable and 'full-screenable' fisheye view of the "darkest sky" Southern Galactic Hemisphere image. ...

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• The Very Large Telescope Project
• EoN_sky

... The best-known early observations of the Sun from space were the ones made in 1973 from the space station Skylab . ... Field lines of coronal holes, on the other hand, seem to extend far outwards, their ends dragged by the solar wind to the Earth's orbit and far beyond it. ... It was immediately suspected that such bubbles--named "Coronal Mass Ejections" (CMEs) marked the first stage of the development of interplanetary plasma clouds, some of which initiated magnetic storms when they reached Earth. ...

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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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• Observation Report From Coyle 07/19/03 - an Astronomy Net Observation_reports
• You're On The Right Track - an Astronomy Net Bigbang Forum Message
• Does Sound Or Light Stop At Some Point? - an Astronomy Net Blackholes2 Forum

... 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) . ...

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... Meade Instruments Corporation . ... Choosing the Right Microscope . ... On most microscopes the specimen glass remains fixed while the microscope's objective lens and eyepiece move as a unit up or down to focus the image. ... Eyepieces of varying powers work with objective lenses of varying powers to yield a range of microscope magnifications. ... Magnification: The effective magnification of a microscope is determined by multiplying the eyepiece power by the objective lens power . ... about meade |...

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... The Milky Way - and the lights of CoonabarabrтАж . Sidebar Left . Sidebar Top . No Sidebar . ... Title: The Milky Way - and the lights of Coonabarabran - behind the dome of the ANU 40-inch telescope. Description: The dome of the UK Schmidt telescope is just to the right of the town lights. ... The Milky Way - and the lights of Coonabarabran - behind the dome of the ANU 40-inch telescope. The dome of the UK Schmidt telescope is just to the right of the town lights. ...

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• Siding Spring Survey
• 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