Earth and Space
Historical audio from Nasa missions has been uploaded to a free sound library, Soundcloud. Over 60 samples have been added and many of them are free to download and use in education. In addition to this there is a fantastic library of images to use in projects.
There is also a brilliant education page of topics that you an delve into with images, videos and audio to download in order to create your own podcasts, including Plant Growth, Robots and Recycling.
This really is a wonderful site and if you are doing any project work on space or have any students who are space mad, then this is the place to go!