This section of AMPLE enables one to make ephemeris calculations in various coordinate systems (spherical, rectangular) connected with different main planes (equator, ecliptic, horizon) and having origin in different points: geocenter, any point on the Earth surface, the Sun, any major planet, any minor planet. The choice of some minor planet as a center gives possibility to find approaches of the minor planet with any set of major planets and minor planets. ... equinox . 1950 2000 true . ...

... Parallel to HIPASS: o HIDEEP: "The HI equivalent of the Hubble Deep Field" ­ (9000s per beam) HIDEEP: The Basics ! ... selection limits: o peak flux and velocity width limited o limits are 9.6 mJy and 4 ch = 52.8 km/s o completeness limit at ~18 mJy 5 optim.smooth limit 3 peak flux limit HIDEEP: Optical Follow-Up ! ... Galaxies in HIDEEP are more gas-rich observed corrected HIDEEP: Column Densities - Theory TB = ! ... There don't appear to be any low-column density galaxies in HIDEEP ! ...

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Astronomy Binoculars - The Skies The Limit . ... Binoculars for astronomy are usually powerful. ... If you are buying a hand held binocular to look at the skies, make sure it isn't so heavy that you can't hold it for long periods of time. ... You should also visit some astronomy web sites or binocular reviews and see what the astronomy enthusiast are using. ... Remember that binoculars for astronomy tend to be very powerful and they don't usually have a huge field of view. ... www.astronomy.net . ...

... January 20, 1999 . Possible Planets And Infrared Dust . Credit: Left- A. Weinberger, E. Becklin ( UCLA ), G. Schneider ( U. Arizona ), NASA . Right- B. Smith (U. Hawaii), Glenn Schneider ( U. Arizona ), NASA . ... At left, the dark gap seen in the dust disk is reminiscent of a similar large gap in Saturn's rings believed to be sculpted by orbiting moons. By analogy, the gap in the dust disk of HD 141569 may be a larger scale result of unseen orbiting planets. ... About APOD > . ...

3) Planets and Brown Dwarfs . ... By its nature, this method is most sensitive to massive planets orbiting close to their stars. ... That means that some of the more massive extrasolar planets could actually be brown dwarfs (although the statistics of the finds suggest that most of them are not). ... Another possible difference between brown dwarfs and massive planets is how they are born. ... They would base the fundamental definition on the mode of formation: a planet is built from planetesimals. ...

spaceweb@oulu.fi - last update: 5 June 1998, 1100 UT (RR) . Mercury is the closest (0.39 AU) planet to the Sun . ... It has, e.g., an exceptionally high density, a magnetosphere with unknown origin, and no permanent atmosphere or ionosphere . ... The magnetosphere - solar wind interaction must lead to the development of a magnetospheric current system, and magnetospheric substorms take place. ... The substorms are very short-lived, only couple of minutes. ... 1998). ... 103 , 9113-9119, 1998. ...

... Tonight's Sky . ... The Magazine . ... Star Atlas . ... An artificial comet holds secrets to Earths life . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . ... The planet has extreme temperature swings and perhaps active lava flows. ... A digital supplement to Astronomy magazine. ... Join TravelQuest International with Astronomy and Discover magazines on one of three great tour options surrounding this celestial spectacle . ... Astronomy Magazine . ...

... Landsat 7 Views Planet Earth . ... 14.05.1999 . ... Credit Copyright: Landsat 7 Project , NASA Explanation: Launched last month, NASA's Landsat 7 spacecraft now orbits planet Earth . Looking down from an altitude of 700 km, Landsat 7 can map the planet's surface in visible and infrared bands and resolve features 30 meters across or smaller. ... Publications with keywords: Earth - planet - landsat - san fransisco . Publications with words: Earth - planet - landsat - san fransisco . ...

... Lecture Series . Lecture Series Home . ... Space Telescope Science Institute and Johns Hopkins University . ... Baltimore, MD 21218 . ... Parking in the immediate area is extremely limited. Paid parking is available in the San Martin Center garage; a limited number of paid spots are also available in the lot just west of Homewood Field/adjacent to the ROTC building. Site contents ї Space Telescope Science Institute and Johns Hopkins University . ...

