... Credit Copyright: NASA , ESA , and the Hubble Heritage Team ( STScI / AURA ) Explanation: The Hubble Space Telescope has resolved individual stars in a spectacular new image of nearby spiral galaxy M81. ... Wilson 100-inch Hooker Telescope in the 1920s that resolved stars in neighboring galaxy M31 . ... Publications with keywords: M 81 - HST - spiral galaxy . Publications with words: M 81 - HST - spiral galaxy . ... NGC 2683: Edge On Spiral Galaxy . ... Anemic Spiral NGC 4921 from Hubble . ...

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• Астронет > Bright Spiral Galaxy M81 from Hubble
• Journal "Peremennye Zvezdy"
• Anemic Spiral NGC 4921 from Hubble

... 2007 May 29 . Bright Spiral Galaxy M81 from Hubble . Credit: NASA , ESA , and the Hubble Heritage Team ( STScI / AURA ) . Explanation: The Hubble Space Telescope has resolved individual stars in a spectacular new image of nearby spiral galaxy M81. ... Edwin Hubble was able to use individual Cepheid variable stars to show that M31 was not nearby swirling gas but rather an entire galaxy like our Milky Way Galaxy . ... Light takes about 12 million years to reach us from M81. ... About APOD | ...

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The HDF observations were carefully scheduled to minimize the effect of scattered light. Nevertheless, Scattered light from the bright earth produces a visible X pattern in about 25% of the HDF data frames. ... The filled-in portion of the histograms indicates data where the scatttered light patern is visible to the eye. ... A major difference between version 1 and version 2 of the data reduction was the treatment of scattered light. ... version 1 . ...

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• The Hubble Deep Field - version 2 scattered light subtraction
• Roelof's Publications
• HST Spectral Maps of Accretion Disks in Cataclysmic Binaries

An image of the grand design of spiral galaxy M100 obtained with NASA's Hubble Space Telescope resolves individual stars within the majestic spiral arms. ... Hubble has the ability to resolve individual stars in other galaxies and measure accurately the light from very faint stars. This makes space telescope invaluable for identifying a rare class of pulsating stars, called Cepheid Variable stars embedded within M100's spiral arms. ... 617) 495-7062 . Fax: (617) 495-7356 . ...

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... NASA's Hubble Space Telescope has provided a never-before-seen view of a warped disk flooded with a torrent of ultraviolet light from hot gas trapped around a suspected massive black hole. ... This composite image of the core of the galaxy was constructed by combining a visible light image taken with Hubble's Wide Field Planetary Camera 2 (WFPC2), with a separate image taken in ultraviolet light with the Faint Object Camera (FOC). ... The inset box shows Hubble Space Telescope's field of view. ...

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• STScI- PRC99-10: Hubble's Infrared Galaxy Gallery
• Hubble Observations Shed New Light on Jupiter Collision
• ESA Hubble Information Centre

In this gallery are many images of Low Surface Brightness Galaxies which have recently been discovered and analyzed. ... The central surface brightness of this galaxy is 24.28 . Malin 2 This galaxy is another huge disk galaxy with a scale length of 15 kpc and a redshift of 15000 km/a. The high surface brightness knot in one of its spiral arms actually has the same color, luminosity and H-alpha equivalent width as the entire Large Magellanic Cloud . ... Truly it is a Low Surface Brightness Galaxy. ...

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• The Galaxy Gallery Page 6: Comparative Morphology
• Galaxy Gallery Page II

... ESO is building what will be the World's largest optical telescope array, The Very Large Telescope (VLT). The VLT Project organisation is responsible for the design and construction of the Unit Telescopes, including enclosures, optics, adapter-rotators and coating unit. ... Unit Telescopes Overview - This page is outdated, an update is in process. ... Secondary mirror (M2 Unit) - This page is outdated, an update is in process. ... Coating Unit - This page is outdated, an update is in process. ...

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• Los Cielos de Am , The darkest sky and the two galactic hemispheres
• The Brightness of the Night Sky
• Infrared/visible light comparison view of the Helix Nebula | ESO

... Another option is to buy slides of astronomical objects at different wavelengths to show students why astronomers use different bands of the spectrum to bring out specific characteristics in celestial objects. ... He then uses the camera to scan the entire classroom, asking students to identify what they are seeing. ... Once students see light in action, they can investigate its properties - such as frequency, wavelength, and interference - with wave experiments. ...

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• ASP: By the Light of the Moon
• ASP: Bright-Lights, Big-City, Overcast Survival Guide
• ASP: Lighting the Nebulae

... Feeding the Monster: Gas Caught in its Death Spiral into a Massive Black Hole . ... Stromlo Professor Mike Dopita have used the Hubble Space Telescope to discover how a massive Black Hole in a nearby galaxy feeds itself. ... Earlier Hubble Telescope data obtained by another team member, Professor Holland Ford of Johns Hopkins University in Baltimore, Maryland, had found a disk of gas rushing around the Black Hole at a speed of 500 kilometers a second. ...

