... 2000 February 26 . Impact: 65 Million Years Ago . ... Their sudden disappearance 65 million years ago, along with about 70 percent of all species then living on Earth, is known as the K-T event (Cretaceous-Tertiary Mass Extinction event). ... Regardless of the true cause of the K-T event, it is fortunate that such impacts are presently believed to happen only about once every 100 million years! ... About APOD | ...

Next: Results and Discussion Up: Evolution of Supernova Explosion Previous: - Dependence for the . In order to construct the - dependence for supernova explosions, we calculated separately the m ( z ) in the R band and N ( z ) taking the cosmological and evolutionary effects into account. ... where n(t) is the SN rate as a function of age of the galaxy, t(z) is the age of the galaxy as a function of its redshift, and is the density of galaxies in the Universe. ...

... Up: Science Data Pipelines . ... Jenness, T., Archibald, E. N., Economou, F., Jessop, N., Robson, E. I., Tilanus, R. P. J., & Holland, W. S. 2001, in ASP Conf. ... Tim Jenness . ... This paper describes the automated calibration and reduction scheme used to process the archive data with particular emphasis on the pointing observations. This is made possible by using the ORAC-DR data reduction pipeline, a flexible and extensible data reduction pipeline that is used on UKIRT and the JCMT. ...

... PALMA Numbers 1 to 11 Observations of positions of stars and planets May 1984 to May 1998 including Extinction and Meteorological data Copenhagen University Observatory Royal Greenwich Observatory Real Instituto y Observatorio de la Armada en San Fernando 1999 http://www.ast.cam.ac.uk/~dwe/SRF/cmc1-11/readme.txt Informations ... Hour of right ascension (alpha, h) 4. Minute of right ascension (alpha, m) 5. Second of right ascension (alpha, s) 6. Degree of declination (delta, deg) 7. ...

Your browser does not support script . Please send comments or suggestions to: gabrelle at apo . ARC 3.5m | Extinction data . [If you see this text, your browser doesn't support iframes. Click here to view it separately.] .

. A large body of scientific evidence now exists in support of the idea that a major asteroid or comet impact occurred 65 million years ago and led to the extinction of 75 percent of life on Earth, including the dinosaurs. Don Davis / NASA

A1459 2000-Jun-01 17:26:55 Technical Page Proposal Type: Large General Category: Astronomy Sub-Category: Spectroscopy Observation Category: Extragalactic Total Time Requested: 325 Hours Proposal Title: 2MASS Galaxies in the Zone of Avoidance ABSTRACT: The 2-Micron All Sky Survey (2MASS) has now nearly completed observations of the whole sky. ... These observations are complementary to other HI and optical redshifts being collected to form a complete sample of 2MASS galaxies to K=12.0. ...

Subject, Problems and Objects of Theoretical Astrophysics. ... Stellar Photospheres, Their Features. ... Physics of Continuous Radiation Absorption in Stellar Photospheres. ... Continuous Radiation Absorption in Stellar Photospheres of Various Spectral Classes. Solar Type Photospheres. ... Characterisics of Absorption Lines. ... Interstellar Absorption Lines, Their Features. ... Physical and Dynamic Features of Interstellar Medium, Which Follows from Observations of Interstellar Absorption Lines. ...

A team of scientists believes they have discovered a chain of impact craters in the central African country of Chad that suggests ancient Earth may have been hit by a large, fragmented comet or asteroid similar to the Shoemaker-Levy 9 comet that slammed into Jupiter in 1994. The craters were discovered in radar images of the Earth taken by the Spaceborne Imaging Radar C/X-band Synthetic Aperture Radar (SIR-C/X-SAR) that flew on the Space Shuttle Endeavour in April and October of 1994. ...

. Parent Directory . countdown.to.extinction . killing.is.my.business . looking_down_the_cross . loved_to_deth . mechanix . peace.sells.but.whos.buying . rust.in.peace . skull_beneath_the_skin . so.far.so.good.so.what . youthanasia

... Automated Spectral Classification Using Neural Networks E. F. Vieira Laboratorio de AstrofТРsica Espacial y FТРsica Fundamental P.O.Box 50727, 28080 Madrid, Spain, Email: efv@lae#.esa.es J. D. Ponz GSED/ESA, Villafranca P.O.Box 50727, 28080 Madrid, Spain, Email: jdp@vilspa.esa.es Abstract. We have explored two automated classification methods: supervised classification using Artificial Neural Networks (ANN) and unн supervised classification using Self Organized Maps (SOM). ...

