Definition
Ariel is one of the five big satellites of Uranus, and the closest to the planet. It was discovered by William Lassen in 1851. Its diameter is 1,160 km and its distance to Uranus is 191,000 km or 7.5 planetary radii. Its density is 1.66 g/cm3. Ariel has been explored by the Voyager 2 spacecraft which flew by the Uranian system in January 1986. Ariel is assumed to consist in about 30% silicates and 70% ices. It has a bright surface that shows a network of canyons and faults, such that, after Miranda, Ariel is the most geologically active among Uranus’ satellites. The longest canyon (622 km) is Kachina Chasmata. The activity may result from tidal heating due to the proximity of Uranus at the time of the satellite’s formation.
See also
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2011 Springer-Verlag Berlin Heidelberg
About this entry
Cite this entry
Encrenaz, T. (2011). Ariel. In: Gargaud, M., et al. Encyclopedia of Astrobiology. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-11274-4_105
Download citation
DOI: https://doi.org/10.1007/978-3-642-11274-4_105
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-11271-3
Online ISBN: 978-3-642-11274-4
eBook Packages: Physics and AstronomyReference Module Physical and Materials ScienceReference Module Chemistry, Materials and Physics