In Ancient Rome, the Dog Days ran from July 24th through August 24thhttp://en.wikipedia.org/wiki/Dog_Days#The_dates
Simón Bolivar dayhttp://en.wikipedia.org/wiki/Sim%C3%B3n_Bolivar
Machu Picchu was rediscovered by the American historian Hiram Bingham on the 24th July 1911 http://en.wikipedia.org/wiki/Machu_Picchu#History
The Gran Telescopio Canarias formally opened its shutters on July 24, 2009http://en.wikipedia.org/wiki/Gran_Telescopio_Canarias#Inauguration_ceremony
Battle of Harlaw, 24 July 1411http://astronomy.activeboard.com/t43047233/the-battle-of-harlaw/
Operation Gomorrah, was a campaign of air raids on Hamburg beginning 24 July 1943http://en.wikipedia.org/wiki/Bombing_of_Hamburg_in_World_War_II#Battle_of_Hamburg
The 1st Bumper V-2 Rocket was launched from Cape Canaveral in 1950http://apod.nasa.gov/apod/ap081001.htmlThe GEOTAIL satellite was launched by a Delta II rocket on July 24, 1992.http://en.wikipedia.org/wiki/GEOTAILFragments of an Ariane-1 H-10 upper-stage booster hit the Cerise microsatellite on 24 July 1996http://en.wikipedia.org/wiki/Cerise_(satellite)The Soviet Kosmos 1275 satellite disintegrated on 24 July 1981http://astronomy.activeboard.com/t44863129/kosmos-1275/
Boris Nikolayevich Belousov (24 July 1930 Khotimsk, Mogilev - 27 June 1998) was a Soviet cosmonauthttp://en.wikipedia.org/wiki/Boris_Nikolayevich_BelousovAmelia Mary Earhart (July 24, 1897 - disappeared July 2, 1937) was an American aviation pioneerhttp://en.wikipedia.org/wiki/Amelia_EarhartCharles Emile Picard FRS (24 July 1856 - 11 December 1941) was a French mathematician.http://en.wikipedia.org/wiki/Charles_%C3%89mile_PicardFrancis Edwin Close OBE (born 24 July 1945) is a noted particle physicist http://astronomy.activeboard.com/t50141164/francis-edwin-close/Henry Emil Kandrup (July 24, 1955 - October 18, 2003) was an American astrophysicist http://en.wikipedia.org/wiki/Henry_KandrupHugh Norman Ross (born July 24, 1945) is a Canadian American astrophysicisthttp://en.wikipedia.org/wiki/Hugh_Ross_(creationist)Adolf Overweg (July 24, 1822 - September 27, 1852) was a German geologist, astronomerhttp://en.wikipedia.org/wiki/Adolf_OverwegJoseph Nicolas Nicollet (July 24, 1786 - September 11, 1843) was a French geographer, astronomerhttp://en.wikipedia.org/wiki/Joseph_NicolletPaolo Pizzetti (July 24, 1860 - April 14, 1918) was an Italian geodesist, astronomerhttp://en.wikipedia.org/wiki/Paolo_PizzettiHenri Alexandre Deslandres (July 24, 1853 - January 15, 1948) was a French astronomerhttp://en.wikipedia.org/wiki/Henri-Alexandre_DeslandresSir William de Wiveleslie Abney (24 July 1843 - 3 December 1920) was an English astronomer http://en.wikipedia.org/wiki/William_de_Wiveleslie_AbneyGustav Andreas Tammann (born 24 July 1932) works in the Field of Astronomyhttp://en.wikipedia.org/wiki/Gustav_Andreas_Tammann
Marvin the Martian made his debut on Looney Tunes on the 24th July 1948.https://en.wikipedia.org/wiki/Haredevil_Hare
The speaking clock service was first introduced in Britain on July 24, 1936.http://astronomy.activeboard.com/t44063055/the-speaking-clock/
NGC 6138 was rediscovered by Edouard Stephan on the 24th July 1879 and relisted as NGC 6363.http://astronomy.activeboard.com/t58140078/ngc-6138/Messier 54 was discovered by French astronomer Charles Messier on the 24th July 1778.http://astronomy.activeboard.com/t46040064/messier-54/Messier 55 was observed by Charles Messier in Paris, France on the 24th July 1778http://astronomy.activeboard.com/t49087200/messier-55/
NGC 6582 was discovered by Lewis A. Swift on the 24th July 1884.http://astronomy.activeboard.com/t63556684/ngc-6582/NGC 6887 was discovered by British astronomer John Herschel on the 24th July 1835. http://astronomy.activeboard.com/t58140035/ngc-6887/NGC 6899 was discovered by British astronomer John Herschel on the 24th July 1835. http://astronomy.activeboard.com/t58140026/ngc-6899/NGC 6915 was discovered by German astronomer Albert Marth on the 24th July 1863.http://astronomy.activeboard.com/t58140016/ngc-6915/NGC 6922 was discovered by German astronomer Albert Marth on the 24th July 1863.http://astronomy.activeboard.com/t58140004/ngc-6922/NGC 6948 was discovered by British astronomer John Herschel on the 24th July 1835. http://astronomy.activeboard.com/t58139990/ngc-6948/
NGC 7123 was discovered by John Herschel on the 24th July 1835.http://astronomy.activeboard.com/t61249747/ngc-7123/NGC 7655 was discovered by British astronomer John Herschel on the 24th July 1835. http://astronomy.activeboard.com/t58139973/ngc-7655/
On July 24, 2009, the star MOA-2009-BLG-387L eclipsed a background star in a microlensing eventhttp://en.wikipedia.org/wiki/MOA-2009-BLG-387L#Observational_historyComet 20D/Westphal was discovered by the German astronomer J. G. Westphal on July 24, 1852.https://en.wikipedia.org/wiki/20D/Westphal
The Chiles-Whitted UFO encounter occurred on July 24, 1948 in the skies near Montgomery, Alabamahttp://en.wikipedia.org/wiki/Chiles-Whitted_UFO_encounterA fireball was reported to have passed over the general area of Socorro, New Mexico, on July 24, 1949http://astronomy.activeboard.com/t58139837/fireball-of-july-24-1949/
MeteoritesThe Barbotan (H5 chondrite) meteorite fell in Aquitaine, France, on the 24th July 1790.http://astronomy.activeboard.com/t44062921/barbotan-meteorite/The Gross-Divina (H5 chondrite) meteorite fell in Stredoslovensky, Slovakia, on the 24th July 1837.http://astronomy.activeboard.com/t44062929/gross-divina-meteorite/The Gifu (L6 chondrite) meteorite fell in Chubu, Japan, on the 24th July 1909.http://astronomy.activeboard.com/t44062934/gifu-meteorite/The Parambu (LL5 chondrite) meteorite fell in Ceara, Brazil, on the 24th July 1967.http://astronomy.activeboard.com/t44063111/parambu-meteorite/