How do the small planetary satellites rotate?
نویسندگان
چکیده
منابع مشابه
How do the planetary satellites rotate?
On the basis of tidal despinning timescale arguments, Peale showed in 1977 that the majority of irregular satellites (with unknown rotation states) are expected to reside close to their initial (fast) rotation states. Here we investigate the problem of typical rotation states among satellites from a viewpoint of dynamical stability. We explore location of the known planetary satellites on the “...
متن کاملDo Clusters of Galaxies Rotate?
It is shown that the number of members, NA, and the linear radius of the Abell clusters at z < 0.18 increase with redshift. The increase is caused by observational selection: the number of rich and large clusters is small in the nearby small volume of space, while poor and small clusters are not detected at high distances. Besides, the numbers of clusters with different ellipticities are about ...
متن کاملHow to Rotate a Camera
A procedure is proposed that, given any rotatingdevice to support a camera, places the camera’s center of projection to within a tenth of a millimeter from the axis of the rotating device, even with wide angle lenses with severe distortion. Results are experimentally validated by checking that all the camera projection centers as computed through an off-theshelf calibration method are at the sa...
متن کاملHow dynein and microtubules rotate the nucleus.
In living cells, a fluctuating torque is exerted on the nuclear surface but the origin of the torque is unclear. In this study, we found that the nuclear rotation angle is directionally persistent on a time scale of tens of minutes, but rotationally diffusive on longer time scales. Rotation required the activity of the microtubule motor dynein. We formulated a model based on microtubules underg...
متن کاملPlanetary Satellites, Asteroids, Comets and Meteors
Asteroids, mainly rocky or metallic bodies in the inner solar system, orbit the Sun in various distinct populations (planet-crossers, main-belt asteroids, trans-Neptunian Edgeworth-Kuiper belt objects, Centaurs in the outer planetary region) between which there are transfers over substantial timescales. For example the main belt is the main reservoir replenishing the Earth-crossing asteroids, t...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Proceedings of the International Astronomical Union
سال: 2009
ISSN: 1743-9213,1743-9221
DOI: 10.1017/s1743921310001705