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Topic: Proper motion

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	Early American Manual Therapy
		The limitation to this proper motion is given by ligaments, or by cartilage as in the case of the intervertebral disc, or by bony contact; and this imitation then transforms the proper or primary motion into secondary motion.
		The lightness of the motion in the dorsal region is still further indicated in the smallness of the costal facets on the vertebral bodies, and in the flatness of the superior and inferior surfaces of the vertebral bodies with the thinness of the intervertebral discs.
		The proper motion of the occiput on the atlas is extension-flexion, or nodding; with slight side-bending and slighter rotation.
	www.meridianinstitute.com /eamt/files/tucker/tuckch4.html (1696 words)

	proper motion - HighBeam Encyclopedia
		proper motion in astronomy, apparent movement of a star on the celestial sphere, usually measured as seconds of arc per year; it is due both to the actual relative motions of the sun and the star through space.
		Proper motion reflects only transverse motion, i.e., the component of motion across the line of sight to the star; it does not include the component of motion toward or away from the sun.
		The average proper motion of the stars that can be seen with the naked eye is 0.1′′ per year.
	www.encyclopedia.com /doc/1E1-propermo.html (269 words)

	Springer Online Reference Works (Site not responding. Last check: 2007-11-06)
		It is called proper (a motion of the first kind) or improper (a motion of the second kind), depending on whether or not the orientation of the space is preserved.
		A proper motion in three-dimensional space is either a rotation around an axis or a parallel displacement, or else can be represented as the product of a rotation around an axis and a parallel displacement in the direction of the axis (helical motion).
		A motion of a Euclidean space is thus an isometric mapping of the space onto itself.
	eom.springer.de /m/m065030.htm (586 words)

	Art. 1. How Business Is Conducted in Deliberative Assemblies. 10. Proper Motions to Use to Accomplish Certain Objects
		Motions, as a general rule, require for their adoption only a majority vote — that is, a majority of the votes cast, a quorum being present; but motions to suppress or limit debate, or to prevent the consideration of a question, or, without notice to rescind action previously taken, require a two-thirds vote [48].
		These motions to limit or close debate require a two-thirds vote for their adoption, and are in order, like the previous question, when any debatable question is immediately pending.
		of a motion have a large majority, laying it on the table is not a safe way of suppressing it, because its friends, by watching their opportunity, may find themselves in a majority and take it from the table and adopt it, as shown in the next paragraph.
	www.bartleby.com /176/10.html (1306 words)

	Highbeam Encyclopedia - Search Results for proper
		The Cévennes proper occupy the central section of a mountainous arc (average height 3,000 ft/910 m), swinging generally NE from the Montagne Noire (NE of Toulouse) to Mont Pilat (SW of Lyons).
		Barnard's star star with the largest observed proper motion (rate of motion across the sky with respect to other stars); located in the constellation Ophiuchus.
		The star's large proper motion, 10.28â²â² per year (or half the moon's apparent diameter in a century), is due in part to the fact that it is the
	www.encyclopedia.com /searchpool.asp?target=proper (554 words)

	Your Sky Help: Proper Motion
		Even motion of 50 kilometers per second which, over a year causes a star to move more than one and a half thousand million kilometers--farther than Saturn is from the Sun, isn't going to be particularly apparent when you're looking at it from a couple of hundred light years away.
		Proper motion is "real motion"; all the other, more dramatic, "motion" of the stars is only "apparent motion", due to the rotation of the Earth, motion of the Earth in its orbit, and a host of other, more subtle, effects (for example, aberration due to the finite speed of light).
		A star with a large proper motion is not necessarily moving unusually swiftly in space; in most cases it simply seems to move quickly because it's nearby and hence the baseline of the observation is short.
	www.fourmilab.ch /yoursky/help/proper.html (717 words)

	The Hipparcos Space Astrometry Mission: Educational Resources: High Proper Motion Stars
		The proper motion of a star is its apparent angular movement per year on the celestial sphere.
		The full space motion of a star is the combination of this proper motion (which is a quantity measured by the Hipparcos satellite) with the "radial velocity" of the star, along the line of sight.
		The units of the proper motion for all stars in the Hipparcos and Tycho Catalogues is mas/yr (or milliarcseconds per year).
	www.rssd.esa.int /Hipparcos/properm.html (1048 words)

	proper motion
		The apparent angular rate of motion of a star or other object across the line of sight on the celestial sphere.
		Periodic perturbations, or wobbles, in a star's proper motion are indicative of an unseen companion, which may be a dim star, a brown dwarf, or a planet.
		In 1844, Friedrich Bessel reported variations in the proper motions of Sirius and Procyon, now known to be due to white dwarf companions.
	www.daviddarling.info /encyclopedia/P/propermotion.html (233 words)

