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POPS'Interplanetary internet' passes first test The new protocol is somewhat different from the one that forms the backbone of the internet, called TCP/IP. On Earth, if some data is lost between a sender and a recipient, the two communicate back and forth until all the information is sent. That 'handshake' works well on Earth, where the network is almost always continuously connected, says Adrian Hooke, team leader at NASA Headquarters in Washington, DC. But in space, probes pass behind planets and out of range, power outages are common, and distances between planets vary as the planets move in their orbits. In addition, at distances not far beyond the Moon, the time required to beam data between a sender and a recipient makes back-and-forth communication between the two inefficient, says Hooke.
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POPSControllers Cheer as Data Arrive From NASA's Spirit Rover Now we are analyzing the data we've received to determine what the next commands should be, but this is all good news." Spirit has been operating on Mars for nearly five years in an exploration mission originally planned to last three months. The recent dust storm is clearing, but a coating of dust on Spirit's solar panels is reducing the rover's ability to generate electricity even when the sky is clear. JPL, a division of the California Institute of Technology, Pasadena, manages the Mars Exploration Rover project for the NASA Science Mission Directorate, Washington.
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POPSJPL or Jens Pind Linkage This bracelet is made completely out of solid sterling silver and is really an eye catcher. Earrings or a necklace are available upon request.
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POPSVideo: Dr. Sally Ride on Our Changing Climate Studying Earth from space helps scientists understand our planet and the impact we have on it. America's first woman astronaut discusses how JPL instruments and missions have helped revolutionize what we know about Earth.
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POPSHungry, hungry black holes The conclusion comes from a large observing campaign of the spiral galaxy M81, which is about 12 million light-years from Earth. In the center of M81 is a black hole that is about 70 million times more massive than the Sun, and generates energy and radiation as it pulls gas in the central region of the galaxy inwards at high speed.
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POPS Many, Perhaps Most, Nearby Sun-Like Stars May Form Rocky Planets One intriguing thing about meeting people from another planet would be to find the role of religion in their culture (if they bother with religion). If they don't, many would see the need to convert them, if they did, would it be the same as ours, or would some see the need to convert them. Sorry, just an aside.
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