If you're a fan of the sounds of space exploration -- rocket launches, space mission communications and the like -- then a "greatest hits" collection is just for you, courtesy of NASA.
The space agency has released an album on SoundCloud containing some of its most famous audio clips from past decades.
More than 60 items in MP3 format have been uploaded to NASA's SoundCloud account. The clips range from sounds of shuttle launches, the beeping of satellites, and astronaut recordings, from "Houston, we've had a problem" to "The Eagle has landed." The files are also available in the M4R (iPhone) format.
There are also sound clips of the solar system itself, with strange radio emissions from Saturn or the sound of lightning bolts on Jupiter.
The files, all in the public domain since they're the work of the U.S. government, can be used for a number of purposes, such as music samples or as notification sounds on a smartphone or PC, NASA said.
"You can hear the roar of a space shuttle launch or Neil Armstrong's 'One small step for [a] man, one giant leap for mankind' every time you get a phone call," the agency said.
"Or, you can hear the memorable words 'Houston, we've had a problem,' every time you make an error on your computer," it said.
The sound collection joins the wide-ranging picture library maintained by NASA, which is likewise available for free.
The sounds library is released just as Twitter debuts Audio Cards, which lets users embed audio clips into tweets.
Users of the NASA collection can browse sound clips put together in categories covering the history of NASA missions from Mercury, Gemini and Apollo to the Space Shuttle program and the International Space Station participation.
The library also includes a sound clip of President John F. Kennedy, who started it all with his "We choose the moon" speech in 1962.
