... Transits do not happen every time Mercury passes between the Earth and Sun because their orbits are not in exactly the same plane, as we will see in this activity. ... How many times would Mercury pass the Earth each year? ... Can you tell which two months the orbits of Earth and Mercury are in line with the Sun? _____________________ and ________________________ Provided by: Astronomical Society of the Pacific www.astrosociety.org Instructions: Cut these two disks out along the dotted lines. ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2005 August 24 . Epimetheus: A Small Moon of Saturn . Credit: Cassini Imaging Team , SSI , JPL , ESA , NASA . Explanation: How did Epimetheus form? ... To help answer that question, this small moon has recently been imaged again in great detail by the robot spacecraft Cassini now orbiting Saturn . ... About APOD | ...

... Epimetheus: A Small Moon of Saturn . ... Credit: Cassini Imaging Team , SSI , JPL , ESA , NASA Explanation: How did Epimetheus form? ... To help answer that question, this small moon has recently been imaged again in great detail by the robot spacecraft Cassini now orbiting Saturn . Epimetheus sometimes orbits Saturn in front of Janus , another small satellite, but sometimes behind. ... NASA Official: Jay Norris. ... Публикации с ключевыми словами: Saturn - satellite - спутники Сатурна . ...

... Mass . 17a. Measuring Mass . ... A medium-size (1.25 inch wide) binder clip, as is used in offices to hold papers together--the type made of flat blue steel, with two wire handles. ... The theory predicts that the oscillation period should be proportional to the square root of the oscillating mass, including the mass of the clip. Note that gravity plays no part here: the oscillation period would be the same on the Moon or in zero-g. Denoting square root by SQRT, we have . ...

... Archives . ... Guinness, Gosset, Fisher, and Small Samples by Joan Fisher Box . ... Gosset worked out the exact answer to his question about the probable error of the mean and tabulated the probability values of his criterion z=(m-?)/s for samples of N=2,3,?, ... Tags: distribution , error , Gosset , guinness , history , sampling distribution , small sample , student t . ... Comment ( RSS ) | ... Entries RSS . Comments RSS . ... Chandra Blog . ... Entries (RSS) and Comments (RSS) . ...

Uranus ' innermost ten moons are: . ... C ordelia is the innermost of Uranus' known satellites: orbit : 49,752 km from Uranus diameter : 26 km mass : ? ... D iscovered by Voyager 2 in 1986. ... O phelia is the second of Uranus' known satellites: orbit : 53,764 km from Uranus diameter : 32 km mass : ? ... B ianca is the third of Uranus' known satellites: orbit : 59,165 km from Uranus diameter : 44 km mass : ? ... P uck and the other small moons are very dark (albedo less than 0.1). from LANL . ...

... Planets . ... Earth Satellites . ... The newly discovered ?mega-Earth? ... Its sibling, the lava world Kepler-10b, is in the background (the two planets? proximity is grossly exaggerated) .€а Kepler-10c has a diameter of about 29 000 km, 2.3 times as large as Earth, and weighs 17 times as much. ... The first mega-earth to be discovered is Kepler-10c which orbits a star lying about 560 light years from the Sun in the constellation Draco. ... Astronomers Find a New Type of Planet: The ?Mega-Earth? ...

... More on 51 Peg: . The discovery of a Jupiter--mass planet in orbit around the solar--type star 51Peg has been reported by Michel Mayor and Didier Queloz (Geneva Observatory) on October 6th at the 9th Cambridge workshop on "cool stars, stellar systems, and the sun" held at Florence (Italy). ... Recall that the measurements of radial velocity only yield v sin i which in turn gives us M sin i. For most values of i, sin i will be greater than 0.5 and this gives a mass estimate of 0.5 Jupiter masses. ...

... Samara region . SSAU History . SSAU roadmap . ... On April 12, 2013 small spacecraft AIST developed by SSAU students and staff was launched to the Earth orbit from Baikonur Cosmodrome as additional payload to Bion-M spacecraft. On April 21, 2013 AIST successfully undocked from Bion-M spacecraft and moved to its own orbit. ... Currently SSAU develops the project of small spacecraft AIST-2 designed for Earth remote sensing purpose. ... e-mail: ssau@ssau.ru . http://www.ssau.ru . ...