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• The High-Z SN Search Description

... For more distant stars we must use other techniques. ... Hence if we see a distant galaxy and can pick out any cepheids lying within it, we can calculate its distance. ... Here then is another method to gauge the size of the Universe and there are yet more. volume at high enough temperature a nuclear fusion reaction sweeps across the white dwarf's surface and eventually we will see a spectacularly bright new star (hence nova) in our skies. ... Why is this relevant to the size of the Universe? ...

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• http://www.armaghplanet.com/pdf/AstroTopics/Beyond%20the%20Solar%20System/Guide%20to%20the%20galaxies.pdf
• Amazing multi-spectral view of Andromeda Galaxy | Astronotes
• Hubble sees Saturn in a new light | Astronotes

In this image by NASA's Hubble Space Telescope, an unusual, ghostly green blob of gas appears to float near a normal-looking spiral galaxy. The bizarre object, dubbed Hanny's Voorwerp (Hanny's Object in Dutch), is the only visible part of a 300,000-light-year-long streamer of gas stretching around the galaxy, called IC 2497. ... This Hubble view uncovers a pocket of star clusters, the yellowish-orange area at the tip of Hanny's Voorwerp. ... NASA/ESA/W. Keel (Univ. of Alabama)/the Galaxy Zoo Team ...

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• Bright planets meet at dusk | Astronomy.com
• Hubble observes a dwarf galaxy with a bright nebula | Astronomy.com

... The Hubble Space Telescope is a collaboration between ESA and NASA. ... In many ways Hubble has revolutionised modern astronomy, by not only being an efficient tool for making new discoveries, but also by driving astronomical research in general. ... However, in the last few microseconds before light arrives at telescope mirrors on Earth it must travel through our turbulent atmosphere and the fine cosmic details become blurred. ... Putting a telescope in space is one way of evading this problem. ...

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• Space Telescope-European Coordinating Facility

ATMoB "Galaxy Observing Award " Guidelines Purpose: To promote observing among the membership of the Amateur Telescope Makers of Boston through participation in the Galaxy Observing Awards program. ... Examples of elliptical galaxies: M49, M59, M60, M87, NGC 4125. Limiting Magnitude Assessment: Spirals: A spiral galaxy consists of a flattened disk, with stars forming a (usually two-armed) spiral structure, and a central concentration of stars known as the bulge. ...

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• ATMoB: Christmas Mystery
• Amateur Telescope Makers of Boston

... STScI-PRC95-45a CRUCIBLE OF CREATION: PANORAMIC HUBBLE MOSAIC ZOOMS IN ON MAELSTROM OF STAR BIRTH This spectacular color panorama of the center the Orion nebula is one of the largest pictures ever assembled from individual images taken with NASA's Hubble Space Telescope. ... Though this 2.5 light-years wide view is still a small portion of the entire nebula, it includes almost all of the light from the bright glowing clouds of gas and a star cluster associated with the nebula. ...

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• What is HISA?
• The Pleiades
• New Results Confirm Dark Galaxy Existence

... 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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• Spacecraft Observing the Sun and the Heavens above
• Venus Picture List
• Titan Press Release

... 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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• Anatomy of a decline
• Armagh Observatory
• Refereed Journal Publications 1999

... Karachentsev I.D., Dolphin A., Tully R.B., Sharina M., Makarova L., Makarov D. , Karachentseva V., Sakai S., Shaya E.J. Advanced Camera for Surveys Imaging of 25 Galaxies in Nearby Groups and in the Field . ... Karachentseva V.E., Melnyk O.V., Vavilova I.B., Makarov D.I. Virial and total masses of galaxy triplets in the Local Supercluster . 2005, Astron. ... Karachentsev I.D., Makarov D.I. "The Galaxy Motion Relative to Nearby Galaxies and the Local Velocity Field" . ...

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• Cosmological Gene project

... Ciel Espace, le magazine qui vous guide toujours plus loin . ... des pages consacr?йes ?а la publication de vos photos Mais c'est aussi une vraie communaut?й avec laquelle partager votre passion et nourrir votre curiosit?й. Accueil La premi?иre c?йph?йide de Hubble . ... C'est en observant les ?йtoiles variables de type c?йph?йide que l'astronome Edwin Hubble a mesur?й pour la premi?иre fois la distance de la galaxie M31 ?а l'aide du t?йlescope Hooker de 2,5 m du mont Wilson, en 1923. ...

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• PlanУ?te de Fomalhaut : ALMA fait mentir Hubble | Ciel et Espace
• Le radiot?йlescope Alma ouvre les yeux sur les Antennes | Ciel et Espace
• Une n?йbuleuse plan?йtaire en spirale | Ciel et Espace

... 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: Mad Science
• Phil Plait's Bad Astronomy: Bad TV
• Phil Plait's Bad Astronomy: Misconceptions

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
• OSETI On Steroids (Venus Lights Up In Spots) - an Astronomy Net Seti Forum
• Astronomy Terms - To Help You Study The Universe - an Astronomy Net Article