Quadrant of Zero Energy Thermonuclear Assembly (ZETA)
1957
1957
1993
1986
1997
1923
1998
2021
1995
About 2009
1944
1950-1953
1890
860-825 BCE
1895-1905
1960-1970
2022
1800-1872
2014
1860
About 1890
2014
2022
before 1889
before 1889
2010
2022
1990-1991
2010
2022
1993
1980s
1998
1914
1923
1893
1925
1960-1970
1926-1932
1940
1997
mid-1800s
1959
1925
2023
1901-1911
About 1970
2022
before 1889
2021
2016