Matches in DBpedia 2015-10 for { <http://dbpedia.org/resource/Proper_motion> ?p ?o }
- Proper_motion abstract "Proper motion is the astronomical measure of the observed changes in apparent positions of stars in the sky as seen from the center of mass of the Solar System, as compared to the imaginary fixed background of the more distant stars.It was first physically measured individually in both seconds of time in right ascension (RA or α) and seconds of arc in declination (Dec. or δ), whose calculated combined value, is the total proper motion (μ) expressed in seconds of arc per year (arcsec/yr) or per century (arcsec/100yr), where 3600 arcseconds equal one degree. Because most proper motions are much less than one arcsec per year, most modern catalogues, like the Hipparcos Index Catalogue (HIP), now express proper motion in terms of milliarcseconds per year (mas/yr), where 1000 mas equals one arcsecond. This measured sky motion is separate from the radial velocity, measured in kilometres per second (km/s), being the velocity moving toward or away from the observer, as usefully obtained by the small Doppler shifts seen in starlight when using astronomical spectroscopy. Knowledge of the proper motion and Doppler shift allow approximate calculations of a star's true motion in space in respect to the Sun.Proper motion is not entirely "proper" (that is, intrinsic to the star), because it includes a component due to the motion of the Solar System itself. Due to the finite speed of light (that is also constant; without regard to whatever is the velocity of the emanating or reflecting source) the instantaneous velocities of distant stars cannot be observed; the observed proper motion reflects the velocity of a star relative to the Solar System at the time the light was emitted from that star.".
- Proper_motion thumbnail Proper_motion.JPG?width=300.
- Proper_motion wikiPageExternalLink simbad.
- Proper_motion wikiPageExternalLink index-e.html.
- Proper_motion wikiPageExternalLink halley-proper-motions.
- Proper_motion wikiPageExternalLink index.php?project=HIPPARCOS&page=high_p.
- Proper_motion wikiPageExternalLink www.xephem.com.
- Proper_motion wikiPageID "52015".
- Proper_motion wikiPageLength "24539".
- Proper_motion wikiPageOutDegree "87".
- Proper_motion wikiPageRevisionID "678799874".
- Proper_motion wikiPageWikiLink 61_Cygni.
- Proper_motion wikiPageWikiLink Aldebaran.
- Proper_motion wikiPageWikiLink Alpha_Centauri.
- Proper_motion wikiPageWikiLink Andromeda_Galaxy.
- Proper_motion wikiPageWikiLink Andromeda–Milky_Way_collision.
- Proper_motion wikiPageWikiLink Apparent_magnitude.
- Proper_motion wikiPageWikiLink Arcsecond.
- Proper_motion wikiPageWikiLink Arcturus.
- Proper_motion wikiPageWikiLink Barnards_Star.
- Proper_motion wikiPageWikiLink Barnards_star.
- Proper_motion wikiPageWikiLink Bayer_designation.
- Proper_motion wikiPageWikiLink Blink_comparator.
- Proper_motion wikiPageWikiLink Category:Astrometry.
- Proper_motion wikiPageWikiLink Category:Stellar_astronomy.
- Proper_motion wikiPageWikiLink Celestial_coordinate_system.
- Proper_motion wikiPageWikiLink Celestial_coordinates.
- Proper_motion wikiPageWikiLink Celestial_sphere.
- Proper_motion wikiPageWikiLink Center_of_mass.
- Proper_motion wikiPageWikiLink Constellation.
- Proper_motion wikiPageWikiLink Crux.
- Proper_motion wikiPageWikiLink Declination.
- Proper_motion wikiPageWikiLink Degree_(angle).
- Proper_motion wikiPageWikiLink Delphinus.
- Proper_motion wikiPageWikiLink Doppler_effect.
- Proper_motion wikiPageWikiLink Doppler_shift.
- Proper_motion wikiPageWikiLink Double_star.
- Proper_motion wikiPageWikiLink Edmond_Halley.
- Proper_motion wikiPageWikiLink Edmund_Halley.
- Proper_motion wikiPageWikiLink Epsilon_Indi.
- Proper_motion wikiPageWikiLink Euclidean_vector.
