... Kepler's 3rd Law . 21a.Applying 3rd Law . ... Besides the Moon, Earth now has many artificial satellites, put up by us earthlings for a variety of purposes. ... where for a satellite orbiting Earth at distance of one Earth radius R E , the constant k equals k=gR E 2 . ... The velocity for a circular Earth orbit at any other distance r is similarly calculated, but one must take into account that the force of gravity is weaker at greater distances, by a factor (R E / r) 2 . ...

One possible application of a solar sail is a spacecraft to warn Earth of approaching interplanetary disturbances and shocks. ... Spacecraft that can provide such a warning are currently stationed at (or near) the Lagrangian L1 point , between the Earth and the Sun--at about 4 times the distance of the moon and 1/100 times that of the Sun. ... Because of the greater distance from Earth, the Earth's pull there is weaker, not enough to make the spacecraft match the Earth's motion around the Sun. ...

... Subject of Astronomy. ... Basis of Spherical and Practical Astronomy. ... Celestial Sphere. ... Changes of Star's Coordinates as a Result of Daily Rotation of Celestial Sphere. ... Time Measuring. ... Changes of Solar Equatorial Coordinates. ... Stellar Day, Stellar Time. ... Real Solar Time. ... Mean Solar Time. ... Connections between Stellar and Mean Time. ... Apparent Path and Configuration of Planets. ... Ways of Energy Transportation to Stellar Surface.Basis of Spectral Analysis. ... Solar...

home publications > mercury . SEARCH ASP SITE: Match ALL words Match ANY word . Books . ASP Conference Series . Monograph Publications . IAU Publications . Books of Note . ... Publications of the ASP (PASP) . ... Mercury Magazine . ... VOLVELLES! Early Paper Astronomical Computers . ... People always have been fascinated by the movement of objects in the sky. ... Thus, events in the sky were important for the day-to-day life of many early civilizations. ... publications . ...

... Tonight's Sky . ... PHASE т?? ... Supernova showered Earth with radioactive debris . ... Astronomy for Kids . ... Swift satellite records early phase of gamma-ray burst . ... United Kingdom astronomers, using a telescope aboard the NASA Swift satellite, have captured information from the early stages of a gamma-ray burst - the most violent and luminous explosions occurring in the universe since the Big Bang. ... Only registered members of Astronomy.com are allowed to comment on this article. ...

Phoebe . Saturn IX . Phoebe [FEE-bee] is the last of the known satellites of Saturn, at a distance of 12.952 million kilometers (8 million miles). Phoebe orbits Saturn in a retrograde direction (opposite to the direction of the other satellites' orbits) in a plane much closer to the ecliptic than to Saturn's equatorial plane. ... Scientists believe that Phoebe may be a captured asteroid with a composition unmodified since the time it was formed in the outer Solar System . ...

Astronomy Picture of the Day . ... 14.06.1997 . ... Credit: F. Summers ( Princeton ), D. Cox, R. Patterson, E. Wesselak, and B. Sanders ( NCSA ), L. Carpenter ( Pixar ), GC3 , Cosmic Voyage , Smithsonian Explanation: What did our universe look like when it was young? ... Galaxies and long filaments formed - which are shown by the bright patches and streaks in the above frame . ... June 1997 . ... Building Galaxies in the Early Universe . ... Unexpected Galaxy String in the Early Universe . ...

University Satellites and . Space Science Education . ... Practical Training for Students in Simulated Satellite Navigation and Attitude Determination for Universitetskiy-Tatyana Satellite - an Overview . ... The practical training has been developed to provide a basic introduction for students into satellite navigation, satellite motion in space, Kepler orbits, and computational techniques involved in dealing with problems of navigation. ...

... A distance-limited sample of southern Wolf-Rayet stars within 3 kpc of the Sun has been observed with the Australia Telescope Compact Array at 8.64 GHz and 4.80 GHz. ... Five sources are classified as non-thermal. ... We derive mass-loss rates for the thermal sources. After combining them with all existing radio mass-loss rates of Wolf-Rayet stars in the northern and southern hemisphere, we perform a comparison with mass-loss rates derived from optical emission lines. ...

