Ursa Minor (cave) Ursa Minor (cave) Ursa Minor Cave is part of Sequoia National Park, a naturally formed system of caves in California's Sierra Nevada. The cave was discovered in August 2006 by four cave explorers from the Cave Research Foundation who found a softball-sized hole on a cliff face in the mountains. After widening the hole to allow for human entry, the explorers discovered one of the most spectacular caves in the western United States. The cave has since been named "Ursa Minor," because of the large bear skeleton found in the cave. The cave was featured in the September 2007 issue
Ursa (Finland) include advancing amateur astronomy and astronomical education. They have also published a magazine "Tähdet ja avaruus" since 1971. Anyone can join Ursa for an annual fee. The organization has thirteen sections specialized in different aspects of amateur astronomy (and meteorology): In addition, Ursa has two loosely organized hobby groups: Ursa (Finland) Ursa Astronomical Association () is the largest astronomical association in Finland. Ursa was founded on 2 November 1921. Founding members include a renowned Finnish astronomer Yrjö Väisälä. In 1926 Ursa established the Ursa Observatory in Kaivopuisto district of Helsinki. In 2007 the Tähtikallio Observatory & Education Center was established