... Milloins of years timescale . ... 500 million years ago (unclear) . ... Evidence from Fossil Record: 100-150 million year extinction periodicity ?? ... Climate Cycle ? ... Since the orbital period of the Sun around the center of the Galaxy is about 250 million years then every 100-150 million years the earth is in a spiral arm which is a region of high supernova density. ... Somewhere between 700 and 800 million years ago there was a 10 million year long period where the oceans were completely...

Astronotes Armagh Planetarium's Stellar Blog! ... Comets and Asteroids . ... Earth Satellites . ... Thankfully, throughout the human species? life span falling asteroids or large impacts have not killed anyone. However, around 65 million years ago an asteroid or comet about 10km (6 miles) wide caused global extinction for around 70% of all life when it crashed into the Earth. ... It makes sense now to link the Chicxulub impact crater with a large asteroid that impacted 65 million years ago. ...

... Fig. 1a,b. Location of slit spectrograms on the HА-line image of IC10. ... Relative abun dances Relative abundances of oxygen are derived using three methods. ... Figures 2, 3, 4 show the distributions of the inferred 12+log(O/H), log(N/O), log(S/O) values along the slits; we averaged the abundances over HII re gions from the catalog of Hodge and Lee [5]. ... Relative oxygen abundance along the slits. ... Relative nitrogen abundance along the slits. ... Relative sulf ur abundance along the slits. ...

... About meteorites . ... Meteoritic data . Impact Crater Smerdyachee . ... Based on Smerdyachee's depth, near circularity, and its mounded wall, and analysis by N.A. Fillin of nearby Roshal, Russia, the Estonian scientists Yu.V. Krestlane and K.H. Mella proposed in 1987 that Smerdyachee Lake is a meteorite crater. ... In 2002, the Laboratory of Meteoritics of the Vernadsky Institute of Geochemistry and Analytical Chemistry of the Russian Academy of Sciences explored this mysterious lake. ...

... Ozone depletion . ... The greenhouse effect . ... Eco-glossary . Словарь . ECO-GLOSSARY . ... Greenhouse effect . ... Species . ... nuclear power stations . ... industrial and nuclear waste . ... on the brink of extinction . ... extinction . ... Endangered Species List . ... Endangered species . ...

Data Flow System IR Camera Calibrating VISTA Data Astronomy Unit Queen Mary University of London Jim Emerson Simon Hodgkin, Peter Bunclark, Mike Irwin, Jim Lewis Cambridge Astronomical Survey Unit , Institute of Astronomy , Cambridge The United Kingdom Astronomy Technology Centre on the site of the Royal Observatory Edinburgh VISTA Data Flow Transfer function (image in, DN out) of end-to-end system so that instrumental effects can be removed from the data. ... VISTA?? ...

Supernova 2002bx in IC 2461 . This page is devoted to information on Supernova 2002bx in IC 2461 Basic information on this SN, including the last reported brightness, on this Supernova can be found on the main page . ... This is found to be a type II supernova on the rise in an edge on galaxy. ... Mag . ... 2002/04/01.2 . ... 16.4 . ... Rafael Ferrando image . ... vsnet-campaign-sn 397] SN 2002bx in IC 2461 . ... The host galaxy of SN 2002bx is IC 2461, a somewhat nearby edge-on spiral galaxy. ...

Galactic coordinate system based on multi-wavelength catalogues Ping-Jie Ding, Jia-Cheng Liu, and Zi Zhu School of Astronomy and Space Science, Nanjing University, China Outline Introduction: why we need to establish a new Galactic Coordinate System ( GalCS ) Data and methods used to find a proper GalCS Results and conclusion Discussion 2 Introduction: why we need to establish a new GalCS The Galactic coordinate ... 3 The GalCS is defined by three parameters p , p and . ...

Цикл работ на конкурс статей . ... В заключительной работе цикла ( The Afterglows of Swift - era Gamma - ray Bursts . ... Atteia, J.-L. ; Klotz, A. ; Basa, S. ; Gendre, B. ; Verrecchia, F. ; Bo r, M. ; Cutini, S. ; Henze, M. ; Holland, S. ; Ibrahimov, M. ; Ienna, F. ; Khamitov, I. ; Klose, S. ; Rumyantsev, V. ; Biryukov, V. ; Sharapov, D. ; Vachier, F. ; Arnouts, S. ; Perley, D. A. A multiwavelength study of Swift GRB 060111B constraining the origin of its prompt optical emission . ...