... With the Moon's terminator moving almost 10 mph (16 km/h) across its equator, how long would it take for an observer using binoculars to notice a change in lunar features? ... The lunar terminator, the sunset/sunrise line that sweeps across the Moon s surface as the Moon orbits Earth, travels at a rate of 9.6 mph (15.4 km/h) along our satellite s equator. ... Get instant access to subscriber content on Astronomy.com! ... If you are already registered on Astronomy.com, please log in below. ...

... The Sun rises higher in summer than in winter. ... Over the course of the year, the angle between the Sun and the zenith (straight up) varies by 47 degrees -- a fourth of the way across the sky. ... A solar incidence angle of 90 degrees means the Sun is on the horizon; an angle of 0 degrees means the Sun is directly overhead; negative angles, which occur only in the tropics, mean that shadows point toward the equator. ... Every day, the stars rise and set along arcs parallel to the celestial equator...

... Bad Astronomy . ... Bitesize Astronomy . ... This time, for the next few weeks, I invite you to take a look at the Universe In Motion . ... The only motions we see easily are the rising and setting of the Sun, Moon and stars, but that is a reflection of our own Earth's rotation. The stars themselves don't seem to move at all among themselves, and it takes a keen eye to discern the motion of the planets, which takes days or weeks to become obvious. ... The same is true for light. ...

From: TerryMosel aol.com Date: Sat, 4 Feb 2006 16:36:53 EST Subject: Sputnik 1, Lectures, TV, Birmingham Planetarium Hi all, (1.) ... From Peter Paice, Belfast: "Hi Terry, Margaret I saw the pass of Sputnik 1 from the back windows of our first flat in Belfast. ... From Alan Fox: "I saw Sputnik 2 - at least I saw a faint moving object going across the sky at the time and in, roughly, the place the media had said to look. ... Birmingham Planetarium. ... Clear Skies, Terry Moseley . ...

... The Moving Moons of Saturn . ... 27.06.2006 . ... Credit Copyright: Cassini Imaging Team , SSI , JPL , ESA , NASA Explanation: The moons of Saturn never stop. A space traveler orbiting the ringed giant planet would witness a continuing silent dance where Saturn's multiple moons pass near each other in numerous combinations. Like a miniature Solar System , the innermost moons orbit Saturn the fastest. ... Publications with keywords: Saturn - motion . ... A Close Pass of Saturns Moon Dione . ...

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. ...

... When you scroll through a document, are you moving the document up and down within the window, or are you moving the window up and down on top of a fixed document? When stated this way, it sounds like moving the document is more intuitive than the abstract concept of moving the window. ... If you move the cursor down far enough (e.g. using arrow keys) then the document begins to move up, as the window moves down (along with the cursor). ... This lead to the invention of the scrollbar. ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2012 September 10 . Curiosity on the Move . Image Credit: NASA / JPL-Caltech / Univ. of Arizona, HiRise-LPL . ... Curiosity is still almost 300 meters from its first major destination , though, a meeting of different types of terrain called Glenelg and visible on the image right. ... Help Evaluate APOD: How did you first hear about APOD? ...

Astronotes Armagh Planetarium's Stellar Blog! ... Solar System . ... Moon . ... Comets and Asteroids . ... What changed our view of Chariklo is the discovery of a ring system around it, the first such feature found around a Solar System body smaller than a gas giant planet. ... Almost certainly the rings were born when a collision with a smaller asteroid blasted millions of tonnes of debris off CharikloтАЩs surface. ... A ring system detected around the Centaur (10199) Chariklo (Braga-Rigas et al.) ...

Astronomy Discussion Forums . ... Atm ћ Astrophotography ћ Blackholes ћ Blackholes2 ћ CCD ћ Celestron ћ Domes ћ Education . ... New Model: How Do The Sun And Moon Appear To Move Across The Sky . ... Post Message | ... focused on the Sun and the Moon as they appear from the given location of the Earth surface: . ... www.astronomy.net . About Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

link to plots: system performance before and after the horn move. ... Focus curves done on each receiver showed that all of the kildal horns had a platform focus position about .5 lambda below the non-kildal horns (and below the expected position). ... Fig 1 top is the gain [K/Jy] before (black) and after (red) the move. ... Fig 2 shows the gain,Tsys,Sefd, and average beam widths before (black) and after (red). ... Fig 4 plots the pointing error before (black) and after (red). ...

... STScI-PRC95-11 FOR RELEASE: February 20, 1995 HUBBLE'S CLOSE-UP VIEW OF A SHOCKWAVE FROM A STELLAR EXPLOSION This image shows a small portion of a nebula called the "Cygnus Loop." ... Blue shows emission from "doubly ionized" oxygen atoms (atoms that have had two electrons stripped away) produced by the heat behind the shock front. ... This sulfur emission arises well behind the shock front, in gas that has had a chance to cool since the passage of the shock. ...

EMBARGOED UNTIL: 9:20 AM CST, January 6, 1999 CONTACT: John Biretta Space Telecsope Science Institute, Baltimore, MD (Phone: (410) 338-4917; Internet: biretta@stsci.edu) HUBBLE DETECTS FASTER-THAN-LIGHT MOTION IN GALAXY M87 Astronomers reported today discovering clouds which appear to move many times faster than the speed of light, shooting out from the region of a black hole at the center of the M87 galaxy. ... It's an illusion created by the finite speed of light and rapid motion," Biretta said. ...

... The apparent path of the Sun across the sky. ... Like the planets, the Sun, too, moves around the zodiac, making one complete circuit each year. ... 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. ...

... 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. ...

... Up: Data Analysis and Processing Techniques . ... Also, a method for quality control of CCD observations is suggested. ... Everyone who observes a celestial object using a CCD detects moving celestial objects as a ``by product''. ... We hope that our investigations may be useful for near-Earth space control and also for searches of the moving celestial objects through analysis of old and new CCD frames obtained at any amateur or professional astronomical observatory. ...

... The secret messages are calling to me endlessly They call to me across the air The messages across the atmosphere They whisper in your ear, they call me everywhere Where words cascade like rainbows Tumbling from the sky Then I'll be there, I'll be there When messages will call to you Their secrets all around Without a sound, they're all around The secret messages are calling to me endlessly They call to me across the air The ...

. To move files and directories from one place to another use the mv (move) command: mv [option] filename1 filename2 directory1 directory2 filename directory . You can also change the name of a file or directory by moving it. **Caution** . Examples . Did You Know? .

Allows you to specify a drift scan: motion at a constant velocity along a great circle. ... The path starts at the new object position (though the telescope actually intersects the path later, see Subtleties ). ... Note that the units are always /sec for both axes. ... The velocity along the path is 0.01 /sec. ... The path is assumed to start when you hit the Slew button (more precisely, when the TCC parses the command). However, it takes the telescope awhile to slew to meet the specified path. ...

... You are taller than the box, so you reach down to push it at an angle of 50 degrees from the horizontal. The coefficient of static friction between the box and the floor is 0.50 and the coefficient of kinetic friction between the box and the floor is 0.30. If you want to exert the minimum force necessary, how hard would you push to keep the box moving across the floor? ... How hard would you push to keep the box moving across the floor? ...