... European Southern Observatory micro Workshop on: . ESO, Garching bei M nchen, Germany . ... Contrary to normal ESO practice there is no block-booking at Garching Hotels for this workshop. ... More Information on hotels in Garching on ESO's web-site or alternatively you can find here or try your favourite search engine. ... The international airport of Munich (M nchen) is located some 20 km north of Garching. ... More travel instructions can be found on the ESO Travel and Local Information pages. ...

... Main page News People . ASA . Master . Master net Homepage . ... MASTER . ... About Space Monitoring Laboratory, scientific directions, instruments, contacts . ... Latest news and news archive . ... 21.05.2011 . ... All news ...

... Concept Spacecraft . ... The proposed lentiular design concept for the Apollo spacecraft was one of several unorthodox designs rejected in favour of the more familiar conical shape which was lighter and less complex.The lenticular design was a ?road not taken?, losing out to less challenging configurations.It is strange to think that if history had proceeded differently, each Apollo crew could have ended their lunar mission by gliding to a touchdown on a runway at Edwards AFB in a flying saucer! ...

EVIDENCE FOR AGE DELAY BETWEEN THE FORMATION OF THE OLD HALO AND THE THICK DISK. ... The metallicity function of globular clusters of thick disk and old halo is shown on Fig.1Ю There are a two approximately the same normal distribution with well-defined gap between them with width [Fe/H] 0.2 dex. ... Metallicity function (left panel), and age distribution (right panel) for the old halo and thick disk globular clusters. ... Plots of V S against cos for the thick disk and the old halo samples. ...

... LABORATORY OF RADIO ASTRONOMICAL OBSERVATIONS . Radio sources identification is one of the most important tasks of the current radio astrophysics. ... Optical idetification. ... Optical identifications of subsample of steep spectra radio sources from RC catalog using 6m SAO telescope of SAO RAS: optical observations. ... Astronomy Reports. ... Identification of radio sources with data of various radio catalogs allows one to construct continual spectrum of the object and its radio structure. ...

Astronomy Terms - To Help You Study The Universe . Articles | ... Learning about the universe, or the study of astronomy, can be fun for the individual or for the whole family. ... Learning a few simple terms will help you with this fascinating study. ... You will use a telescope or binoculars for your observation of the sky at night. ... Celestial Terms . ... Meteor or a shooting star – the light caused when a meteoroid burns up in Earth's . ... www.astronomy.net . About Astronomy Net | ...

From: TerryMosel@aol.com Date: Sun, 10 Feb 2002 09:21:17 EST Subject: Comet + 2 TV Progs Hi all, Comet Ikeya-Zhang is brightening a bit faster than predicted, and is already about magnitude 7.5, and should reach naked eye visibility by early March. ... I will circulate new elements when the latest calculations are available. ... Positions are given for both the old 1950 and the new 2000 co-ordinates. ... February 2002. ... Last Revised: 2002 February 11th . ...

... The sample of the Local Volume galaxies (distance smaller than 10 Mpc) gives a unique opportunity to study the properties of galaxies including the weakest objects: the absolute magnitude M B -10 and the virial mass M vir 10 9 M x263C;. ... Luminosity function of the Local Volume galaxies. ... The luminosity functions for galaxies are presented: red dashed line - from the 2dFGRS survey (Norberg et al. 2002); blue dash-dotted line - from the SDSS survey (Blanton et al. ...

... Bad Astronomy . ... Bitesize Astronomy . ... Bad Astro Store . ... Site Info . ... It is from from Voyager 1 and shows a whopping big impact crater dominating the profile of the moon. Note that Mimas is about 400 kilometers across (about 250 miles). ... The wall around the crater is 5 kilometers high, and that central peak rises 6 kilometers above the surface (many impact craters have a large central peak which is caused by a pressure rebound from the impact). ... 2008 Phil Plait. ...

... At the crossing of Shijo dori and Karasuma dori. Dori" is street in Japanese. a04. ... A view to Karasuma dori; center of the city is in opposite direction. ... Crossed Kamogawa, standing near narrow boulevard. a13. ... A view to the river near Kyoto International Conference Hall (KICH). b12. ... Pagoda of Toji temple. c23. ... In the small temple of Imperial Palace park. f15. In the small temple of Imperial Palace park. f16. In the small temple of Imperial Palace park. f17. ...

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