- Proper_motion wikiPageWikiLink Galaxy_rotation_curve.
- Proper_motion wikiPageWikiLink Gliese_1.
- Proper_motion wikiPageWikiLink Groombridge_1830.
- Proper_motion wikiPageWikiLink HIP_67593.
- Proper_motion wikiPageWikiLink Hipparchus.
- Proper_motion wikiPageWikiLink Hipparcos.
- Proper_motion wikiPageWikiLink Hipparcos_Catalogue.
- Proper_motion wikiPageWikiLink Image_differencing.
- Proper_motion wikiPageWikiLink Kapteyns_Star.
- Proper_motion wikiPageWikiLink Kapteyns_star.
- Proper_motion wikiPageWikiLink Lacaille_9352.
- Proper_motion wikiPageWikiLink Lalande_21185.
- Proper_motion wikiPageWikiLink Leonard-Merritt_mass_estimator.
- Proper_motion wikiPageWikiLink Leonard–Merritt_mass_estimator.
- Proper_motion wikiPageWikiLink Light-year.
- Proper_motion wikiPageWikiLink List_of_nearest_stars.
- Proper_motion wikiPageWikiLink List_of_nearest_stars_and_brown_dwarfs.
- Proper_motion wikiPageWikiLink List_of_stars_in_the_Hipparcos_Catalogue.
- Proper_motion wikiPageWikiLink Local_Group.
- Proper_motion wikiPageWikiLink Macrobius.
- Proper_motion wikiPageWikiLink March_equinox.
- Proper_motion wikiPageWikiLink Messier_106.
- Proper_motion wikiPageWikiLink Milky_Way.
- Proper_motion wikiPageWikiLink Minute_and_second_of_arc.
- Proper_motion wikiPageWikiLink Minute_of_arc.
- Proper_motion wikiPageWikiLink Motion_(physics).
- Proper_motion wikiPageWikiLink National_Geographic_Society_–_Palomar_Observatory_Sky_Survey.
- Proper_motion wikiPageWikiLink Open_cluster.
- Proper_motion wikiPageWikiLink Parsec.
- Proper_motion wikiPageWikiLink Peculiar_motion.
- Proper_motion wikiPageWikiLink Peculiar_velocity.
- Proper_motion wikiPageWikiLink Position_angle.
- Proper_motion wikiPageWikiLink Radial_velocities.
- Proper_motion wikiPageWikiLink Radial_velocity.
- Proper_motion wikiPageWikiLink Red_dwarf.
- Proper_motion wikiPageWikiLink Rho_Aquilae.
- Proper_motion wikiPageWikiLink Right_ascension.
- Proper_motion wikiPageWikiLink Sagittarius_A*.
- Proper_motion wikiPageWikiLink Selection_bias.
- Proper_motion wikiPageWikiLink Sgr_A*.
- Proper_motion wikiPageWikiLink Sirius.
- Proper_motion wikiPageWikiLink Solar_System.
- Proper_motion wikiPageWikiLink Solar_apex.
- Proper_motion wikiPageWikiLink Solar_mass.
- Proper_motion wikiPageWikiLink Spectroscopy.
- Proper_motion wikiPageWikiLink Star.
- Proper_motion wikiPageWikiLink Sun.
- Proper_motion wikiPageWikiLink Teegardens_star.
- Proper_motion wikiPageWikiLink Telescope.
- Proper_motion wikiPageWikiLink Triangulum_Galaxy.
- Proper_motion wikiPageWikiLink Ursa_Major.
- Proper_motion wikiPageWikiLink Vector_(spatial).
- Proper_motion wikiPageWikiLink Vernal_equinox.
- Proper_motion wikiPageWikiLink Very-long-baseline_interferometry.
- Proper_motion wikiPageWikiLink Very_Long_Baseline_Interferometry.
- Proper_motion wikiPageWikiLink Wolf_424.
- Proper_motion wikiPageWikiLink File:61_Cygni_Proper_Motion.gif.
- Proper_motion wikiPageWikiLink File:Barnard2005.gif.
- Proper_motion wikiPageWikiLink File:Components_of_proper_motion.JPG.