comets frequently
61Creation science — or scientific creationism is a movement within creationism which attempts to use scientific means to disprove the accepted scientific theories on the history of the Earth, cosmology and biological evolution and prove the Genesis account of… …
62Deuterium — Hydrogen 2 Full table General Name, symbol deuterium, 2H or D Neutrons 1 …
63History of astronomy — History of science …
64Isaac Newton — Sir Isaac Newton …
65Tycho Brahe — This article is about the astronomer Tycho Brahe. For other uses, see Tycho Brahe (disambiguation). Tycho Ottesen Brahe Born 14 December 1546 Knutstorp Castle, Scania Died 24 October 1601 (age …
66Tunguska event — The Tunguska Event, or Tunguska explosion, was a powerful explosion that occurred near the Podkamennaya (Lower Stony) Tunguska River in what is now Krasnoyarsk Krai of Russia, at around 7:14 a.m. [P. Farinella, L. Foschini, Ch. Froeschl eacute;,… …
67Tau Ceti — Starbox begin name=Tau Ceti Starbox image caption=Tau Ceti (highlighted center) in the southern part of the constellation Cetus. Starbox observe epoch=J2000 constell=Cetus ra=RA|01|44|04.0829cite web url=http://simbad3.u strasbg.fr/sim… …
68Venus — This article is about the planet. For other uses, see Venus (disambiguation). Venus   …
69Clathrate hydrate — Clathrate hydrates (or gas clathrates, gas hydrates, clathrates, hydrates, etc.) are crystalline water based solids physically resembling ice, in which small non polar molecules (typically gases) or polar molecules with large hydrophobic moieties …
70Happy Days — This article is about the television series. For other uses, see Happy Days (disambiguation). Happy Days Main title screen (seasons 1 10) Also known as Happy Days Again Genre Sitcom …
