منابع مشابه
A Deep Search for Additional Satellites around the Dwarf Planet Haumea
Haumea is a dwarf planet with two known satellites, an unusually high spin rate, and a large collisional family, making it one of the most interesting objects in the outer solar system. A fully self-consistent formation scenario responsible for the satellite and family formation is still elusive, but some processes predict the initial formation of many small moons, similar to the small moons re...
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The recent discovery of two distant satellites of Uranus suggests that there could be similar bodies orbiting Neptune. Previous surveys for distant satellites of Neptune have had relatively bright magnitude limits (B J ' 20:5) and would have missed satellites with magnitudes and colours similar to the 2 recently discovered Uranian satellites (R 20:4 and R 21:9). We have searched for satellites ...
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An interesting feature of the giant planets of our solar system is the existence of regions around these objects where no irregular satellites are observed. Surveys have shown that, around Jupiter, such a region extends from the outermost regular satellite Callisto to the vicinity of Themisto, the innermost irregular satellite. To understand the reason for the existence of such a satellite–void...
متن کاملTesting Modified Gravity with Motion of Satellites around Galaxies
A modified gravity (MOG) theory, that has been successfully fitted to galaxy rotational velocity data, cluster data, the Bullet Cluster 1E0657-56 and cosmological observations, is fitted to the motion of satellite galaxies around host galaxies at distances 50-400 kpc providing a new sensitive test for MOG. We show that observational data from the Sloan Digital Sky Survey are consistent with MOG...
متن کاملA Search for a Sodium Atmosphere around Ganymede
Long-slit high-resolution spectra have revealed that Ganymede has an atmospheric sodium column density, between a distance of 7800 and 15600 km from the satellite surface, of less than 1 10 8 atoms cm ?2 , a factor of 13 times smaller than the sodium density in the atmosphere of Europa at the same distance. Assuming similar processes creating sodium on both Europa and Ganymede, we estimate that...
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ژورنال
عنوان ژورنال: The Astronomical Journal
سال: 2011
ISSN: 0004-6256,1538-3881
DOI: 10.1088/0004-6256/141/6/197