... Credit: Galileo Project , JPL , NASA Explanation: The Moon's surface is covered with craters, scars of frequent impacts during the early history of the solar system. ... The impact theory of lunar origin can explain, for example, why Moon rocks returned by the Apollo missions have the same isotopic ratios as Earth rocks while the Moon seems deficient in heavy elements like iron. ... Publications with keywords: Moon - origin - impact theory - impact - crater . ... Apollo 17: Shorty Crater Panorama . ...

An Ancient Universe: How Astronomers Know the Vast Scale of Cosmic Time . ... d) The Age of the Chemical Elements . ... Some isotopes (forms of the element with different numbers of neutrons in the nucleus) of these elements are radioactive; they change into other isotopes at a rate that can be measured accurately in the laboratory. ... The Ancient Universe - The Age of the Expanding Universe - The Age of the Oldest Stars - The Age of Light From Distant Galaxies - The Age of the Chemical Elements | ...

... Plastic forming and welding of optical elements for laser technologies and optical telecommunications. A set of technological processes of manufacturing of optical elements with sophisticated profiles for laser technologies and optical telecommunications has been developed in the Institute of Solid State Physics . ... тАв€а to form optical surfaces with non-spherical and rather sophisticated profiles, improving essentially effectiveness of laser technologies and optical telecommunications; . ...

... 2003 August 11 . Elements of the Swan Nebula . ... Explanation: In the depths of the dark clouds of dust and molecular gas known as M17 , stars continue to form. Also known as the Omega Nebula and Horseshoe Nebula, the darkness of M17's molecular clouds results from background starlight being absorbed by thick filaments of carbon-based smoke-sized dust . As bright massive stars form, they produce intense and energetic light that slowly boils away the dark shroud. ... About APOD | ...

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... Content Model: one ore more OPTION elements . The SELECT element is used for single and multiple choice menus. ... Example: <SELECT NAME="flavor"> <OPTION>Vanilla <OPTION>Strawberry <OPTION>Rum and Raisin <OPTION>Peach and Orange </SELECT> . ... When you want a multiple choice menu, you need to include the MULTIPLE attribute with the SELECT element, e.g. <SELECT MULTIPLE NAME="flavor"> . ... NAME . ... The presence of this attribute denotes that the SELECT element defines a multiple choice menu. ...

... June 25, 1996 . A Star Forming Region in the LMC . ... Explanation: Stars sometimes form in colorful ways. Pictured above is a small region in the nearby LMC galaxy where stars are forming. ... It may develop a strong wind which pushes away nearby gas ; it may be so hot and intense that emitted light boils away nearby dust and gas , and it may be so massive that it soon goes supernova and catapults its elements back to the interstellar medium . ... About APOD | ... Specific rights apply. ...

An international group of astronomers, including Dr Simon Jeffery of the Armagh Observatory, has used the Hubble Space Telescope to verify the origin of a very unusual and rare type of star. The group's studies confirm that the so-called "extreme helium stars" are formed by the merger of two white dwarf stars. ... One, dubbed the final-flash (FF) model, suggests an outer helium layer of a cooling white dwarf ignites, producing an extra thermal pulse that balloons the star into a giant. ...

. На главную страницу НМУ . Определение, геометрическое и теоретико-представленческое обоснование. Структура поля модулярных функций и кольца модулярных форм. Скалярное произведение Петерсона соответствия Гекке. Периоды и L-функции.

User name: . ... Blues . ... Choose a Category of Room: Living . ... First name: . Last name: . Brief description of the problem: . Please attach a file with your event log. File name: . ... Music types for your free CDs: R Jazz Blues Folk Country . Choose a fruit: Apples Bananas Cherries Oranges Pineapple Figs Guava . ... Describe your problem here: For faster response, include a full description of your problem, and tell us what hardware configuration you are using. ...

... PmWiki .Forms$:Audience} . ... An optional name="FormName" argument can be used to name the form. ... input text name value size= n :) (:input hidden name value :) (:input password name value :) (:input radio name value :) (:input checkbox name value :) (:input select name value label :) (:input default default-name default-value :) (:input submit name value :) (:input textarea name [=value=] rows= n cols= n :) (:input reset name label :) (:input file name label :) (:input image name "src" alt :) . ...

