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Astronotes Armagh Planetarium's Stellar Blog! ... Space Flight . ... Posted on January 13, 2012 | No Comments The aurora is a stunning celestial event associated with EarthтАЩs polar regions. ... Continue Reading.. Posted on October 20, 2011 | ... Posted on September 26, 2011 | ... Posted on July 19, 2011 | ... Posted on May 27, 2011 | ... Time was originally defined and quantified through astronomy, and today astronomers are used to glibly talking of vast stretches of time. ...

... 2006 May 11 . Comet Meets Ring Nebula: Part I . ... Explanation: As dawn approached on May 8, astronomer Stefan Seip carefully watched Fragment C of broken comet 73P/Schwassmann-Wachmann 3 approach M57 - the Ring Nebula, and faint spiral galaxy IC 1296 . ... At a distance of 200 million light-years, IC 1296 (between comet and ring) is beyond even the Milky Way's boundaries. ... Tomorrow's picture: part II . ... About APOD | ... NASA Web Site Statements, Warnings, and Disclaimers . ...

Orbital intersection . ... Structure of Taurid stream . ... Meteoroid swarm and Taurid fireballs . ... The following four diagrams schematically show four different Taurid orbits and the orbits of Earth and Jupiter. ... The Taurid stream contains particles (small, solid grains) at different stages of their precession cycles. ... The study of when a meteor stream can produce a meteor shower is the study of when precession brings orbits to intersection with Earth, or e.g. with Mars . ...

. Album : asv-album :: Travels to distant places and countries :: 1997/08 Kyoto, Nara (Japan) :: 23/08 Ryoanji Temple and around . Up . << Prev . Kyoto city, as viewed from the hill. Central part of the panorama. Next >> . Created with the tool photo album generator a MarginalHack by David Madison on Tue Jun 23 14:46:19 2015 .

... December 29, 1997 . The Milky Way in Infrared . Credit: The COBE Project , DIRBE , NASA . ... Until the invention of the telescope , nobody really knew what the "Milky Way" was. About 300 years ago telescopes caused a startling revelation: the Milky Way was made of stars . Only 70 years ago, more powerful telescopes brought the further revelation that the Milky Way is only one galaxy among many. Now telescopes in space allow yet deeper understanding. ... About APOD > . ...

... The task first computes a background image in order to identify pixels that may be part of a source. The task uses two different algorithms for detecting ``point'' and ``extended'' sources. ... If a likely source is found its position and shape parameters are computed by moments and the pixels assigned to the source are set equal to the source number. ... The source is again classified as either ``point'' or ``extended'' from a comparison of its with to that of the PSF width. ...

We present Spitzer observations of the nearby dwarf starburst galaxy NGC 1705 obtained as part of the Spitzer Infrared Nearby Galaxies Survey. ... The nebular metallicity of NGC 1705 falls at the transition level of ~0.35 Zsolar found by Engelbracht and collaborators, below which PAH emission is difficult to detect; the fact that a system at this metallicity shows spatially variable PAH emission demonstrates the complexity of interpreting diffuse 8 О?m emission in galaxies. ...

... 25.09.2009 . ... Credit: St phane Guisard Explanation: From Sagittarius to Scorpius , the central Milky Way is a truly beautiful part of planet Earth's night sky. ... Part of ESO's Gigagalaxy Zoom Project , the images were collected over 29 nights with a small telescope under the exceptionally clear, dark skies of the ESO Paranal Observatory in Chile. ... Publications with keywords: Milky Way - Galactic Center . Publications with words: Milky Way - Galactic Center . ... Microwave Milky Way . ...

... To provide a detailed comparison between the performances of the MOPRA and SEST telescopes at frequencies of 85-113 GHz we have repeated part of the spectral survey of molecular absorption lines which was carried out by Greaves Nyman (1996) with the SEST 15-m telescope using SgrB2 as background source. ... 1-6 June and 15-19 August 1997, BW = 128 MHz, 256 channels, position switching . ... SEST Spectra . ... C 3 H 2 (2-1) . ... on-off . ... HCN(1-0) . ... USB . ... June 1, 1997: gtp_log , tsys_log ....

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... Archives . ... Poisson vs Gaussian . ... Probability density functions are another way of summarizing the consequences of assuming a Gaussian error distribution when the true distribution is Poisson. We can compute the posterior probability of the intensity of a source , when some number of counts are observed in a source region, and the background is