NasaSpaceflight 的 Starship SN15 发射直播已经开始，目前预计美国时间下午（北京时间凌晨）发射。
https://www.youtube.com/watch?v=rXG7W7skekw
https://www.youtube.com/watch?v=rXG7W7skekw
YouTube
SCRUB: Starship SN15 Test Flight Scrubbed
SpaceX is performing a test flight of Starship SN15. The prototype will aim to be the first Starship vehicle to softly land during a high altitude flight test. Like the previous Starship prototypes, SN15 is expected to fly to approximately 10 kilometers.…
https://twitter.com/planet4589/status/1388167774346821632?s=200
天和号核心舱经历了数次升轨，而轨道上的长征五号芯级的轨道正在缓慢衰减。
天和号核心舱经历了数次升轨，而轨道上的长征五号芯级的轨道正在缓慢衰减。
Twitter
Jonathan McDowell
Maybe this is clearer, although more cluttered: instead of average height, here are perigee and apogee height separately. I except further Tianhe orbit raising in the next couple of days.
Forwarded from 口呆唔咔
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Forwarded from Solidot
NASA 暂缓 SpaceX 的 29 亿美元月球登陆舱合同
2021-05-01 10:40 #NASA
上个月，SpaceX 打败了 Jeff Bezos 的 Blue Origin 和国防承包商 Dynetics 赢得了NASA 的 29 亿美元的月球登陆舱合同。NASA 原计划在初始阶段选择三家公司，然后再从中选择两家公司去建造月球登陆舱，此举旨在维持一个竞争环境，确保一家出现意外后还有替代。但 NASA 以预算不足为由只选择了 SpaceX 一家公司去建造登陆舱，Blue Origin 和 Dynetics 随后向美国政府问责办公室投诉了这一决定，Blue Origin 指责 NASA 不公平的在最后一分钟改变方案，而只选择 SpaceX 将会危及到 2024 年载人登月的时间表。在政府问责办公室投解决所有未决诉讼前，NASA 通知 SpaceX 暂缓合同履行。
2021-05-01 10:40 #NASA
上个月，SpaceX 打败了 Jeff Bezos 的 Blue Origin 和国防承包商 Dynetics 赢得了NASA 的 29 亿美元的月球登陆舱合同。NASA 原计划在初始阶段选择三家公司，然后再从中选择两家公司去建造月球登陆舱，此举旨在维持一个竞争环境，确保一家出现意外后还有替代。但 NASA 以预算不足为由只选择了 SpaceX 一家公司去建造登陆舱，Blue Origin 和 Dynetics 随后向美国政府问责办公室投诉了这一决定，Blue Origin 指责 NASA 不公平的在最后一分钟改变方案，而只选择 SpaceX 将会危及到 2024 年载人登月的时间表。在政府问责办公室投解决所有未决诉讼前，NASA 通知 SpaceX 暂缓合同履行。
Forwarded from RSS bot
南极冰层溶解导致海面的上升，比预想的严重
http://jandan.net/p/108895
http://jandan.net/p/108895
煎蛋网
南极冰层溶解导致海面的上升，比预想的严重
海平面会升得比预计更高。
Forwarded from Hacker News
Implicit In-order Forests: Zooming a billion trace events at 60fps (Score: 100+ in 7 hours)
Link: https://readhacker.news/s/4KKJQ
Comments: https://readhacker.news/c/4KKJQ
Link: https://readhacker.news/s/4KKJQ
Comments: https://readhacker.news/c/4KKJQ
thume.ca
Implicit In-order Forests: Zooming a billion trace events at 60fps - Tristan Hume
Forwarded from Hacker News
Making Generative Art with Rust (Score: 100+ in 13 hours)
Link: https://readhacker.news/s/4KKQE
Comments: https://readhacker.news/c/4KKQE
Link: https://readhacker.news/s/4KKQE
Comments: https://readhacker.news/c/4KKQE
blog.abor.dev
Making Generative Art with Rust
Artists as technical experts and an interview with generative artist Alexis André
标题: Die Internationale
艺术家: Hannes Wader
专辑: Der Rebell
专辑封面: Cover
http://music.163.com/song?id=18267037
艺术家: Hannes Wader
专辑: Der Rebell
专辑封面: Cover
http://music.163.com/song?id=18267037
Forwarded from Hacker News
Scaling Monorepo Maintenance at GitHub (Score: 108+ in 1 day)
Link: https://readhacker.news/s/4KGZb
Comments: https://readhacker.news/c/4KGZb
Link: https://readhacker.news/s/4KGZb
Comments: https://readhacker.news/c/4KGZb
The GitHub Blog
Scaling monorepo maintenance
Today, GitHub can repack even the largest repositories we host in a fraction of the time it used to take. Here's how we did it, and why.
Forwarded from Hacker News
Why software engineers don't write documentation – it's bloody hard (Score: 104+ in 4 hours)
Link: https://readhacker.news/s/4KMXK
Comments: https://readhacker.news/c/4KMXK
Link: https://readhacker.news/s/4KMXK
Comments: https://readhacker.news/c/4KMXK
Kislay Verma
Why programmers don’t write documentation | Kislay Verma
We don't write documentation because writing clearly is extremely hard.
Forwarded from Starlight Serenade
知乎专栏
从圆角到圆角
从圆角到圆角iPhone 一直都是关于屏幕，Steve Jobs 在 2007 年发布会上就将第一代 iPhone 的 3.5 吋显示屏称为“巨大的屏幕”，而在 iPhone 设计最初阶段也同“无边泳池”这个意象相关联，所有的设计元素遵从于屏…
Forwarded from Hacker News
Thoughts on a “HDD shortage” from an industry insider (Score: 104+ in 4 hours)
Link: https://readhacker.news/s/4KNkZ
Comments: https://readhacker.news/c/4KNkZ
Link: https://readhacker.news/s/4KNkZ
Comments: https://readhacker.news/c/4KNkZ
reddit
Thoughts on a "HDD shortage" from an industry insider.
Welcome to /r/Chia! This subreddit is dedicated to open discussion of Chia cryptocurrency and any news related to the project. We believe that...
Forwarded from Hacker News
A whale who tried to mimic human speech (2014) (Score: 101+ in 3 hours)
Link: https://readhacker.news/s/4KNuZ
Comments: https://readhacker.news/c/4KNuZ
Link: https://readhacker.news/s/4KNuZ
Comments: https://readhacker.news/c/4KNuZ
Smithsonian Magazine
The Story of One Whale Who Tried to Bridge the Linguistic Divide Between Animals and Humans
While captive in a Navy program, a beluga whale named Noc began to mimic human speech. What was behind his attempt to talk to us?