外围体育投注I have strong interests in robotic space exploration and comparative analogue science - the study of places on Earth that are similar to environments on other planets and moons. Over the past fifteen years, I've logged 3,000+ field work hours all over the world, including work in the Arctic, Antarctic, and desert environments, where I've tested and performed scientific investigations with multiple prototypes of planetary exploration instruments on board European Space Agency, Canadian Space Agency, and NASA missions. Some of the technologies developed by my team include one of the world's most advanced ocean exploration platforms in NASA's toolbox, an underwater robot to explore extraterrestrial oceans, and the most sensitive laser Raman spectroscopy sensor currently under development for NASA, a first in class instrument that can detect traces of extinct and extant life in planetary surfaces.
I will be on at 11am PDT (2 PM ET, 18 UT), AMA!
At the time where people started to go to space they made these small spacewalks from the crew capsules but how did they do that? I think they needed some kind of airlock so they don't lose their air but how does an airlock fit inside these small capsules? Or did they just had a tank of air to fill the vacuum after the spacewalk?
外围体育投注I'm sorry if my sentences sound wierd. English is not my first language but I hope you understand what I mean. Understanding it is easier than writing. I also didn't know what flair to use for my question because there was none for spaceflight or something similar so I just used the Physics one
Based on observation, it seems to me that the square root of any positive integer is always either another positive integer or is irrational. Is this true? Has it been proven? Is there a simple explanation for understanding why it is true (or not).