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So, with XAP, is it capable of putting payloads into orbit? No, XAP will only be in the atmosphere (but the top level) and at zero airspeed. The Rockoon programe used a balloon as the first stage to get a rocket above a lot of the atmosphere for launch. It was very efficient for that...

Drop sonde Lunar: The idea of radar observation is great. The drop sonde could just as well be made of aluminum foil. Then it should be a 90 degree corner so that it reflects perfectly. Will a corner section fall as stably as the wedge shpwn?

Peanuts and paper aeroplanes Jay Fiondella owns a restaurant in Santa Monica, California on the U.S, west coast. It has a floor littered with peanut shells as he serves copius peanuts in the shell. One of his patrons carried a peanut to the Moon and back, which Jay keeps on display. If you...

Mesosphere ascension I note that Piccard competes regularly in the Mexican road races such as La Carrera Pan Americana. Pretty wild for an octogenarian. Ballooning can't be much more demanding...