Based on the data of nuclear reaction ratederived by the progress in the nuclear experiment in recent years, it is pointed out thatall these models might fail to provide the important astrophysical sources of interstellar26A1 as there are some severe difficulties.
The most important international conference on asteroid during the recent years, "Asteroids 2001: from Piazzi to the 3rd millennium" was held in Palermo, Italy, during June 11~16, 2001. Most of the conventioneers were experts in different directions of minor planet study.
2001年6月 11～16日在意大利巴勒莫召开了小行星领域近 10年来最重要的一次专业会议“小行星 2001－从皮亚齐到第 3个千年”（Asteroids 2001：from Piazzi to the 3rd millennium）国际学术研讨会，与会者几乎涵盖了小行星研究领域内各个方面的专家。
Firsf of all, a statistics is made to the frequency of observational programs in terms of celestial abjects in the period of last 12 years (1980-1992) for the National Radio Astronomy Observatory 12-m millimetre telescope, U.S.A.
In this article, we briefly review the ground-based and space observations of magnetic transient changes related to solar flares in the last two decades, and give a possible explanation based on non-LTE line profile calculations.
In the last decade, with the observations of high resolutions, the developments of theoretical models and numerical simulations, there has been great progress in many aspects of the studies of high-velocity clouds, particularly for some special kinds and the all-sky surveys.