Many organisations are littered with acronyms and while we use some daily, we often say them without knowing what they actually stand for.
Think BBC, AWOL, CIA, and the easier to remember, LOL and OMG.
When talking about space and planets, it's hard not to reference space agency NASA, but what do its initials stand for and what does the government body actually do?
Well, NASA stands for National Aeronautics and Space Administration. Easy to remember?
It is a U.S. government agency that is responsible for science and technology in relation to air and space.
They conduct masses of scientist research with astronauts in orbit, as well as hosting satellites in the sky to help scientists learn more about the planets, including Earth.
The agency study the solar system and look into new developments to improve air travel and other aspects of flight, and openly share their findings.
NASA helps teachers train students who are aspiring to be engineers, scientists, astronauts and other NASA workers by investing in programmes and activities to inspire both students and educators.
Their headquarters are based in Washington, D.C., but they have nine centres across several states housing 17,000 staff.
Formed in 1951, NASA were behind the Apollo 11 Moon landing project, which celebrates its 50th anniversary this summer on July 20.
On July 16, 1969, American astronauts Neil Armstrong, Michael Collins and Edwin "Buzz" Aldrin blasted off to the moon from Earth to successfully complete the 225,623-mile journey in four days to make history.
Commander Armstrong was the first to step on the Moon on July 20, 1969, with lunar module pilot "Buzz" following shortly after around 20 minutes later.
