2004 in science

	… 1994; 1995; 1996; 1997; 1998; 1999; 2000; ; 2001; 2002; 2003; 2004; 2005; 2006; 2007; ; 2008; 2009; 2010; 2011; 2012; 2013; 2014 …;
	Art; Archaeology; Architecture; Literature; Music; Philosophy; Science +...;

The year 2004 in science had some important events, listed below.

Events[change | change source]

January 3 - NASA's Spirit rover lands on Mars.
January 24 - NASA's Opportunity rover lands on Mars.
March 2 - NASA says that the area where their Mars probe Opportunity landed shows unmistakable signs of contact with water in the geological past.
March 4 - NASA's Spirit finds proof of past contact with water in volcanic rocks on Mars.
April 20 - NASA launched the Gravity Probe B to test the general theory of relativity of Einstein.
October 27 - The Homo floresiensis has been discovered by Peter Brown, Michael Morwood and their colleagues.
September 13 - Astronomers from the European Southern Observatory announce images that seem to show a planet orbiting a brown dwarf about 230 light years away.
November 15 - The SMART-1 space probe reaches orbit around the Moon. It is the first European space mission to do so.