... A comparison of the computed and experimental relations F max ( H), as well as comparison of drift scans of point sources across different horizontal cross-sections of the BP with the corresponding computed cross-sections were made. ... The drift scans of the point source 3С84 (H=87 o ) at the wavelength 7.6 cm across the horizontal cross-sections of the BP (black lines) and the computed horizontal cross-sections of the BP corresponding to them (red lines). ...

... Explanation: An explosion so powerful it was seen clear across the visible universe was recorded in gamma-radiation last week by NASA's orbiting Swift Observatory . Farther than any known galaxy , quasar , or optical supernova , the gamma-ray burst recorded last week was clocked at redshift 8.2, making it the farthest explosion of any type yet detected . ... Publications with keywords: gamma-ray burst - redshift - early universe . ... Building Galaxies in the Early Universe . ...

... HST Phase II Proposal Instructions for Cycle 20 > Chapter 10: Fine Guidance Sensors (FGS) > 10.3 Mode = TRANSConfig = FGS . ... This observing strategy is discussed in the FGS Instrument Handbook . ... STEP-SIZE values of 0.6 or 1.0 are recommended (see the FGS Instrument Handbook ). ... Enter the ORIENT ation visit-level Special Requirement (see ORIENTation <angle1> TO <angle2> ) if the arrangement of the target or reference stars requires a particular orientation of the FGS field of view. ...

... 2009 April 29 . GRB 090423: The Farthest Explosion Yet Measured . ... Explanation: An explosion so powerful it was seen clear across the visible universe was recorded in gamma-radiation last week by NASA's orbiting Swift Observatory . ... Surely, GRB 090423 provides unique data from a relatively unexplored epoch in our universe and a distant beacon from which the intervening universe can be studied. ... About APOD | ... NASA Official: Phillip Newman Specific rights apply . ...

The apparent path of the Sun across the sky. ... The path of the Sun across the celestial sphere is very close to that of the planets and the moon. ... In one year, as the Earth completes a full circuit around the Sun (drawing above), the Earth-Sun line and its continuation past Earth sweep the entire plane. ... Since the Sun and Earth are in the plane of the ecliptic, the line is automatically in that plane too; if the moon is also on the same line, it must be in the plane of the ecliptic as well. ...

The Telescope:Pointing Data script takes set of pointing error measurements of pointing reference stars across the sky. ... To retry measuring the star, fix the problem (e.g. by adjusting focus, exposure time or offset) and press Continue . ... For each point in the az/alt grid the script will find and slew to a nearby pointing reference star, measure the star, write the pointing error to a data file whose path is displayed, and correct the pointing error. ...

... Sighting the telescope, first at the tree and then at pole B, you measure the angle A of the triangle ABC, equal to the difference between the numbers you have read from the azimuth plate.. ... Why triangles? ... One large surveying project of the 1800s was the " Great Trigonometric Survey " of British India. ... Everest was the one who commisioned and first used those giant theodolites; they are now on display in the Museum of the Survey of India in Dehra Dum. ... Everest . ...

... Armagh Planetarium . ... Universe . ... Posted on March 13, 2015 | No Comments In association with BBC Stargazing Live 2015 and the Northern Ireland Amateur Astronomical Society (NIAAS) Armagh Planetarium is opening its doors for a free open evening on Tuesday 24th of [ ] . Continue Reading.. ... 2 Comments At the planetarium it is often stated that every time you look into the sky you are doing astronomy, it has become a slight mantra that we chant to encourage [ ] . ... Newer Entries . ...

... STScI-PRC00-35 THE MOTION OF RX J185635-3754 -- THE NEAREST NEUTRON STAR TO EARTH This photograph is the sum of three Hubble Space Telescope images. North is down, east is to the right. The image, taken by the Wide Field and Planetary Camera 2, is 8.8 seconds of arc across (west to east), and 6.6 seconds of arc top-to-bottom (south to north). ... All stars line up in this composite picture, except the neutron star, which moves across the image in a direction 10 degrees south of east. ...

