Astronomy Picture of the Day . Star Factory Messier 17 . ... 10.08.2007 . ... Credit: Ignacio de la Cueva Torregrosa Explanation: Sculpted by stellar winds and radiation, the star factory known as Messier 17 lies some 5,500 light-years away in the nebula-rich constellation Sagittarius . ... M17 is also known as the Omega Nebula or the Swan Nebula. ... Publications with keywords: star formation - M17 - Omega nebula . Publications with words: star formation - M17 - Omega nebula . ...

... 2007 August 10 . Star Factory Messier 17 . ... Explanation: Sculpted by stellar winds and radiation, the star factory known as Messier 17 lies some 5,500 light-years away in the nebula-rich constellation Sagittarius . ... Stellar winds and energetic light from hot, massive stars formed from M17's stock of cosmic gas and dust have slowly carved away at the remaining interstellar material producing the cavernous appearance and undulating shapes. ... About APOD | ...

... 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) . ...

... August 28, 1998 . Hydrogen Trifid . ... Explanation: Clouds of glowing hydrogen gas mingle with dark dust lanes in the Trifid Nebula , a star forming region in the constellation Sagittarius. In this and other similar emission nebulae , energetic ultraviolet light from an embedded hot young star strips electrons from the surrounding hydrogen atoms . ... It shows those regions with substantial emission from atomic hydrogen . ... Tomorrow's picture: Star Colors . ... About APOD > . ...

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 Unit Telescopes Overview - This page is outdated, an update is in process.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 Secondary mirror (M2 Unit) - This page is outdated, an update is in process.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 Coating Unit - This page is outdated, an update is in process.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

home publications > mercury . SEARCH ASP SITE: Match ALL words Match ANY word . ... Purchase through the AstroShop . ... Publications of the ASP (PASP) . ... Astronomy Beat . ... Lighting the Nebulae . ... The interplay of light and atoms paints the beautiful palette of planetary nebulae. ... So come along on a trip to the inside of a planetary nebula and see what really happens as light and atoms violently interact to create some of the loveliest objects in the night sky. home | ... astroshop | ...

Astronotes Armagh Planetarium's Stellar Blog! ... Planets . ... Exoplanets . ... Space Flight . ... Science Fiction . ... August . ... By admin August 18, 2011 Posted in: August . Artist's impressions of Kepler and the light curve of transiting planet (Image credit: NASA) . ... In 1995 we knew of only nine planets (including Pluto, how times change), but in that year the first of the extra-solar planets or exoplanets was confirmed. ... Another is one of the most Earth-like worlds yet discovered . ...

... 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) ...

Photon Scattering: Basic Principle of Photon Scattering . Audio Narration is available . No Scattering: Photon Source and Detector . ... For optical photons, scattering goes as wavelength to the -4 power. In the case of blue photons compared to red photons, this means that blue photons are about 10 times more likely to get scattered than red photons. ... Watch the blue photons scatter away from the detector . ... Interstellar dust make stars appear redder than they really are . ...

... March 23 - Images from the Hubble Space Telescope reveal the explosive birth of stars in a distant galaxy. ... THE GALAXY NGC 1808 is in the direction of the southern constellation Columba, about 40 million light-years away from Earth. ... Mutchler said those supernovae eject dust that shows up as streaming filaments in high-resolution images of NGC 1808. ... Mutchler said the shape of the galaxy may have been altered by the gravitational pull of another galaxy passing nearby; perhaps NGC 1792. ...

Galactic Wind Shells and High Redshift Radio Galaxies . ... M.Krause . Astronomy & Astrophysics, v.436, 845-851 . Very Light Jets II: Bipolar large scale simulation