A cryovolcano is an icy volcano found on icy bodies, especially moons, in the outer solar system. Cryovolcanoes have been observed directly on Neptune's moon Triton, during a Voyager II fly-by in 1989, and on Saturn's moon Enceladus, by the Cassini probe on 27 November 2005.
The International Alliance of Women (IAW) is an international NGO comprising 41 member organizations involved in the promotion of womenâs human rights, of equality and of the empowerment of women.
The astronomical system of units, formally called the IAU (1976) System of Astronomical Constants, is a system of measurement developed for use in astronomy. It was adopted by the International Astronomical Union (IAU) in 1976, and has been significantly updated in 1994 and 2009 (see astronomical constant).