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Hace 7 horas · Nachdem Ejnar Hertzsprung in Potsdam 1913 die Periode-Leuchtkraft-Beziehung mit der Parallaxen-Methode erstmals grob zu eichen vermochte, war der Weg frei zur Messung immer größerer kosmischer Distanzen. Shapley verbesserte den Ansatz und entdeckte daraufhin 1918, dass die Milchstraße viel größer ist als bis dahin angenommen.
Hace 3 días · In 1909, Ejnar Hertzsprung was the first to suggest that Sirius was a member of the Ursa Major Moving Group, based on his observations of the system's movements across the sky. The Ursa Major Group is a set of 220 stars that share a common motion through space.
Hace 5 días · Ultraviolet: general, stars, galaxies – Galaxies: active – Stars: Hertzsprung-Russell and C-M diagrams, white dwarfs 1. Introduction The study of the time variable sky has historically been a key area in astronomy. The characterization of planet movements and the light emitted by distant supernovae, for example, have
Hace 2 días · When did Ejnar Hertzsprung and Henry Russell develop the first Hertzsprung-Russell diagram? Answer: 1910-1913 In 1910 Hertzsprung noticed an interesting pattern in the Henry Draper Catalog of stars compiled in the late 19th century at Harvard University.
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Hace 5 días · Abstract. We present photometric and spectroscopic datasets for SN 2020pvb, a Type IIn-P supernova (SN) that is similar to SNe 1994W, 2005cl, 2009kn, and 2011ht, with a precursor outburst detected (PS1 w band ∼–13.8 mag) around four months before the B -band maximum light.
Hace 3 días · Betelgeuse, α Ori, 58 Ori, HR 2061, BD +7°1055, HD 39801, FK5 224, HIP 27989, SAO 113271, GC 7451, CCDM J05552+0724, AAVSO 0549+07. Database references. SIMBAD. data. Betelgeuse is a red supergiant star in the constellation of Orion. It is usually the tenth-brightest star in the night sky and, after Rigel, the second-brightest in its ...
Hace 4 días · Type Ia supernova. explosive variable star. supernova, any of a class of violently exploding stars whose luminosity after eruption suddenly increases many millions of times its normal level. The term supernova is derived from nova (Latin: “new”), the name for another type of exploding star. Supernovae resemble novae in several respects.
