... Tonight's Sky . ... The Magazine . ... Star Atlas . ... An artificial comet holds secrets to Earths life . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . ... The planet has extreme temperature swings and perhaps active lava flows. ... A digital supplement to Astronomy magazine. ... Join TravelQuest International with Astronomy and Discover magazines on one of three great tour options surrounding this celestial spectacle . ... Astronomy Magazine . ...

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• Bright planets meet at dusk | Astronomy.com
• galaxy clusters | Astronomy.com
• Two open clusters in Canis Major, emission nebula NGC 2316, and spiral galaxy

... 2002 June 20 . Bright Galaxy M81 . ... Explanation: Big and beautiful spiral galaxy M81 , in the northern constellation Ursa Major , is one of the brightest galaxies visible in the skies of planet Earth. This superbly detailed view reveals its bright nucleus, grand spiral arms and sweeping cosmic dust lanes with a scale comparable to the Milky Way . ... The errant dust lane may be the lingering result of a close encounter between M81 and its smaller companion galaxy, M82 . ... About APOD | ...

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• APOD Index - Galaxies: Clusters of Galaxies
• APOD: 2013 April 16 - Grand Spiral Galaxy M81 and Arp's Loop
• APOD: 2012 April 3 - M46 and M47: Star Clusters Young and Old

... 29.04.2010 . ... Credit: Stephen Leshin Explanation: Barred spiral galaxy NGC 4731 lies some 65 million light-years away. ... Colors in this well-composed, cosmic portrait , highlight plentiful, young, bluish star clusters along the galaxy's sweeping spiral arms . ... NGC 4697 is beyond this frame above and to the left, but a smaller irregular galaxy NGC 4731A can be seen near the bottom in impressive detail with its own young blue star clusters. ... Publications with keywords: spiral galaxy . ...

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• XWare > APOD

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 IX: Clusters of Galaxies
• The Galaxy Gallery: Messier Objects
• Astronomy Plus CCD Images of Galaxies

Astronotes Armagh Planetarium's Stellar Blog! ... Stars . ... Starbursts are short-lived events, stars are forming so quickly that the reservoirs of interstellar gas from which stars are coalescing would be used up on a timescale much shorter than the age of the galaxy . ... Strong stellar winds from giant new stars in the starburst region combine with the blasts of supernovae to push a mighty flood of extremely hot gas, a ?superwind? from the galaxy thousands of light years into intergalactic space. ...

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• ESO | Astronotes - Part 3
• Galaxy NGC 6744: the Milky Way's Cosmic Twin? | Astronotes
• Armagh Planetarium's Stellar Blog!

... April 2, 1999 . Stars of NGC 206 . ... Explanation: Nestled within the dusty arms of the large spiral galaxy Andromeda (M31), the star cluster NGC 206 is one of the largest star forming regions known in our local group of galaxies. The beautiful bright blue stars of NGC 206 betray its youth - but close, systematic studies of variable stars in and around NGC 206 will also accurately reveal its distance. ... About APOD > . ...

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• APOD: April 12, 1999 - Nearby Spiral Galaxy NGC 4945
• APOD: December 13, 1997 - The Coma Cluster of Galaxies
• APOD: December 18, 1999 - Irregular Galaxy Sextans A

... 21 cm HI-line spectra of southern ZOA galaxies . ... Galaxies are distributed in a cosmic web consisting of high-density clusters and galaxy groups, which are embedded in walls, and filaments surrounding large low-density regions, the so-called voids. ... The attached image shows the distribution of the 394 inclined spiral galaxies selected from the Parkes HI Zone of Avoidance survey (HIZOA) color coded by their velocity. ... today * ATNF | Parkes | ...

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• Evolutionary Paths in Galaxy Morphology
• Galaxies in the Local Volume Pictures

... Abstract . ... The Ages of Globular Clusters and the Population II Distance Scale . ... HST/FGS Astrometric Search for Young Planets Around Beta Pic and AU Mic . ... Luminous and dark matter in disk galaxies from strong lensing and stellar kinematics . ... WFPC2 Imaging of Fomalhaut b: Determining its orbit and testing for H-alpha emission . ... Globular clusters are the oldest structures within the Milky Way that are directly accessible to observation. ... Past weeks: . ...

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• HST this week
• HST this week: 096
• Gregory F Snyder

... Science User Portal . ... ESO, the European Southern Observatory . ... Travel and Contacts . Travel to ESO Headquarters . ... Travel to E-ELT Armazones . ... Survey Telescopes . ... Galaxy Clusters . ... Star Clusters . ... Stars@ESO . ... ESO Science Newsletter . ... Catch a Star 2013 . Catch a Star 2011 . ... The star cluster, known as NGC 3293, would have been just a cloud of gas and dust itself about ten million years ago, but as stars began to form it became the bright group we see here. ...

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• The composition of a star that should not exist | ESO
• ESO - Dynamics of Low-Mass Stellar Systems: From Star Clusters to Dwarf...
• Bright Galaxies in the Virgo Cluster | ESO

... GSAOI Home . ... Science . ... Deep J , H , and K imaging is required of Galactic and Magellanic Cloud analogs of the super star clusters identified in starburst galaxies. ... Images of the 30 Doradus star cluster in the Large Magellanic Cloud in the visible ( left panels ) and near-infrared ( right panels ) take from the ground ( top panels ) and with the Hubble Space Telescope ( bottom panels ). The fields of the GSAOI detectors are shown as four green squares in each frame. ...

