Matches in DBpedia 2015-10 for { <http://dbpedia.org/resource/HR_8799> ?p ?o }
- HR_8799 abstract "HR 8799 is a young (~30 million-year-old) main-sequence star located 129 light years (39 parsecs) away from Earth in the constellation of Pegasus, with roughly 1.5 times the Sun's mass and 4.9 times its luminosity. It is part of a system that also contains a debris disk and at least four massive planets. Those planets, along with Fomalhaut b, were the first extrasolar planets whose orbital motion was confirmed via direct imaging. The designation HR 8799 is the star's identifier in the Bright Star Catalogue. The star is a Gamma Doradus variable: its luminosity changes because of non-radial pulsations of its surface. The star is also classified as a Lambda Boötis star, which means its surface layers are depleted in iron peak elements. This may be due to the accretion of metal-poor circumstellar gas. It is the only known star which is simultaneously a Gamma Doradus variable, a Lambda Boötis type, and a Vega-like star (a star with excess infrared emission caused by a circumstellar disk).".
- HR_8799 thumbnail Benjamin_Zuckerman_HR_8799_planets_image_Dec._2010.jpg?width=300.
- HR_8799 wikiPageExternalLink image_feature_1320.html.
- HR_8799 wikiPageID "20198736".
- HR_8799 wikiPageLength "31292".
- HR_8799 wikiPageOutDegree "132".
- HR_8799 wikiPageRevisionID "678428784".
- HR_8799 wikiPageWikiLink A-type_main-sequence_star.
- HR_8799 wikiPageWikiLink A-type_main_sequence_star.
- HR_8799 wikiPageWikiLink Absorption_line.
- HR_8799 wikiPageWikiLink Accretion_(astrophysics).
- HR_8799 wikiPageWikiLink Adaptive_optics.
- HR_8799 wikiPageWikiLink Altair.
- HR_8799 wikiPageWikiLink Asteroseismology.
- HR_8799 wikiPageWikiLink Balmer_lines.
- HR_8799 wikiPageWikiLink Balmer_series.
- HR_8799 wikiPageWikiLink Bonner_Durchmusterung.
- HR_8799 wikiPageWikiLink Boss_General_Catalogue.
- HR_8799 wikiPageWikiLink Bright_Star_Catalogue.
- HR_8799 wikiPageWikiLink Brown_dwarf.
- HR_8799 wikiPageWikiLink Calcium.
- HR_8799 wikiPageWikiLink Carbon.
- HR_8799 wikiPageWikiLink Catalogues_of_Fundamental_Stars.
- HR_8799 wikiPageWikiLink Category:A-type_main-sequence_stars.
- HR_8799 wikiPageWikiLink Category:Circumstellar_disks.
- HR_8799 wikiPageWikiLink Category:Gamma_Doradus_variables.
- HR_8799 wikiPageWikiLink Category:HR_8799.
- HR_8799 wikiPageWikiLink Category:HR_objects.
- HR_8799 wikiPageWikiLink Category:Henry_Draper_Catalogue_objects.
- HR_8799 wikiPageWikiLink Category:Hipparcos_objects.
- HR_8799 wikiPageWikiLink Category:Lambda_Boötis_stars.
- HR_8799 wikiPageWikiLink Category:Objects_named_with_variable_star_designations.
- HR_8799 wikiPageWikiLink Category:Pegasus_(constellation).
- HR_8799 wikiPageWikiLink Category:Planetary_systems_with_four_confirmed_planets.
- HR_8799 wikiPageWikiLink Chandra_X-ray_Observatory.
- HR_8799 wikiPageWikiLink Chemical_element.
- HR_8799 wikiPageWikiLink Circumstellar_disk.
- HR_8799 wikiPageWikiLink Constellation.
- HR_8799 wikiPageWikiLink Corona.
- HR_8799 wikiPageWikiLink Debris_disk.
- HR_8799 wikiPageWikiLink Deuterium.
- HR_8799 wikiPageWikiLink Direct_imaging.
