If you want to learn more about Hanukkah, then here are some facts you probably didn’t know about the Jewish holiday: Hanukkah is the celebration of the rededication of the Second Temple in Jerusalem in the second century B.C. It is called Hanukkah, as this is the Hebrew word for dedication. When the Jewish rebels won the revolt, they had to burn a candelabra for eight days to rededicate the temple. They only had enough oil to burn it for one night, but amazingly, it lasted for eight days, so this is why the celebration lasts for eight days. There is traditionally no gift-giving on Hanukkah, but in recent years, some families have started giving gifts to one another. The National Menorah in Washington, D.C., is over 30 feet tall and is lit every year during Hanukkah. In 1993, Jeff Hoffman celebrated Hanukkah in space while on a mission to restore the Hubble Space Telescope.