It is very very very well known that the Moon has a lot of Helium-3. This is a scientific result but not really a HUGE scientific discovery. I think the title is a little bit misleading...
Mr. 梅西爾, Everyone (including myself) is so interested whether you one day can be an astronomer / astrophysicist / astronaut or scientist of some sort. Being someone already started the journey to one of these, I would sincerely recommend you to read more English books, use more English than Chinese....
... technically you can't say about Kinetic energy in terms of GR as well...becoz' the clock and ruler are changing.... If this is true, why I can find formula of KE for SR? :roll: :roll: :roll: SR =/= GR ar ma =.=""" indeed, SR is just a special case in GR... That's exactly what I'm thinking. Why ...
[舉黃牌] The gravitational waves carries only a very very very very tiny part of the energy. So-called non-propulsion space-ship is just like throwing a ball up to the sky. A ball with not enough speed will fall down. The initial upward speed is the SAME as the speed when it hits the ground. That is, t...
Yes, that will be great for us!!! As mr. yuen pointed out, there are ~8% sale tax for me to buy at OPT. It will be only justified by the products are so unique that people would like to pay the premium and get it fast (v.s. 團購). But stuff on ebay/amazon or companies in the states (other than califo...
I also have a relative in San Diego who helped me a couple of times for shipping OPT products to me in Hong Kong. Those are Meade and Celestron products that OPT can not ship me directly, then I need to take this alternative route. That said, if you live in Califioria, you need to add a 7% local ta...
Probably they have chosen Priority Mail or Express Mail (see usps.com) which include some kind of insurance up to a few hundred USD. The cheapest First Class Mail (平郵) may take longer and do not have tracking number (harder to find in case of missing package). So there are pros and cons between diff...