comet
A comet is an icy, small Solar System body that warms and begins to release gases when passing close to the Sun, a process called outgassing. This produces an extended, gravitationally unbound atmosphere or Coma (cometary), coma surrounding ...
s named Schwassmann–Wachmann, the discovery of which is co-credited to German astronomers
Arnold Schwassmann
Friedrich Karl Arnold Schwassmann (25 March 1870 – 19 January 1964) was a German astronomer and a discoverer of 22 minor planets and 4 comets, who worked at Astrophysical Institute Potsdam#Foundation of the Astrophysical Observatory Potsdam .28 ...
and
Arno Arthur Wachmann
Arno Arthur Wachmann (8 March 1902 – 24 July 1990) was a German astronomer and discoverer of comets and minor planets, who worked for many years at the Bergedorf Observatory in Hamburg.29P/Schwassmann–Wachmann (29P/1927 V1, Schwassmann–Wachmann 1)
* 31P/Schwassmann–Wachmann (31P/1929 B1, Schwassmann–Wachmann 2)
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73P/Schwassmann–Wachmann
73P/Schwassmann–Wachmann, also known as Schwassmann–Wachmann 3 or SW3 for short, is a periodic comet that has a 5.4 year orbital period and that has been actively Comet#Breakup and collisions, disintegrating since 1995. When it came to perihe ...