. The movie illustrates the possibilities of the 3-d presentation, when you look at a given measurment frame from different points of view.

... Current APO Weather . ... Search Site . ... Information for New Users . ... Technical Staff pages . Night Logs and Mailing Lists (maintained by APO) . ... Technical Documents and Database Search . ... Observer's Documentation and Procedures . ... Problem Reporting and APO Technical Documents Database Search . ... APO Drawing/Document Management Procedures . ... APO Technical Documents Database Search . Home Astrophysical Research Consortium . ... Mail Lists (maintained by APO) . ...

... Bad Astronomy . Misconceptions . ... Bad Astronomy : The Moon only shows one face to us because it is not rotating. Better astronomy : The Moon only shows one face because it is rotating, once every time it revolves around the Earth. ... Place the Moon model on the table about 30 centimeters (one foot) away with the X facing the Earth model. ... You'll see that to keep the X facing the Earth model, you have to rotate the Moon model as it goes around the Earth model . ... 2008 Phil Plait. ...

... From the chain visibility point of view, it is very recommended to look at the Javascript movies , especially if the frame rate can be not regulated in your MPEG player. ... The non-CH-associated large-scale chains visible on the SOHO/EIT images at three wavelengths of 171, 195 and 284 as well as on the MLSO/HAO He I 10830 spectroheliogram of December 16, 1997. ... The SOHO/EIT movies at 171 and 195 show the chain dynamics on June 1-3, 1998. ... Javascript movie (230 KB), SOHO/EIT, 171 . ...

This is the homepage of Andrew Fruchter, an astronomer on the staff of the Space Telescope Science Institute . ... Here you can look at an HST images of the optical counterparts of gamma-ray bursts and their host galaxies. ... Therefore, substantial information on the fine scale structure of objects can be obtained by offsetting the pointing of the telescope between exposures and then combining these "dithered" exposures into a single image. ...

Calibration data from jun12 through dec12 was used to look at the system performance and pointing errors of various receivers. 06jun12 - model 18 installed. ... Prior to this, little power was getting into polB. 430 dome data used was after 19oct12. 28oct12: new sbn receiver installed . ... they had an exceptionally large pointing error for this receiver (say > 60 asecs) . ... The offsets for the other receivers are then computed relative to sbn using 2 or 4 sources.This was done back in apr-may12. ...

... Single and Multi-dimensional Arrays . Strings . ... BEWARE: In C Array subscripts start at 0 and end one less than the array size. ... In C Strings are defined as arrays of characters. ... char name[50]; C has no string handling facilities built in and so the following are all illegal : . ... In order to allow variable length strings the 0 character is used to indicate the end of a string. ... Write a C program to read through an array of any type. ...

... 2000 December 22 . Simulated Supergiant Star . ... Consider this "star in a box". Of course, the box is actually a computational box consisting of a three dimensional grid of points, and the star is a virtual one whose physical properties and internal dynamics are numerically simulated at the points on the grid. ... This picture is a movie frame from a recent numerical simulation of a supergiant star with properties intended to approximate the real star Betelgeuse . ... About APOD | ...

... A High School Curriculum in Astrobiology . ... It was the focus of the ASP science symposium this summer; the University of Washington is offering it as a new Ph.D. program, and TERC (Technical Education Research Center) is developing a high school integrated science course based on it. ... Apparently, as soon as Earth was mature enough for life to form here, it did. ... One may be tempted to rule out various places in our Solar System as sites that harbor life because of their extreme conditions. ...

... Credit Copyright: Applied Optics Group ( Imperial College ), Herschel 4.2-m Telescope Explanation: This is what a star really looks like from the surface of the Earth. ... Because the atmosphere is always windy and changing, the number and position of images is always changing, with the result that stars appear to twinkle . ... Betelgeuse is the star twinkling above, and in space, above the Earth's atmosphere, it really looks like this . ... Publications with keywords: Betelgeuse - speckles - star ....

... Light sources: POV-Ray works with point sources of light. ... A real star consists of a spherical light source (the photosphere where the continuum is formed) superimposed by a scattering layer (an atmosphere) responsible for phenomena such as limb darkening and absorption lines. ... For example, in order for the central light source to illuminate the surface, the star must be transparent. ... The POVRay source for creating the white dwarf binary merger movie is given for demonstration purposes. ...