	Proper Motion (Site not responding. Last check: 2007-11-06)
		Proper motion is the apparent motion of a star across the celestial sphere at right angles to the observer's line of sight; any radial motion (toward or away from the Sun) is not included.
		Proper motion is generally measured in seconds of arc per year; the largest known is that of Barnard's star in the constellation Ophiuchus, about 10" yearly.
		Proper motion causes the shape of constellations to distort over time.
	abyss.uoregon.edu /~js/glossary/proper_motion.html (101 words)

	proper motion concept from the Astronomy knowledge base
		The star with the largest proper motion is Barnard's Star, whose proper motion is 10.3 arc-seconds per year.
		Proper motion is usually tabulated in star catalogs as changes in right ascension and declination per year or century.
		reduced proper motion (2 facts) - The observed proper motion of a star (in seconds of arc per year) reduced to absolute proper motion (in kilometers per second).
	www.site.uottawa.ca:4321 /astronomy/propermotion.html (185 words)

	Zoom Astronomy Glossary: P
		A parabola is a conic section, a curve that is a set of points (P) such that the distance from a line (the directrix) to P is equal to the distance from P to focus F. Parabolas have an eccentricity of 1.
		Proper motion is the actual motion of a star across the sky (not toward or away from the Earth).
		The proper motions of a star is the distance that it moves across the sky each year.
	www.enchantedlearning.com /subjects/astronomy/glossary/indexp.shtml (4166 words)

	VLBA Measures Galaxy's Motion in Space
		While scientists have been measuring the motion of galaxies directly toward or away from Earth for decades, this is the first time that the transverse motion (called proper motion by astronomers) has been measured for a galaxy that is not a satellite of our own Milky Way Galaxy.
		In addition to measuring the motion of M33 as a whole, the astronomers also were able to make a direct measurement of the spiral galaxy's rotation.
		The motion of the Solar System and the Earth around the Galactic center, some 26,000 light-years away, has been accurately measured using the VLBA over the last decade.
	www.nrao.edu /pr/2005/m33motion (817 words)

	Changes of Celestial Coordinates
		The motion of Earth with a periodically varying direction of velocity is also responsible for the aberration of light, an apparent deviation of stars from their position with annual periodicity.
		Only the tangential component of the relative motion of a star shows up in proper motion, which is measured in arc seconds per year or per century; the radial component (which changes the distance) can be measured with much higher accuracy in the Doppler shift of spectral lines visible in the spectra of stars.
		The star with the largest observed proper motion is 9.7 mag Barnard's Star in Ophiuchus with 10.27 "/y (arc seconds per year).
	www.seds.org /~spider/spider/ScholarX/coord_ch.html (1035 words)

	[No title]
		This is because the proper motion during the light time has been neglected.
		If an object with a detectable proper motion has a distance which is unknown, or known only inaccurately, there are wild uncertainties in the resulting space motion vector.
		However, the `B' and `C' omissions are corrected: the light-time effects on proper motion are properly handled, and the transformation complies with special relativity.
	www.iau-sofa.rl.ac.uk /2001_0331/sofa/starpv.txt (894 words)

	Proper Motions in the Local Group
		Measuring the proper motions and geometric distances of galaxies within the Local Group is very important for our understanding of the history, present state and future of the Local Group.
		Currently, proper motion measurements using optical methods are limited only to the closest companions of the Milky Way.
		The first error indicates the statistical error from the proper motion measurements while the second error is the systematic error from the rotation model.
	www.mpifr-bonn.mpg.de /staff/abrunthaler/proper.shtml (633 words)

	Distance to the Hyades Star Cluster
		For stars visible to the naked eye, the average proper motion is around 0.1 arcsec per year (remember how small an arc second is? A tennis ball 8 miles away is an arcsecond in diameter).
		Proper motion is generally measured by taking photographs several years apart and measuring the movement of the image of a star with respect to more distant background stars over that time period.
		This point of convergence is determined on a chart of the sky by simply extending the lines of proper motion of each star, and finding their point of intersection.
	www.astro.washington.edu /labs/clearinghouse/labs/Hyades/disthyad.html (1383 words)

