Mars and seasonal cycles of Mars are likewise similar to those of Earth, as is the tilt that produces the seasons. Mars is the site of Olympus Mons, the largest volcano and second-highest known mountain in the Solar System, and of Valles Marineris, one of the largest canyons in the Solar System. The smooth Borealis basin in the northern hemisphere covers 40% of the planet and may be a giant impact feature. Mars has two moons, Phobos and Deimos, which are small and irregularly shaped. These may be captured asteroids, similar to 5261 Eureka, a Mars trojan. There are ongoing investigations
Mount Olympus (Tasmania) the first work acquired by the gallery of an Australian-born artist. Another of Piguenit's Olympus paintings is held by the National Library of Australia. Nothofagus gunnii was first collected by Ronald Campbell Gunn in 1847 from Olympus. It is "Australia's only cold climate winter-deciduous tree", is found mainly in areas above 800 metres with rainfall of more than 1800mm, and is one of the plants that indicates Gondwana. Mount Olympus (Tasmania) Mount Olympus is a mountain in the Cradle Mountain-Lake St Clair National Park in Tasmania, Australia. It is the 24th highest mountain in Tasmania at above sea level and