... Named Valles Marineris, the grand valley extends over 3,000 kilometers long, spans as much as 600 kilometers across, and delves as much as 8 kilometers deep. T Tauri and Hind s Variable Nebula . ... The yellowish star near center in this remarkable telescopic skyview is T Tauri, prototype of the class of T Tauri variable stars. ... Last week's Full Moon was hard to miss. ... The CMB Cold Spot . ... Parthenon Moon . ... Did you see the Full Moon last night? ... But the Full Moon really.. ...

... 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 Unit Telescopes Overview - This page is outdated, an update is in process.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 Secondary mirror (M2 Unit) - This page is outdated, an update is in process.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 Coating Unit - This page is outdated, an update is in process. ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. February 16, 1999 . The Large and Small of M87 . ... Explanation: The small core of elliptical galaxy M87 appears to be energizing its whole galactic neighborhood. Recent images from the Very Large Array (VLA) of radio telescopes indicate that huge bubbles of hot gas not only exist but are still being created. ... About APOD > . ...

... Today this year's largest group of sunspots will cross the Sun's central meridian. ... The next day, the number of spots in the group reached five, and the day after, on June 2nd, it was possible to count thirteen sunspots on solar disk, which had been clear prior to this. ... This year's two most powerful active areas, which passed across the solar disk at the beginning of May, 2009, are set to appear in the Sun's eastern sector in two days, on June 6th. ...

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 . ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2000 February 28 . The Sombrero Galaxy from VLT . ... FORS1 , VLT ANTU , ESO . ... Reasons include the Sombrero 's unusually large and extended central bulge of stars, and dark prominent dust lanes that appear in a disk that we see nearly edge-on. Billions of old stars cause the diffuse glow of the extended central bulge. ... About APOD | ...

... 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. ...

. 66%) of the extreme AGB stars are variable and only smaller fractions of carbon-rich (6.1%) and oxygen-rich (2.0%) stars are detected as variable sources. We also detect a population of variable young stellar object candidates. [ ADS ] . ADS Citation Query . # citations = 41 . citations vs. year [year,citations] . [2009,6][2010,6][2011,8][2012,4][2013,4][2014,4][2015,9] . Copyright 2012 Karl D. Gordon All Rights Reserved

... Observing . ... Home Education Workshops at Adorama Astronomy Workshop: Observing Variable Stars from the City ? February 15, 2015 . ... Beyond New York City . ... Observing Resources for Amateur Astronomers - Part 1: Beginning Observers . ... A History of the First Forty Years of the Amateur Astronomers Association . ... Presented by€а Adorama €аFor the Amateur Astronomers Association of New York . ... 2016 Amateur Astronomers Association of New York Designed by Press Customizr Powered by . ...

... Astrophysics Group . Research . Atacama Large Millimetre Array (ALMA) . ... Cosmic Microwave Background (CMB) . ... Galaxy Formation and Evolution . ... The Astrophysics Group is actively involved in the ALMA project , a submillimetre interferometer being built in northern Chile. ... If you are interested in doing research in this area, please visit our Graduate Research Opportunities web pages. ... 2013, Astrophysics Group, Cavendish Laboratory, JJ Thomson Avenue, Cambridge, CB3 0HE . ...

... Armagh Planetarium . ... Universe . ... Posted on February 24, 2012 | 4 Comments Beautiful colour images of nebulae grace astronomy books and websites and have spread to mainstream culture. ... Continue Reading.. ... Hearing news like this certainly makes one sit up and pay attention, but is it is correct? ... This rock is about 9m (30ft) across, meaning that it [ ] . ... Posted on January 30, 2012 | ... Hello, IтАЩm Colin, welcoming you to Astronotes, the PlanetariumтАЩs official blog. ...

... On the morning of Thursday, 26 February, amid the Gal pagos Islands, the Sun will fade from view. Not the culmination of ancient prophecy, but none less mystical, Earth's small Moon will be executing a slow slide past the enormous Sun. ... And anyone living in southern North America, Central America, northern South America, or on islands and cruise ships in the Caribbean Sea will, weather permitting, have the opportunity to experience the wonder of a solar eclipse. ...

. M23 is a rich open cluster compressed into an area that appears as large as the Full Moon. Researchers from Luther College found 30 variable stars in the M23 field. Two of the 30 are contact binaries. Such a discovery can help astronomers find the minimum time it takes for contact systems to form from more widely separated stars. N.A.Sharp, REU program / NOAO / AURA / NSF

John Butler's Retirement Presentation . 2006 February 1st . ... big . ... Dr John Butler, Research Astronomer at the Armagh Observatory for over 30 years, has recently retired. At a formal presentation to mark John's retirement on 2006 February 1, Professor Mark Bailey (Director of Armagh Observatory) spoke to a large gathering about John's many contributions to Astronomy, the Armagh Observatory, and the social scene in the City of Armagh. ... Last Revised: 2006 February 6th . ...

Function: DYDX Purpose: Determine derivative of a mathematical expression. Category: MATH File: dydx .src Author: J.P. Terlouw Use: INTEGER DYDX ( INEXPR , Input character VARIABLE , Input character OUTEXPR, Output character DERIVATIVE , Output character CONSTANTS , Output character array MAXCONST, Input integer NUMCONST ) Output integer DYDX status return code: 0 success -1 syntax error -2 syntax error -3 unknown function -4 function too large for output ...

O beron ("OH buh ron") is the outermost of Uranus 's known satellites and second largest: orbit : 583,420 km from Uranus diameter : 1523 km mass : 3.03e21 kg O beron is the King of the Fairies and husband of Titania in Shakespeare's Midsummer-Night's Dream . ... O beron and Umbriel appear quite similar though Oberon is 35% larger. ... O beron's heavily cratered surface has probably been stable since its formation. It has far more and larger craters than do Ariel and Titania . ... from APOD . ...

Next: Online Reduction Up: IRAC2 Online and Previous: IRAC2 Online and . In many ways, IR array data is similar to that taken with optical CCDs; however, there are a number of important differences that are mainly due to the large, variable sky and instrumental backgrounds that arise at these longer wavelengths. ... The IRAC2 context in MIDAS includes a number of commands that are most useful at the telescope. ... The IRAC2 context can be activated by the command SET/CONTEXT IRAC2 . ...

ChangeLog for rgsrmfgen =============================== Version 0.50.2 - 2002-02-12 ( JDR ) -------------- - task description updated with correct default for the --ebins parameter Version 0.50.1 - 2002-01-17 ( JDR ) -------------- - supports arbitrary energy selection regions - bug fix: does not rely on implicit initialization of global variables Version 0.50 - 2002-01-16 ( JDR ) ------------ - changed default to --ebins=4000 Version 0.49 - 2001-10-10 ( ...

... 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) ...

XXVIII General Assembly of the IAU, SPS15 Beijing, August 31, 2012 . N.N. Samus, S.V. Antipin "Variable Stars and Data-Intensive Astronomy" . During the 26th IAU General Assembly in Prague, the IAU Division V (Commissions 27 and 42) considered the future of variable-star catalogues. ... To discuss these problems and to look for their solutions, the IAU Commission 27, on behalf of the IAU Division V, created an informal working group, chaired by the GCVS editor, Dr. Nikolai Samus. ...