Pluto discovery glass plate. This glass plate shows several objects (circled) in the same region of the sky,one of a series of photographic plates obtained by US astronomer Clyde Tombaugh (1906-1997) in January 1930. This plate is the one obtained on 23 January. By comparing the plates and seeing which objects were moving relative to the background stars,Tombaugh was able to identify a new planet which was named Pluto. Pluto was redesignated a dwarf planet in 2006. This glass plate is among the exhibits held by the National Air and Space Museum at the Smithsonian Institution,Washington DC,USA | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / National Air and Space Museum, SMITHSONIAN INSTITUTION |
Bildgröße: | 5280 px × 4334 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |