National Academy Press, 2001
Buku Teks
Pasachoff, Jay M., author
Thomson, 2001
Buku Teks
Shaffer, Rick, author
Gramercy Books, 1994
Buku Referensi
Chaisson, Eric, author
Prentice-Hall, 1999
Buku Referensi
Lembaga Penerbangan dan Antariksa Nasional,
Majalah, Jurnal, Buletin