OptInt PmWiki : Pm Wiki / Forms . ... Forms processing can be found in the Cookbook (see below). ... input text name value size= n :) (:input hidden name value :) (:input password name value :) (:input radio name value :) (:input checkbox name value :) (:input select name value label :) (:input default default-name default-value :) (:input submit name value :) (:input textarea name [=value=] rows= n cols= n :) (:input reset name label :) (:input file name label :) (:input image name "src" alt :) . ...

This document explains values, tables and other matters on solar physics computing pages. ... is040423.ete : SAHA-S tables, interpolation values: T, rho, X. Z is fixed at 0.02. See reference above. opal2005.etf : OPAL EOS, interpolation values: T, rho, X, Z. Downloaded from OPAL site , marked there as "2005", seems to be unpublished. opal2001.etf : OPAL EOS, interpolation values: T, rho, X, Z. Rogers F.J., Nayfonov A. Astrophys. ... The following values can be calculated: . ... dimensionless . ...

Astronotes Armagh Planetarium's Stellar Blog! ... Our Galaxy . ... Stars . ... Space Flight . ... A galaxy is born: This artist's impression shows a young galaxy, about two billion years after the Big Bang, accreting material from the surrounding hydrogen and helium gas and forming many young stars. ... Galaxies, distant from us in space and time, have been in the news recently. ... Astronomers at the European Southern Observatory have observed another process which helped primordial galaxies grow. ...

... However, to avoid excessive central obscuration, a conical baffle is necessary in addition to the usual primary and secondary baffles. ... Matthew Weinberger (l, QCI) and Paul Smith (r) carefully add a prepreg section to the baffle being formed on the aluminum mandrel (right image). ... The central stiffening rib and the smaller baffle ribs on the inside of the part have already been formed and cured. ... Different means of forming the inside ribs and the central stiffening rib were examined. ...

... An array of vertical electrodes is formed over the silicon surface and horizontal charge transfer columns are defined by implanted channel stop regions in the wafer surface. ... The array operates as follows: when an image is focussed onto the CCD, photons which penetrate the electrode structure generate electron-hole pairs in the underlying silicon substrate, and the signal charges are stored in the potential wells beneath the electrode structure (gates). ...

... part 1 | ... The Basic Stages in Earth's Pre-geological Development . ... After fragments of the Vortex sleeves separated, whirlwinds of second and third orders ("NC" - new micro-vortex) were generated- future planet cores and their satellites - all of them developing independently, governed by the common laws of development of cosmogenic vortexes. ... Our planet's core today is comprised of considerably deteriorated cosmogenic vortex; consequently, the Earth has a moderated magnetic field. ...

... In laboratory the design and a manufacturing techniques mirror aspherical optics are developed ("fokon", ellipsoid, aspherical mirror).Such optical elements are made of widespread aluminium alloys on the standard equipment without use diamond turning. ... Using: optical blocks of not image optical devices for transitions, collimation, focus (concentration) radiations in a wide spectral range from UV to IR. Focusing and collimation of light; . ... circle aperture/ring aperture; . ... Back Forward . ...

... HST . ... Data . ... HST Overview . Overview . ... Retrieving HST Data . ... This FORM is a quick tool for flux conversion between diverse unit systems. ... INPUT FLUX or MAGNITUDE UNITS CLEAR Jy W/m2/Hz W/m2/um W/cm2/um erg/cm2/s/Hz erg/cm2/s/A photons/m2/w/um photons/cm2/s/A AB magnitude magnitude V magnitude U magnitude B magnitude R magnitude I magnitude J magnitude H magnitude K magnitude L magnitude L1 magnitude M magnitude N magnitude Q . ... Enter the Input Flux or Magnitude Value : . ...

... Tonight's Sky . ... Observing . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Explore how our universe and all the objects it contains form and evolve in Cosmic Origins a must-have app brought to you by the editors of Astronomy , the world s best-selling astronomy magazine. ... Discover the basic galaxy types, how black holes affect the universe and how galaxies and their larger conglomerates т?? galaxy clusters т?? form and evolve through cosmic time. ...