July 04

1054 – A supernova is observed by the Chinese, the Arabs and possibly Amerindians near the star "Zeta Tauri." For several months, it remains bright enough to be seen during the day. Its remnants form what we call the "Crab Nebula."
1997 – NASA's Pathfinder space probe lands on the surface of Mars.
1998 – Japan launches the Nozomi probe to Mars, joining the United States and Russia as a space exploring nation.
2005 – The Deep Impact collider hits the comet "Tempel 1."
2012 – The discovery of particles consistent with the Higgs boson at the Large Hadron Collider is announced at CERN.