Daily Extra :
Astronomy & Space Word of The Day
Bolide : a very bright meteor (or fireball) that produces a sonic boom.
Today in History:
1496: [link urk=http://space.about.com/library/weekly/aa022603a.htm]Nicolaus Copernicus entered the University of Bologna.
1967: Mariner 5 - USA Venus Flyby - 244 kg - (June 14 to November, 1967) arrived at Venus, one day after Venera 4. It passed within 3,900 kilometers of the planet's surface. It studied the Venusian magnetic field and found that its atmosphere was composed of 85-99% carbon dioxide. It is now in a solar orbit.