... Archaeoastronomers measure four important angles (see figure 3 and figure 4 ): . ... Because this angle does not change as the Earth rotates, astronomers use it to describe the positions of stars. ... For the North Star, the elevation equals the geographic latitude. ... Azimuth, the angle between north and the star (angle A in figure 4 ), measured along the observer's horizon. ... Astronomers are always using these angles to determine where to find a particular star at a particular time of year. ...

... This year's eclipse is unique in duration. ... Although, at the present time, there are 6 solar observatories belonging to leading space agencies in orbit around the Earth, the eclipse of 22 July, 2009, will only be seen by two of them: the Russian CORONAS-PHOTON satellite equipped with TESIS telescopes and Japan's HINODE satellite fitted with an XRT space telescope. ... TESIS will be the first of the two devices (and the very first on Earth) to witness the solar eclipse. ...

... Bad Astronomy . ... Mad Science . ... Please explain what the fourth dimension is and how it can be visualized. ... I never found any really good books describing it, although there is one fun one called "The Fourth Dimension Simply Explained". ... The fourth dimension would be if you could draw a line perpendicular to all three lines. ... If you could move in the fourth dimension, you could go straight out from the center of the sphere, receding forever, but never actually touch the surface. ...

The azimuth encoder rack gear is mounted on the inside of the azimuth ring girder. The azimuth encoder turns on this gear as the azimuth moves 0 to 720 degrees. ... The software assumes that this arc length along the encoder rack gear is correct (at a constant radius of 127/2 feet). The error in the radius of the rack gear becomes an azimuth error. To measure the error in the azimuth encoder rack gear, jon hagen built a proximity sensor. ... To compute the az encoder runout error: . ...

... Big telescopes are very powerful and zoom in on objects in the Universe that can t be seen using just our eyes or small telescopes. But if astronomers want to photograph large areas of the sky, then they usually use small telescopes instead. Astronomers often talk about the size of the area captured in a space photo by how much room the objects in it take up in the night sky. ... Most big telescopes can only capture an area of the night sky that is much smaller than 1 degree wide. ...

... It will be visible in Ireland as an 'evening star' in the first 3 weeks of June, better seen the further South you are. ... Saturn has just entered the Southern edge of the cluster, and will pass across that edge over the next 5 days. ... On 6 June it will be only 5 degrees from the cluster and on the evening of 14 June it will have reached its W edge. ... Next evening it will be just off the E edge of the cluster. ... Next evening it will have moved about a degree closer to Saturn. ...

... Variations in water level along coastlines can be used to drive turbines technology is the same as low-head hydro power . ... Intermittent tidal flow is major problem. Tidal facility produces about 1/3 the electrical energy of a hydro facility of the same peak capacity . Two tidal plants in the world: . ... Bottom Line: There aren't many favorable sites in the world for tidal power and the estimated capacity is 50 times smaller than the world's hydroelectric power capacity. ...

. Bishop School . Gallery of Activities . in Action .

... casa . ... const Double . ... the minimum single precision floating point number, including denormalised numbers . ... the maximum double precision floating point number . ... Minimum double precision floating point number X such that 1+X does not equal X. const Double . ... Minimum double precision floating point number X such that 1+X does not equal X. const Double casa::C::dbl_max . ... Minimum single precision floating point number X such that 1+X does not equal X. const Double casa::C::flt_max ...

... 50 Greatest Mysteries . ... Hubble shows Jupiterт??s Great Red Spot is smaller than ever measured . ... GREAT RED SPOT . Jupiter s trademark Great Red Spot a swirling anti-cyclonic storm larger than Earth has shrunk to its smallest size ever measured. According to Amy Simon of NASA s Goddard Space Flight Center in Greenbelt, Maryland, recent NASA Hubble Space Telescope observations confirm that the Great Red Spot now is approximately 10,250 miles (16,500 kilometers) across. ... Bead Show | ...

Acutance . ... Crane proposes a more useful measure of accutance. To measure acutance, first the extent of the edge is found by determining two point E1 and E2 where the gradient is very low. ... The acutance is given as . ... Image Edge Profile (IEP) Acutance can be measured by determining the edge profile at the normal to an edge boundary. where m is the mean derivative of the jth boundary pixel and f(i), b(i), i 1,2,3,4 .. are the foregraound and the background pixels along the normal. ...