Next: Context Levels Up: MIDAS Command Language Previous: Interrupting Procedures . ... In MIDAS, the ENTRY command defines entry points for different procedures in the same file. These individual procedures are executed by specifying also their entry point besides the file name in the `@@' command. ... DEFINE/PARAM P1 11 NUMBER "Enter input number: " . DEFINE/MAXPAR 1 ! only one parameter expected . ... DEFINE/PARAM P1 spiral IMA "Enter input image: " . ... DEFINE/LOCAL LOOP/I/1/1 0 . ...

... R. T llmann's talk at the 10 years of Chandra meeting, 2009 Boston; (PDF) . K. Long's presentation at the SNR workshop in Cambridge, 2009 Cambrige, MA; (PPT) . B. William's presentation for the galaxies meeting 2007 in Spain; (PPT, 371MB!) NGC604 Poster from R. T llmann for the AAS meeting 2007: gzipped PDF . ... M33SNR21 Poster from T. Gaetz for the AAS meeting 2007: PDF . ... T. Pannuti's presentation for the AAS meeting 2005, (PPT) and in PDF format. ...

... Tonight's Sky . ... Sky this Month . ... Star Atlas . ... stars . ... The Sky This Week: April 1 - 10 . ... Observing springtime deep-sky objects with a large telescope . ... Why do some stars appear to flash a variety of different colors when you look at them through a telescope? ... So, Earthт??s atmosphere will bend some colors from especially bright stars more so than others, which makes the source look like itт??s flashing colors. Get instant access to subscriber content on Astronomy.com! ...

GROUPS OF ALGEBRAIC TRANSFORMATIONS OF AFFINE VARIETIES FINAL REPORT FOR THE THREE YEARS KARINE KUYUMZHIYAN 1. ... The latter is an algebraic variety with the given field of rational functions and an infinitely transitive regular action of a group of algebraic automorphisms generated by unipotent algebraic subgroups. ... Quotient groups. ... Since over R there exist irreducible non-connected varieties, we cannot have even one-transitivity of any connected group of automorphisms. ...

... ksnow and ktrek are simple programs to visualise points whose coordinates are in a table. ... With ktrek you can fly through these data points. ... The optional switch -bg sets the background colour of the display window, otherwise it will have the default window background colour. ... Loading the table takes some time because ksnow and ktrek scale the data. Depth . ksnow and ktrek draw the points on the screen using a perspective projection. ... Update can be used to update the display. ...

... 295, 2003 H. E. Payne, R. I. Jedrzejewski, and R. N. Hook, eds. The MAST Pointings Tables Pro ject Karen Levay, Paolo Padovani1 , Randall Thompson, Megan Donahue, Michael Corbin Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 Abstract. We have undertaken a pro ject to create a database of all HST imaging observations organized by position on the sky. ... Each sky region was called a "pointing." ... Users select the instrument pointings table they wish to search. ...

... ESO, the European Southern Observatory . ... Star Clusters . ... Stars@ESO . ... Some months ago, the ESO Very Large Telescope (VLT) observed a classical dark globule, Barnard 68 (B68) , in front of a dense star field in the Milky Way band. ... Answers to some of these basic questions are now being provided by new and unique observations in the infrared part of the spectrum with the SOFI multi-mode instrument at the ESO 3.5-m New Technology Telescope (NTT) at La Silla. ... Secrets of a Dark Cloud . ...

... CONDENSED MATTER PHYSICS SUPPLEMENTARY PROGRAM . ... Relationship between symmetry of crystal structure, point symmetry and symmetry of physical properties of crystals. ... Crystal lattice energy, Structural types. ... Typical structures of metal and semiconductor phases. ... Wave diffraction in crystals and basic methods of investigation of crystal structures, their principles, potentialities and specifics. ... Crystal optics. ... Principal methods of investigation phase transitions in solids. ...

Next: The Scenario Machine: Operational Up: Evolution of Magnetic Rotators Previous: Ejector-propeller hysteresis . ... The length of this segment is determined by the eccentricity. ... In this case no hysteresis occurs and transitions E -- P and the reverse take place in symmetrical points of the orbit. ... Here EP means a mixed state of the rotator at which it is in the ejector state during one part of the orbit, and in the propeller state during the rest of the orbital cycle. ...