It's about the number of Beatles Songs.
It's about the number of Vertebrae in a Snake's Body.
It's about the number of Manned Flights to Space.
In other words, the count of a Manned Flights to Space is 1.01 times 309.(2016 figures) (flights with at least 80km altitude; US, Russia, the Soviet Union, and China)
Since the flight of the Vostok 1 in April, 1961, there have been a total of 312 manned spaceflights under the American, Russian, Soviet, and Chinese space programs. Furthermore, the space programs of the US, Russia, the Soviet Union, France, Argentina, and Iran have launched a total 32 monkeys (specifically rhesus, cynomolgus, and squirrel monkeys, macaques, chimpanzees) into space.
It's about one-and-one-tenth times the number of Professional Baseball Teams in the United States.
In other words, 309 is 1.12 times the count of Professional Baseball Teams in the United States, and the count of Professional Baseball Teams in the United States is 0.893 times that amount.(2016 figures) (includes Major, Minor, and Independent Leagues)
Nicknamed "America's pastime," there are 276 professional baseball teams in the United States (across all levels of play). Major League Baseball — the league with the highest level of professional play — drew more than 74 million spectators at gmes in 2013.
It's about nine-tenths the number of Sesame Seeds on a Big Mac bun.
In other words, 309 is 0.88 times the count of Sesame Seeds on a Big Mac bun, and the count of Sesame Seeds on a Big Mac bun is 1.1 times that amount.(McDonald's sandwich; approximate figures)
Each McDonald's Big Mac crown bun contains about 350 sesame seeds. McDonald's serves about 1.57 million Big Macs to its customers each day.
It's about one-and-one-tenth times the number of Words in the Gettysburg Address.
In other words, 309 is 1.14 times the count of Words in the Gettysburg Address, and the count of Words in the Gettysburg Address is 0.877 times that amount.(Bliss text)
Lincoln's Gettysburg Address, delivered November 19, 1863, at the postwar dedication of the Soldiers' National Cemetery in Gettysburg, Pennsylvania, lasted just over two minutes and contained an estimated (the exact wording of the original speech is disputed) 272 words. Lincoln wrote five (5) drafts of the speech, which are known today by the last names of the original recipients.
It's about one-and-a-half times the number of Bones in the Human Body.