	REVISEDLHS - Revised Luyten Half-Second (LHS) Catalog
		In total, there are revised proper motion measurements and coordinates for 4040 stars and revised coordinates for 4330 stars.
		H = coordinates, proper motion and magnitudes are from the Tycho-2 Supplement-1 catalogue, i.e.
		The total proper motion of the star, in arcseconds per year, as listed in the Original (1979 version) LHS Catalog.
	heasarc.gsfc.nasa.gov /W3Browse/all/revisedlhs.html (978 words)

	Book 1 -- Lesson 3-- You and your Guitar
		The motion is similar to that of a typewriter key as it is depressed (for those of you who have ever even seen typewriters.) Each finger should be able to move independently.
		This motion from the elbow of the left arm is the basic motion that moves your fingers from string to string.
		The motion is a simple rotation of the right shoulder, sliding the forearm along the guitar, and causing the entire hand to move along the strings either toward the nut (left) or the saddle (right).
	www.classic-guitar.com /lesson3.html (3309 words)

	[No title]
		Proper motion is motion we detect due to actual relative velocities of stars.
		See the motion of Barnard's star as determined with a relatively small telescope.
		H12 is the proper motion in right ascension H13 is the proper motion in declination Record these values.
	faculty.luther.edu /~wilkerje/propermotion.html (646 words)

	Proper motion
		The data are analyzed in terms of the counts, color indices, proper motions, and variability of faint quasar candidates.
		We have studied the proper motion and variability properties of all stellar objects with J less than or = 22.5 or F less than or = 21.5 in the SA 57 field which has previously been surveyed with a multicolor QSO search by KK88.
		A survey of proper motions and variability was conducted of all 1185 stellar objects to J = 22.5 or F = 21.5 in the North Galactic Pole field SA57.
	laserstars.org /references/proper.html (979 words)

	4.7 Proper Motion (Site not responding. Last check: 2007-11-06)
		A star observed as part of normal astronomy research will, as a rule, have a proper motion which is unknown.
		Proper motion is also allowed for in various other routines as appropriate, for example sla_MAP and sla_FK425.
		Note that in all SLALIB routines which involve proper motion the units are radians per year and the
	obswww.unige.ch /~simond/Documentations/SLALIB/node23.html (220 words)

	How to increase hockey stickhandling skills
		Match the motion you see on the video with the players motion to be sure you achieve the desired results.
		If the player can use the proper motion on the level 1 ball for all 30 reps, then this is the appropriate level to begin at.
		After a proper wrist roll the tip should be all the way to the opposite side and this should also be the next side starting position.
	www.kwikhands.com /khuse.htm (1162 words)

	Proper Motion of Stars (Site not responding. Last check: 2007-11-06)
		The movement is too small to be noticed by eye and as such the constellations have retained their shape since human history began.
		The angular velocity of a star (with respect to the Sun) is termed the star's proper motion.
		Only the nearest stars show any discernable proper motion over a human lifetime - Barnard's Star (the second closest star to the Sun) shows a proper motion of only 10.25 arcseconds per year.
	www.st-andrews.ac.uk /~bds2/ltsn/ljm/JAVA/PROPER/proper.htm (155 words)

	On Spiral Nebulae, van Maanen et al., Part 2
		Ritchey on February 7-8, 1910, both at the 25-foot focus of the 60-inch reflector, enabled the proper motion of the nebula and the relative motion of its parts to be determined.
		The internal proper motion is not a pure rotation since the mean radial component is outward and is 42 percent of the mean tangential component which is 0".019 ENWS; rather it is a spiral motion out along the arms at the rate of 0".021 per year together with a slight outward radial motion of 0".003.
		From an unpublished investigation on the proper motion of 100 spiral nebulae, derived from micrometric and photographic measures, we give the following results for N.G.C. a giant nebulous star forming region in M33] measured as one mass to illustrate the accuracy of the measures.
	www.datasync.com /~rsf1/avm-bib2.htm (1345 words)

	Absolute proper motions of 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 mean absolute proper motions of open clusters were computed by averaging the 4M-catalog proper motions of their members selected on the basis of the photometric color-magnitude diagrams, radial velocities, and the membership probabilities by relative proper motions.
		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.
	www.sai.msu.su /groups/cluster/cl/pm (531 words)

	Proper Motion project (Site not responding. Last check: 2007-11-06)
		These motions can be directly determined by velocity measurements from Doppler shifts or by the progressively angular displacements of stars.
		The term proper motion is used to denote the angular displacement of nearby stars caused by their motion relative to the Sun and is expressed in units of arcseconds per year.
		The largest proper motion so far discovered is that of Barnard's star which moves 10 arcseconds per year, i.e.
	www.dur.ac.uk /john.lucey/astrolab/proper_motions.html (269 words)

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