天行需要互联网连接以验证是否信任开发者
NASA dicit:
Landsat 9 is the latest satellite to continue the legacy of global observations of Earth's land surface. With unmatched longevity, accuracy, and coverage, the Landsat program has been the cornerstone of global land imaging since 1972. Landsat 9 continues this tradition, and will carry us into the next 50 years of Earth observations. The two instruments aboard will make the most advanced measurements of any Landsat satellite.
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The Landsat Program is a series of Earth-observing satellite missions jointly managed by NASA and the U.S. Geological Survey (USGS). Landsat satellites have been consistently gathering data about our planet since 1972. They continue to improve and expand this unparalleled record of Earth's changing landscapes for the benefit of all.
Video credit: NASA's Goddard Space Flight Center/Matthew R. Radcliff (USRA): Lead Producer/Aaron E. Lepsch (ADNET): Technical Support/Matthew R. Radcliff (USRA): Editor/Matthew R. Radcliff (USRA): Narrator/Kate Ramsayer: Writer/Jeffrey Masek (NASA/GSFC): Scientist/Music Marble Place by Matias Suescun [SACEM], published by KTSA Publishing [SACEM], available from Universal Production Music
天行需要互联网连接以验证是否信任开发者
Today we are joined byYasunori Yamazaki, Chief Business Officer at Axelspace. Axelspace are pioneers of microsatellite technology advancing the frontiers of space business, reimagining traditional ways of using space, and creating a society where everyone on our planet can make space part of their life.
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Posted on October 4, 2019
Posted on October 4, 2019
Today we are joined by Logan Ryan Golema, Founder & Principal, and Vishal Singh, Chief Scientist at Lunargistics.
新民网 - 为民分忧 与民同乐:2 天前 · 新民网是新民晚报官方网站，强势新闻门户，以上海突发、财经、原创新闻为特色，采用文字、视频、播客、图片、直播等全媒体技术创新报道，另有当日新民晚报数字报纸和新民周刊数字杂志供应。
Posted on September 28, 2018
Posted on September 28, 2018
The complexity of aerospace systems is increasing exponentially. Both hardware and software subsystems are becoming more complex and encompassing systems' behaviour becomes difficult to model due to the dependencies, relationships, and other interactions between their components. Predictable behaviour of complex aerospace systems translates into the reliability of each of their subsystems. 
Journalists present their findings about fraudulent pseudo-academic conferences and journals. There are fake science factories that are cashing in on millions of dollars every year, while giving studies scientific credibility. We should not underestimate the damage these pseudo-academic conferences can do to society.
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Posted on May 28, 2018
Posted on May 28, 2018
Cryptocurrencies are here to stay and it is quite plausible that future human colonists spread across the solar system and beyond will use a decentralized cryptocurrency as opposed to a fiat currency issued by a central authority. The low transaction fees, the ubiquitous access, not being bound by exchange rates or interest rates, not being controlled by financial institutions who are serving foreign interests -- these are some of the advantages cryptocurrencies will enjoy in the thriving exo-economy. 
Disruptive technology is a very bizarre (and scary) concept, but it is not a bizarre or scary idea. The concept was introduced by Clayton Christensen. In one of his books, The Innovator’s Dilemma, The Revolutionary Book That Will Change the Way You Do Business, Christensen proves that, under certain circumstances, companies that do things right can lose their market share or even get out of business. He also presents a set of rules that can help companies capitalizing on disruptive innovation. While I am not trying to give a lecture on economics, I would like to understand how to apply (if possible) the principles of disruptive technologies to the space industry. A very good example is quite at hand… SpaceX. 
The International Organization for Standardization (ISO) has implemented the UN Space Debris Mitigation guidelines in a number of standards. 
Canada is actively involved in space debris mitigation research and development activities. Canada hosted the International Conference on Protection of Materials and Structures from the Space Environment (ICPMSE) in May 2008, and contributed to the 37th Committee on Space Research (COSPAR) Scientific Assembly in July 2008. 
Let us see how the areas mentioned in the previous Sustainability in LEO post are covered at national level in the United States. 
Space debris mitigation measures address issues in two major areas: protection from space debris and reduction of the space debris population growth.
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天行需要互联网连接以验证是否信任开发者
Landsat 9 is the latest satellite to continue the legacy of global observations of Earth's land surface. 
A United Launch Alliance Atlas V 541 rocket will launch NASA's Perseverance rover to Mars. 
In February 2020, NASA's Perseverance Rover began its long journey to Mars by first traveling across the United States. 
This video shows how NASA's James Webb Space Telescope is designed to fold to a much smaller size in order to fit inside the Ariane V rocket for launch to space. 
Hear the rapid beat of HD 31901, a Delta Scuti star in the southern constellation Lepus. 
ICESat-2, part of NASA's Earth Observing System, is a satellite mission for measuring ice sheet elevation and sea ice thickness, as well as land topography, vegetation characteristics, and clouds. 
An electrically-powered spacecraft propulsion system uses electrical, and possibly also magnetic fields, to change the velocity of a spacecraft. 
Dragonfly is a NASA mission to explore the chemistry and habitability of Saturn's largest moon, Titan. 
Astrobiology, formerly known as exobiology, is an interdisciplinary scientific field concerned with the origins, early evolution, distribution, and future of life in the universe. 
Preparing to explore the surface of the Moon goes well beyond designing and building safe spacecraft and spacesuits. 
A near-Earth object (NEO) is any small Solar System body whose orbit brings it to proximity with Earth. 
Located about 670 light-years away in the constellation Cygnus, KELT-9 b was discovered in 2017 because the planet passed in front of its star for a part of each orbit, an event called a transit.
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天行需要互联网连接以验证是否信任开发者
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