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M2-42
Minkowski 2-42, abbreviated M2-42, is a planetary nebula that was discovered by Rudolph Minkowski in 1947. It is located about 30,800 light-years away from Earth in the Galactic bulge. It is known to be a bipolar nebula, bipolar planetary nebula containing two jets of material emerging from both sides of its white dwarf, central star. It has been found that its bipolar outflows have the typical features of Fast Low-Ionization Emission Region (FLIER). The central star of M2-42 is classified as ''weak emission-line star'', but its nitrogen and helium features may be linked to nitrogen sequences of Wolf-Rayet stars, Wolf-Rayet central stars of planetary nebula ([WN]). The chemical composition of this planetary nebula was found to be around the solar metallicity. See also * List of largest nebulae * Lists of nebulae References Planetary nebulae Sagittarius (constellation) {{Nebula-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rudolph Minkowski
Rudolph Minkowski (born Rudolf Leo Bernhard Minkowski ; ; May 28, 1895 – January 4, 1976) was a German-American astronomer. Biography Minkowski was the son of Marie Johanna Siegel and physiologist Oskar Minkowski. His uncle was Hermann Minkowski, a mathematician and one of Einstein's teachers in Zürich. Rudolph studied supernovae and, together with Walter Baade, divided them into two classes ( Type I and Type II) based on their spectral characteristics. He and Baade also found optical counterparts to various radio sources. He headed the National Geographic Society – Palomar Observatory Sky Survey, a photographic atlas of the entire northern sky (and down to declination -22°) up to an apparent magnitude of 22. Together with Albert George Wilson, he co-discovered the near-Earth Apollo asteroid 1620 Geographos in 1951, and he also discovered Planetary Nebula M2-9. He additionally discovered a correlation between the luminosity of early-type galaxies and their veloci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