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• Mike Bessell, MSSSO - Images
• Planet Pictures
• GSAOI Bulk Motions Science Page

... Bad Astronomy . ... Bitesize Astronomy . ... Bad Astro Store . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... For a hundred years or so now we have looked at pictures of spiral galaxies and wondered at their beauty. ... The brightest stars will light up the clouds, making them visible. So when you see a "grand design" spiral, what you are really seeing are the gas clouds being lit by the bright stars that were formed as the clouds collide. ... 2008 Phil Plait. ...

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• Phil Plait's Bad Astronomy: Misconceptions
• Phil Plait's Bad Astronomy: Q and BA

... Radio source identifications . The Web-server of the Astronomical Institute of the St.-Petersburg University opens the experimental service on assignment of clusters data. At present only the data about radio sources in ACO clusters of galaxies are reasonably complete, while only restricted optical information is in our database. Later on, we also intend to include X-ray data and data about brightest cluster galaxies (BCG). ... ACO: radio optic ( for example, A0690 and " optic "), . ...

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• A 1400-MHz Survey of 1478 Abell Clusters of Galaxies
• Gravitational Lensing by Clusters of Galaxies
• A 20 cm VLA survey of Abell clusters of galaxies

... galaxies: bulges galaxies: clusters: general galaxies: clusters: individual: . ... star formation statistics stellar content structure Cosmology ( cosmology :) cosmic background radiation ( cosmology :) cosmological parameters cosmology : miscellaneous cosmology : observations cosmology : theory ( cosmology :) dark ages, reionization, first stars ( cosmology :) dark energy ( cosmology :) dark matter ( cosmology :) diffuse radiation ( cosmology :) distance scale ( cosmology :) early Universe (...

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• important_en
• articles_flera_en
• A unique isolated dwarf spheroidal galaxy KKR25

... The Sun . Does anyone know how many stars are there in the solar system? Come take a look at the Sun. See that? ... Did you know all the stars you see when you look up are inside our galaxy! ... Did you know that our Sun and solar system were born in a cloud of gas and dust like this. ... We're looking at a place where stars are being born. ... Sharing the Universe is based upon work supported by the Informal Education Division of the National Science Foundation under Grant no DRL-0638873. ...

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• ASP: Big Clusters, Tiny Galaxies
• ASP: Black Holes to Blackboards: Drifting Through Andromeda
• ASP: Taking a Grand Virtual Voyage in the Milky Way

... 1st Announcement IAU Symposium 312 Star Clusters and Black Holes Across Cosmic Time, Beijing, China, Aug. 25-29, 2014 . ... SUBJECT: 1st Announcement IAU Symposium 312 Star Clusters and Black Holes Across Cosmic Time, Beijing, China, Aug. 25-29, 2014 . ... which will be held in Beijing, P.R. China, from August 25-29, 2014, hosted by Chinese Academy of Sciences . ... China), . ... 1st Announcement IAU Symposium 312 Star Clusters and Black Holes Across Cosmic Time, Beijing, China, Aug. ...

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• Achievements - Page 4
• Dept. for Physics of Stars&Galaxies

... Subject of Astronomy. ... Basis of Spherical and Practical Astronomy. ... Celestial Sphere. ... Changes of Star's Coordinates as a Result of Daily Rotation of Celestial Sphere. ... Time Measuring. ... Changes of Solar Equatorial Coordinates. ... Stellar Day, Stellar Time. ... Real Solar Time. ... Mean Solar Time. ... Connections between Stellar and Mean Time. ... Apparent Path and Configuration of Planets. ... Ways of Energy Transportation to Stellar Surface.Basis of Spectral Analysis. ... Solar...

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• Stellar Astronomy
• Extragalactic Astronomy

... The Pleiades star cluster, also known as the Seven Sisters and Messier 45, is a conspicuous object in the night sky with a prominent place in ancient mythology . ... The stars in the Pleiades are thought to have formed together around 100 million years ago, making them 1/50th the age of our sun, and they lie some 130 parsecs (425 light years ) away. ... Data for these stars are listed in a table below. ... Yes . ... WEBDA Pleiades cluster data . ... M45: The Pleiades Star Cluster (2007 November 18) ...

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• The Evolution of Galaxies Seen Through The Neutral Hydrogen Line The Evolution
• Searching the Environment around LyAlpha Absorbers
• Pulsar Highlights - A Dozen new MSPs in Globular Clusters

... About ATMoB . ... The Observing Committee is starting an Observing Awards Program to promote observing among the membership of the Amateur Telescope Makers of Boston. ... Participant must be a current member of the Amateur Telescope Makers of Boston . ... To qualify for your Observing Award Certificate, turn in your worksheet and drawings to an ATMoB Observing Committee member or observing@atmob.org . ... This Excel sheet has useful macros. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

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• Mars pictures from Stellafane by Paul Valleli

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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• Southern SHARC survey
• The Chandra Multiwavelength Project (ChaMP)
• The Chandra Multiwavelength Project (ChaMP) - Science Goals

Maidanak Laboratory is a part of Sternberg Astronomical Institute of Moscow State University. ... Observations are conducted with 1.5 meter RC telescope AZT-22 of Maidanak Observatory (Uzbekistan). rus . ... maidanak lab home page . ... at Sternberg Astronomical Institute . ... 2000). ... Because of technical reasons, we had to use three different CCD cameras in our observations, Pictor-416 camera in 1995, Pictor-416 and TI 800 x 800 cameras in 1997 and 1998, and ST-7 camera in 1999 and 2000. ...

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• Yuri Nicolaevich Efremov - My Home Page
• Anatoly V. Zasov
• Division of the Galaxy and Variable Stars