- HR_8799 wikiPageWikiLink Durchmusterung.
- HR_8799 wikiPageWikiLink Earth.
- HR_8799 wikiPageWikiLink Effective_temperature.
- HR_8799 wikiPageWikiLink Electromagnetic_radiation.
- HR_8799 wikiPageWikiLink Epoch_(astronomy).
- HR_8799 wikiPageWikiLink Europa_(moon).
- HR_8799 wikiPageWikiLink Exoplanet.
- HR_8799 wikiPageWikiLink Exoplanets.
- HR_8799 wikiPageWikiLink Extrasolar_planet.
- HR_8799 wikiPageWikiLink F-type_main-sequence_star.
- HR_8799 wikiPageWikiLink F-type_main_sequence_star.
- HR_8799 wikiPageWikiLink Fifth_Fundamental_Catalogue.
- HR_8799 wikiPageWikiLink Fomalhaut_b.
- HR_8799 wikiPageWikiLink GCVS.
- HR_8799 wikiPageWikiLink Galilean_moons.
- HR_8799 wikiPageWikiLink Galilean_satellites.
- HR_8799 wikiPageWikiLink Gamma_Doradus_variable.
- HR_8799 wikiPageWikiLink Ganymede_(moon).
- HR_8799 wikiPageWikiLink Gas_giant.
- HR_8799 wikiPageWikiLink Gemini_North.
- HR_8799 wikiPageWikiLink Gemini_Observatory.
- HR_8799 wikiPageWikiLink General_Catalogue_of_Variable_Stars.
- HR_8799 wikiPageWikiLink Gliese_876.
- HR_8799 wikiPageWikiLink HR_8799_b.
- HR_8799 wikiPageWikiLink HR_8799_c.
- HR_8799 wikiPageWikiLink HR_8799_d.
- HR_8799 wikiPageWikiLink HR_8799_e.
- HR_8799 wikiPageWikiLink Hale_Telescope.
- HR_8799 wikiPageWikiLink Hawaii.
- HR_8799 wikiPageWikiLink Henry_Draper_Catalogue.
- HR_8799 wikiPageWikiLink Henry_Draper_catalogue.
- HR_8799 wikiPageWikiLink Hertzsprung–Russell_diagram.
- HR_8799 wikiPageWikiLink Herzberg_Institute_of_Astrophysics.
- HR_8799 wikiPageWikiLink Hipparcos.
- HR_8799 wikiPageWikiLink Hipparcos_catalogue.
- HR_8799 wikiPageWikiLink Hubble_Space_Telescope.
- HR_8799 wikiPageWikiLink IAU.
- HR_8799 wikiPageWikiLink Infrared.
- HR_8799 wikiPageWikiLink Infrared_excess.
- HR_8799 wikiPageWikiLink Intensity_(physics).
- HR_8799 wikiPageWikiLink International_Astronomical_Union.
- HR_8799 wikiPageWikiLink International_Celestial_Reference_System.
- HR_8799 wikiPageWikiLink Inverse-square_law.
- HR_8799 wikiPageWikiLink Io_(moon).
- HR_8799 wikiPageWikiLink Iron_peak.
- HR_8799 wikiPageWikiLink J2000.0.
- HR_8799 wikiPageWikiLink Jet_Propulsion_Laboratory.
- HR_8799 wikiPageWikiLink Jupiter.
- HR_8799 wikiPageWikiLink Jupiter_mass.
- HR_8799 wikiPageWikiLink Kuiper_belt.
- HR_8799 wikiPageWikiLink Lambda_Boötis_star.
- HR_8799 wikiPageWikiLink Laplace_resonance.
- HR_8799 wikiPageWikiLink Light-year.
- HR_8799 wikiPageWikiLink Light-years.
- HR_8799 wikiPageWikiLink Light_year.
- HR_8799 wikiPageWikiLink List_of_extrasolar_planets.
- HR_8799 wikiPageWikiLink Lists_of_planets.
- HR_8799 wikiPageWikiLink Luminosity.