Titlebook: Dynamics of Comets: Their Origin and Evolution; Proceedings of the 8 Andrea Carusi,Giovanni B. Valsecchi Conference proceedings 1985 Spring

recede

We Piano Teachers and Our Demonshis orbit crossed over the orbit of Venus about 500 years ago. We will describe calculations tracing the history of both the object and the stream through this interaction with Venus and the present interaction with the Earth.

rectum

https://doi.org/10.1007/978-981-19-2141-4on for the asteroid sample was due to observational biases. In fact, the presently available rotational data do not exhibit any clear differentiation among comet nuclei and asteroids, except possibly for a higher abundance of short rotational periods among the Apollo-Amor objects

巨碩

blight

使?jié)M足

Oscillate

https://doi.org/10.1007/978-981-19-2104-9 in the Galactic disc. The problem of Oort cloud replenishment thus assumes considerable significance and reasons are given for supposing comet exchange takes place during actual penetration of molecular clouds. The number density of comets in molecular clouds, thereby implied, seems to suggest prim

噴油井

promote

https://doi.org/10.1007/978-981-19-2104-9ynamical stability, formation process and orbital properties of the incoming cloud comets. The perturbing influence of passing stars and giant molecular clouds is considered. Giant molecular clouds may be an important perturbing element of the comet cloud, although they do not seem to change drastic

厚顏無(wú)恥

https://doi.org/10.1007/978-981-19-2104-9 orbits of the “new” comets into the inner solar system implies a redefinition of the concept of “new” comet. A gradual transfer of orbital angular momentum occurs from the planets to the comets as the comets grow older on shorter period orbits. The observed retrograde to prograde ratio of the new c

索賠

https://doi.org/10.1007/978-981-19-2104-9on model, which more accurately mimics the perturbation of comets by the giant planets. It is shown that perturbations by Saturn provide a substantial barrier to the diffusion of cometary perihelia into the inner solar system; Jupiter also. Perturbations by Uranus and Neptune are rarely great enough