January 12 - Comet C/2006 P1 (McNaught) reaches perihelion and becomes visible during daylight.
February 28 - The New Horizons space probe makes a gravitational slingshot against Jupiter to change its trajectory towards Pluto.
Time lapse movie of the 3 March 2007 lunar eclipse
March 3-March 4 - A total lunar eclipse occurs, visible in some parts of the Americas and Asia, and all of Europe and Africa.
March 19 - A partial solar eclipse occurs, visible in Asia.
April 10 - Spectroscopic analysis of HD 209458 b, an extrasolar planet, provides the first evidence of atmospheric water vapor beyond the Solar System.
April 25 - Gliese 581 c is discovered and identified as a potentially habitable Earth-like extrasolar planet in the constellation Libra.
June 5 - NASA's MESSENGER spacecraft makes its second flyby of Venus en route to Mercury.
August 28 - A total lunar eclipse occurs, visible in some parts of the Americas and Asia, and all of Australasia and the Pacific Ocean.
September 11 - A partial solar eclipse occurs, visible in southern areas of South America.
September 27 - NASA's Dawn spacecraft is launched.
October 24 - Comet 17P/Holmes suddenly brightens from 17 to about 2.8 magnitude.
April 27 - US researchers have simulated half a virtual mouse brain on a supercomputer.
January 14 - Scientists at the Roslin Institute announce they have genetically engineered chickens which can lay eggs with the ability to fight cancer.
Philosophy of science
Publication of Nassim Nicholas Taleb's book The Black Swan: the Impact of the Highly Improbable, discussing the "Black swan theory"
^ "Mouse brain simulated on computer". BBC News. April 27, 2007.
^ "Anti-cancer chicken eggs produced". BBC News. 2007-01-14.
February 20 - Frank Albert Cotton (b. 1930), chemist known for his research on transition metal chemistry
July 7 - Dame Anne McLaren (b. 1927), developmental biologist.
July 23 - Ernst Otto Fischer (b. 1918), Nobel Prize laureate for pioneering work in the area of organometallic chemistry.
October 26 - Arthur Kornberg (b. 1918), Nobel Prize laureate for his discovery of the mechanisms in the biological synthesis of deoxyribonucleic acid.
Chemistry to Gerhard Ertl "for his studies of chemical processes on solid surfaces"
Physiology or Medicine to Mario R. Capecchi, Sir Martin J. Evans and Oliver Smithies "for their discoveries of principles for introducing specific gene modifications in mice by the use of embryonic stem cells"