History of Physics and Astronomy

This version sorts the important events by name. The lifetimes of people are highlighted in blue, important people are in bold blue.

H

H bomb – Edward Teller USA 1952
H bomb - USSR 1953
H bomb – USA – trawler Lucky Dragon 1954
Hahn 1879-1968
Haidinger fringes 1849
Half wave plate - Laurent 1874
Halley's comet observed – Johannes Regiomontanus 1472
Halley 1656-1742
Halley's comet – predicts return 1705
Halley's comet returns 1910
Hampson and Linde process 1895
Harrison (grid iron pendulum)1693-1776
Heat death of the universe - Hermann von Helmholtz 1854
Heisenberg – Nobel prize for Physics 1932
Helicopter deign – Leonardo da Vinci 1510
Helium – name for the new element 1871
Helium identified and named in the Sun's spectrum - Joseph Lockyer 1868
Helium lines observed in the Sun's spectrum - Pierre-Jules Janssen 1868
Helium discovered in solar spectrum – Lockyer (?1868)1878
Helium isolated 1895
Helium liquefied – Kammerlingh Onnes – 0.7K 1908
Helium solidified – Keesom 1926
Helmholtz 1821-1894
Henry 1799- 1878
Herchel's 49" reflector completed 1789
Hero of Alexandria 200 BC
Herschel 1738-1822
Herstmonceux 98" reflector completed 1966
Herstmonceux 98" reflector opened 1967
Hertz 1857-1894
Hertzsprung-Russel diagram finalised 1913
High temperature superconductivity – Bednorz and Mueller 1986
High voltage generator – Cockcroft and Walton 1932
Hiroshima – nuclear bomb 1945
Holography – Gabor 1949
Holograms – first successful ones produced 1963
Hooke 1635-1703
Hooke's law published 1676
Hope's apparatus – liquid expansion 1804
Horse power as a unit of power - Watt 1785
Hot air balloon - Montgolfier 1783
Hovercraft – first model version 1956
Hubble 1889-1953
Hubble's Law 1929
Hubble Space telescope launched 1990
Hubble Space telescope repaired 1993
Huggins 1824- 1910
Human race appears 100 000 BC
Hunterston nuclear power station opened 1964
Huygens' principle 1665
Huyghens 1629-1695
Huyghens probe launched from Cassini space craft lands safely on Titan 2005
Hydrogen – isolation by Cavendish 1766
Hydrogen observed in the sun - Anders Angstrom 1862
Hydrogen liquefied - Dewar 1898
Hydrogen solidified - Dewar 1899