People like to send mail that’s postmarked “Christmas,” or some other exotically-named town. Now you can send someone a letter from the International Space Station?if you can afford the $20,000 “stamp.” Now that the Russians are no longer taking tourists to the ISS, they’re thinking up new ways to make money to support their space program. For former communists, they certainly believe in capitalism when it comes to outer space.
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Astronomers once wanted to know what the surface of the moon and Mars looked like. Now we’ve been to the moon and sent robots to Mars, so they have new and more complex problems to ponder, such as:

Are we Martians? Scientists now agree that life could survive the trip on an asteroid to Earth from Mars, and what look like microbes have been found on a meteorite. A rock from Mars hits the Earth about once a month, on average, so there was plenty of opportunity for life to have been seeded here. If we find life on Mars, and compare it to the most basic life forms here, it will help to answer the question. More questions below…
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Brian Walker is known as the “Rocket Guy” because he’s built his own rocket, which he plans to ride into space. “Hopefully I’ll launch from the black rock desert in Nevada,” he says. He?s been working on Project RUSH (Rapid Up Super High) for 4 years. When his rocket, Earthstar One, is completed, he will use it to ascend 50 miles straight up. It will be fueled by 90% pure hydrogen peroxide, and will descend back to Earth by parachute.
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Huge buildings could be built in space using radio waves to move the pieces into place. Radio-controlled construction would make it unnecessary to move heavy construction equipment into orbit. It would also eliminate the need for space-walking construction workers. Engineer Narayanan Komerath got the idea from “acoustic shaping,” in which sound waves are used to build solid objects in weightless environments.
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