... GCN 8471 | ... TITLE: GCN CIRCULAR NUMBER: 8516 SUBJECT: GRB 081102: MASTER refind and final results DATE: 08/11/11 15:50:10 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs E. Gorbovskoy, V. Lipunov, V.Kornilov, A.Belinski, N.Shatskiy, N.Tyurina, D.Kuvshinov, P.Balanutsa Sternberg Astronomical Institute, Moscow State University A. Tlatov, A.Parkhomenko Kislovodsk Solar Station of the Pulkovo Observatory V.Krushinski, I.Zalognikh Ural State GCN Circ 8470, Lipunov et al., ...

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... Bad Astronomy . ... Bad Astronomy: The North Star, Polaris, is a very bright star. Good Astronomy: Polaris is a middling-bright star, easily missed. ... He said it was close to Polaris, the North Star, but he also said it was in the East. ... It's natural, I suppose, to think that such an important star should be bright, but really, that's a conceit, like thinking that the Earth is at the center of the Universe. If more people knew just why Polaris is the North Star, this Bad Idea would stop. ...

... Bojan Nikolic web pages (r. 329) . ... Using high-resolution three-dimensional realisations of turbulent fields, we investigate the limits on achievable performance of atmospheric phase correction using water-vapour radiometers arising from following effects: the incoherent measurement of power from water by the radiometers (in contrast to coherent detection of the astronomical signal); the different tapers of the response patterns of the astronomical and radiometer receivers; and, the ...

... Mars is the fourth from the Sun big planet of the Solar system. ... Once a 15 - 17 years occures so-called the great opposition when the planets come nearer about 56 billions km. ... The new level of Mars investigation began in 1965 when the spaceships were used to fly round the Mars and from 1971 landed on the planet. ... The investigations of Mars showes the traces of vulcanization on this planet: the splits and rawins sometimes hundred kilometers long. ... Mars's atmosphere and the water. ...

... Earth Satellites . ... Image Dan Burbank and Anton Shkaplero making music onboard the ISS (Image credit: NASA) . The first occurrence of music being made in space was during the Gemini 6 mission in 1965. ... Since then many astronauts have brought instruments into space with them, including many crews onboard the International Space Station. ... The Gemini astronauts were treated to some musical interludes during their times in space but not specifically to wake them in the morning. ...

... Re : Can you block or ignore ICMP packets? ... While adding that #define CONFIG_IP_IGNORE_ECHO_REQUESTS into linux/net/ipv4/icmp.c will work fine for now, I'd suggest putting it into the configuration-headers so it doesn't tangle up with further patches, or, should that define later move into different file(s), lose it's efficiency. ... Meanwhile, if you're worried that ignoring _all_ echo-requests may be a bit too rough move, there's a way to make the kernel ignore them selectively. ...

... Billions of years ago the surface of Mars looked very different than it does today. Where there is now only a dry red desert, there was once an vast ocean that covered about 20% the planet's surface. That means it covered more of the surface of Mars than the Atlantic Ocean covers on Earth! ... So, by looking at how much heavy water is in Mars' atmosphere in comparison to the lighter kind, we can tell how much normal water the planet has lost into space. ...

... The planning and reduction programs are distributed with array sizes set large enough to let most observers work without difficulty. However, you might need to reduce a very large data set, or to deal with a very large number of passbands (9 is the nominal limit). ... The main problem is holding the matrix of normal equations during the iterations; on the other hand, star catalogs can be made quite large without paying much of a price in terms of performance. ...

Next: Ejectors in Massive Binary Previous: Artificial Galaxy: Full Matrix . The first version of the Scenario Machine was aimed especially at the simulation of massive binary star evolution. ... First, there is a large class of intermediate mass binaries (say, consisting initially of 8 + 5 solar masses) that can also produce NS and thus lead to the formation of a bright X-ray source. ... Next: Ejectors in Massive Binary Previous: Artificial Galaxy: Full Matrix Mike E. Prokhorov . ...