** 21656 Knuth, Asteroid

** 9344 Klopstock ( 1991 RB4 ), a Main-belt Asteroid discovered on 1991 by F. Borngen

** Superboy of Superboy's Legion: In this Elseworlds tale, the infant Kal-El is stranded in the Asteroid Belt, and he remains there, in stasis, until found in 2987 by R. J. Brande, a thousand years after Krypton's destruction.

** 6055 Brunelleschi ( 2158 T-3 ), a Main-belt Asteroid discovered in 1977

** Lincoln Near-Earth Asteroid Research

** Asteroid 2352 Kurchatov

** Asteroid 2734 Hašek named after Jaroslav Hašek

** Asclepius 21-29-another Hermetic treatise

** Multi-Agent Based modelling approaches capturing cellular events such as signalling, transcription and reaction dynamics

** one of the humanities – academic discipline that study the human condition, using methods that are primarily analytical, critical, or speculative, as distinguished from the mainly empirical approaches of the natural sciences.

** A Russian Tupolev 154 jetliner crashes into a mountain as it approaches the airport at Spitsbergen, Norway, killing all 141 people on board.

** Comet Ikeya-Seki approaches perihelion, passing 450, 000 kilometers from the sun.

** LLNL study compared projected costs of power from ICF and other fusion approaches to the projected future costs of existing energy sources.

** Structural genomics: Study of 3-dimensional structure of every protein encoded by a given genome using a combination of experimental and modeling approaches.

** The candidate must make at least one cross-country flight that is performed under IFR and transits a distance of at least 250 NM along airways or ATC-directed routing and includes an instrument approach at each airport so that a total of three different kinds of instrument approaches are performed.

** The Nasrid ruler, Mohammed ibn Alhamar, approaches Ferdinand III of Castile to propose that in return for cooperating in the conquest of Muslim Seville, Granada would be granted independence as a subject of Castile.

** Rural electrification and the Millennium Development Goals, Algorithmic approaches to rural electrification

** establish fuel and power pricing approaches

** International Mother Earth Day ( International )

** Episode 2: The Earth Explodes ( 1991 )

** Three Books of Known Space ( 1996 reprint of Tales of Known Space, with " Madness Has Its Place " in place of " The Borderland of Sol ", packed with World of Ptavvs and A Gift from Earth )

** The Green Hills of Earth ( 1947 ).

** Empire Earth: the last mission of the German campaign is to carry out Operation Sea Lion

** The Earth Will Shake ( 1982 )

** Cosmic Trigger II: Down to Earth ( 1992 )

** Ground track, the path on the surface of the Earth directly below an aircraft or satellite

** Department of Earth Sciences

** Bertrand Piccard and Brian Jones become the first to circumnavigate the Earth in a hot air balloon.

** The Super Dimension Fortress Macross ( 1982 – 1983 ): A huge spaceship appears high above Earth and crashes into an island in the Pacific, triggering a world war.

** The Comet Hale-Bopp makes its closest approach to Earth.

** Patricia Neal, American actress ( The Day The Earth Stood Still ) ( d. 2010 )

** Apollo program: Apollo 10 returns to Earth, after a successful 8-day test of all the components needed for the upcoming first manned Moon landing.

** Project Diana bounces radar waves off the Moon, measuring the exact distance between the Earth and the Moon, and proving that communication is possible between Earth and outer space, effectively opening the space age.

** Earth Day 20 is celebrated by millions worldwide.

** Vostok 1: Soviet cosmonaut Yuri Gagarin becomes the first human in space, orbiting the Earth once.

** Jacques Piccard and Don Walsh descend into the Mariana Trench in the bathyscaphe Trieste, reaching the depth of 10, 911 meters ( 35, 797 feet ) and become the first human beings to reach the lowest spot on Earth.

** Luna 20 comes back to Earth with 55 grams ( 1. 94 oz ) of lunar soil.

** The first Earth Day proclamation is issued by San Francisco Mayor Joseph Alioto.

** The USSR's Venera 7 becomes the first spacecraft to land successfully on Venus and transmit data back to Earth.

** Apollo program: Apollo 14 returns to Earth after the third manned Moon landing.

** Gemini 6 and Gemini 7 perform the first controlled rendezvous in Earth orbit.