... Astronomical Observatory, Shevchenko Park, Odessa, 65014, . ... The XVI -th G. Gamow's Odessa Astronomical Summer Соnference-School, 14-20 August, 2016, Odessa, Ukraine . ... The XV -th G. Gamow's Odessa Astronomical Summer Соnference-School, 16-23 August, 2015, Odessa, Ukraine . ... The XIV -th G. Gamow's Odessa Astronomical Summer Соnference-School, 17-23 August, 2014, Odessa, Ukraine . ... The XIII -th G. Gamow's Odessa Astronomical Summer Соnference-School, 19-25 August, 2013, Odessa, Ukraine . ...

... Electric Forces . 19.Motion in a Circle . ... In the absence of forces, motion in a straight line and constant velocity continues indefinitely. ... Each rotation the stone covers a distance . ... Since its velocity v equals the distance it moves in one second, one finds . ... while the actual motion brings it to some point D on the circle, whose center will be denoted by O. In the absence of forces, motion in a straight line and constant velocity continues indefinitely. ...

In the absence of forces, motion in a straight line and constant velocity continues indefinitely. Motion in a circle, however, requires forces to act. ... Since its velocity v equals the distance it moves in one second, one finds . ... The above result suggests that steady motion around a circle, at least for a short time span, can be viewed as the sum of a straight-line motion with fixed velocity v , plus an accelerated motion towards the center of attraction, with the above acceleration, a . ...

ABSOLUTE PROPER MOTIONS OF 331 OPEN CLUSTERS . ... The proper motions of stars in the fields of 331 open clusters were taken from Four-Million Star Catalog (4M-catalog) of positions and proper motions (Volchkov et al. ... The absolute proper motions for 21 young open clusters have been derived by comparison of precise relative proper motions of individual stars and their corresponding absolute proper motions. ... Sign of proper motions in RA . ... 0.0001 arcsec/yr . ... rms error in RA proper motion . ...

I/146 Positions and Proper Motions (Roeser+ 1988) ================================================================================ Catalogue of Positions and Proper Motions Roeser S., Bastian U. =1988A .. ... 449R ================================================================================ ADC_Keywords: Positional data; Proper motions Description: PPM North gives J2000 positions and proper motions of 181,731 stars north of -2.5 degrees declination. ... The mean epoch is near 1931. ...

... Hubble Detects Faster-Than-Light Motion in Galaxy M87 . ... Click on image for larger version. (100kB GIF) Sequence of Hubble images showing apparent motion at six times the speed of light in the galaxy M87. ... The slanting lines track the moving features, and the speeds are given in units of the velocity of light ``c." The images were made between 1994 and 1998 with the Faint Object Camera on the Hubble Space Telescope. ... PHOTO CREDIT: John Biretta, Space Telescope Science Institute. ...

... Keywords: Proper Motions, Schmidt Plates, Astrometry, Guide Star Catalog, Palomar Sky Survey . In this paper we describe a program of determining proper motions from digitized scans of 1950's-era Palomar Sky Survey (POSS) Schmidt Plates and 1980's-era Palomar Oschin Schmidt `Quick V' plates that were taken for the Hubble Space Telescope ( HST ) Guide Star Catalogue. ... Arrows indicate the magnitude and direction of the proper motion for the stars. ...

... SAT Results ./ ... Manuals ./ Manuals/Third Party Documentation ./ Manuals/Third Party Documentation/Heidenhain Documentation ./ Manuals/Third Party Documentation/Emerson CT Documentation ./ Manuals/Third Party Documentation/Phoenix Contact Documentation ./ Manuals/Third Party Documentation/Puls ./ Manuals/Third Party Documentation/Telemecanique Documentation ./ ... Operations & Maintenance Manual Part 1 RevB:12jan15 (.pdf) . ... SAT part 1 Tests in Local Control (.pdf) . ...

Uniform Circular Motion . Kepler's First Law: All planets move about the sun in an elliptical orbit with the sun at one foci. ... In the above P is the orbital period measured in years and A is the semi-major axis measured in units of AU (the distance from the earth to the Sun). ... The discovery of retrograde motion in the orbit of mars was a serious challenge to the standard geocentric cosmology which demanded that all the planets orbit the earth in the same direction. ...

... The first column gives the star identification number, followed by X, Y positions in mm. The zero point of these offsets is star number 1 which lies at 21:24:20.52 +36:30:25.6 (equator and equinox 2000). Next are relative proper motions (muX and muY) and their errors (ex and ey) in 10**4 arcsec/yr, followed by calculated V magnitudes. The final column gives the calculated membership probabilities in percent. ...

Checking methods are not covered in the textbook, but you can find some more detailed notes about them here . Circular motion is covered in section 5.4 of the textbook (3rd edition) (section 4.12 in the 2nd edition) .