Instrument Science Report OSG-CAL-97-06 Velocity Aberration Correction for Parallel Observations Colin Cox October 22, 1997 ABSTRACT The velocity aberration correction performed by the HST pointing control software is valid for the target direction only. ... For directions within 500 arcsec of the target the variation of the correction difference does not exceed 24 milli-arcsec. ... As HST orbits about the earth, the barycentric velocity and hence the velocity aberration correction varies. ...

Comets necessarily obey the same physical laws as every other object. ... If one considers only two bodies -- either the Sun and a planet, or the Sun and a comet -- the smaller body appears to follow an elliptical path or orbit about the Sun, which is at one focus of the ellipse. ... Another quantity that is conserved is called angular momentum. ... Comets simply are bodies which in general have more angular momentum per unit mass than do planets and therefore move in more elongated orbits. ...

. This artist concept depicts two white dwarfs called RX J0806.3+1527 (J0806), swirling closer together, traveling in excess of 1 million mph (1.6 million km/h). As their orbit gets smaller and smaller, leading up to a merger, the system should release more and more energy in gravitational waves. This particular pair might have the smallest orbit of any known binary system. They complete an orbit in 321.5 seconds - barely more than five minutes. Credit: GSFC/D.Berry

. Album : asv-album :: Travels to distant places and countries :: 1998/05 Boston (USA) :: 1 Boston streets . Up . << Prev . Along the Quincy Market building, small restaurants are numerous . Next >> . Photo album generated by album tool a script written by D. Madison on Tue Jun 23 14:46:37 2015 .

. Please use the following for publications and media citations: . "Based on observations obtained with Apache Point Observatory's 0.5-m Astrophysical Research Consortium Small Aperture Telescope." . List of publications based on 0.5-m observations (TBD) . for questions or comments contact archive server .

... Science User Portal . ... ESO, the European Southern Observatory . ... Travel and Contacts . Travel to ESO Headquarters . ... Survey Telescopes . ... Solar System . Star Clusters . ... Stars@ESO . ... ESO Science Newsletter . ... ESO 3.6-metre telescope . ... This animation shows the motions of bodies in the outer Solar System. Objects in long-term unstable orbits in this region are known as Centaurs and the largest Centaur is Chariklo, the first small body to be found to have a ring. ...

... Natalya V. Raguzova and Sergei B. Popov . ... We present a compilative catalogue of Be/X-ray binaries and candidates in the Galaxy and in the Large and Small Magellanic Clouds. This catalogue contains 160 sources and provides information on names and spectral types of optical components, distances, on spin characteristics of neutron stars, and on orbital and X-ray properties of binary systems. ... Be/X-Ray Binaries and candidates in the Galaxy . Galactic sources: comments to the Table 1 . ...

... The relationship of the mass and the observed galactocentric distance R -- (a), and that of the mass and the total dissipation velocity n taken from Gnedin, Ostriker (1997) -- (b). The dotted line in diagram (a) shows the "cone of survival" according to the paper by Surdin and Arkhipova (1998) . ... The solid line is a regression stright line for the main sequence of clusters, and the dotted line parallel to it separates the sequence of clusters of anomalously small mass shown by open triangles. ...

Method for High-accuracy Determinations of Orbits of Small Bodies from Three Observations . ... A new method is suggested for finding the preliminary orbit of a small celestial body from three pairs of angular measurements of its position at three moments. ... The methodical error of orbit computation by the proposed method is generally three orders smaller than the corresponding error of the traditional approach based on the construction of the unperturbed Keplerian orbit . ...

... Professor Mark Bailey completed work with the former PDRA Vacheslav Emel'yanenko on the capture of Halley-type comets from the long-period cometary flux. He also completed a paper with Ph.D. student Scott Manley on collision probabilities between small solar system bodies, and together with PDRA David Asher and visiting research fellow Vacheslav Emel'yanenko provided the explanation for the unexpected outburst of Leonid fireballs on the morning of 1998 November 17. ...