科学史评话最新专辑
科学史评话科学史评话最新专辑
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| Publishes | Weekly | Episodes | 575 | Founded | 9 years ago |
|---|---|---|---|---|---|
| Language |  ZH-CN | Number of Listeners | Categories | Natural SciencesEducationScience |
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月船3号探测器绕着月球飞了十几天。8月17号，维克拉姆着陆器和月船3号轨道舱分离，开始着陆过程。远程遥控完全是由设在印度班加罗尔的控制中心指挥的。一开始先是开发动机减速，维克拉姆着陆器开始逐渐降低高度。等到23号，着陆器的近月点高度已经下降到了30公里，就趁着这个机会，维克拉姆着陆器开发动机反推，经过反推减速，轨道再次改变，现在的这个轨道和月球表面是有交叉点的，也就是说它一定会落到月球表面上。经过11.4分钟的减速，着陆器已经下降到了7.4公里的高度，在这个高度上。维克拉姆着陆器悬停了一下，然后... more
印度人也是按照先绕后落的顺序计划的。那么好了，下一步就是派探测器可控着陆，而不是撞上去。于是有了月船2号，这家伙就携带着一个着陆器，还带了一个小的月球车。当然，这个月球车很小，只有27公斤重，电源功率只有50瓦。相比之下玉兔号就大了不少，足有136公斤。这东西依然是国际合作的产物。本来印度和俄国人合作，月球车和着陆器是俄国人去做，拉沃契金设计局曾经干过这种事，按理说是不难。不过后来俄国人退出了，没办法，这个探测器还得印度人自己来。另外，着陆到月球表面，离不开深空测控网络，印度人虽然也建造了几个大... more
现在一个棘手的问题就摆在大家面前，龙江1号和2号的硬件基本相同，程序软件也差不多，如果龙江1号的软硬件存在bug，那么龙江2号也应该有。如果让龙江2号也开发动机变轨，很有可能也飞丢了。你要是不开发动机变轨，这颗探测器就无法进入地月转移轨道，根本去不了月球了。这时候哈工大的团队和地面测控人员陷入进退两难的地步。那么，龙江1号是怎么丢的？唯一的线索就是断联之前传回的最后一点日志数据。根据这点数据，大家发现，似乎最后时刻，龙江1号的转速在变快。很有可能，就是那个5牛顿的发动机没有关机造成的。那么好了，... more
2018年5月21日，鹊桥中继卫星由长征四号丙火箭发射后，先进入地月转移轨道，中间飞行了大概4天。星箭分离以后，先是太阳电池板展开，然后就是抛物面天线顺利解锁展开，卫星建立了正常飞行姿态。从地球飞往月球的过程持续了大概4天。5月25日，鹊桥中继卫星在距离月面100公里的地方实施近月制动，四台20牛顿的轨控发动机点火912s后，正常关机，进入月球到L2点的转移轨道。前前后后，经过5次精准轨道控制，6月14日，鹊桥最终成功进入到了围绕L2点的晕轮轨道，成为世界首颗运行在地月L2点晕轮轨道上的航天器。... more
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Reviews
- 史评话
科普只是背层，说书闲谈才是内核
Apple Podcasts5T35护航队China6 months ago - 不错
内容很好👍也很丰富
Apple Podcasts5fvvfvfvdcsdsdwfcdcd
United States2 years ago - 好
能不能讲一下武器
Apple Podcasts5ksjdkekkdkkfkChina2 years ago - 🐂批
太🐃🐂批了，听了五年了，百听不一厌。
Apple Podcasts5鹰眼航拍看中国🇨🇳China2 years ago - hao
日本太平洋战争讲的我学到了很多，配合天书的英帕尔战役来听更好。
Apple Podcasts5爱奇异China3 years ago
Chart Rankings
How this podcast ranks in the Apple Podcasts, Spotify and YouTube charts.
Apple Podcasts | #84 | United States/Science/Natural Sciences |
Apple Podcasts | #73 |  France/Science/Natural Sciences |
Apple Podcasts | #112 |  Italy/Science/Natural Sciences |
Apple Podcasts | #199 |  Australia/Science/Natural Sciences |
Apple Podcasts | #3 |  Hong Kong/Science/Natural Sciences |
Apple Podcasts | #5 | China/Science/Natural Sciences |
Audience Metrics
Listeners, social reach, demographics and more for this podcast.
| Listeners per Episode | Gender Skew | Location | |||
|---|---|---|---|---|---|
| Interests | Professions | Age Range | |||
| Household Income | Social Media Reach | ||||
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科学史评话最新专辑 launched 9 years ago and published 575 episodes to date. You can find more information about this podcast including rankings, audience demographics and engagement in our podcast database.
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