The doughnut is making a comeback – at least as a possible shape for our Universe.
The idea that the universe is finite and relatively small, rather than infinitely large, first became popular in 2003, when cosmologists noticed unexpected patterns in the cosmic microwave background (CMB) – the relic radiation left behind by the Big Bang.
t was once considered the most dangerous object in the universe, heading for Earth with the explosive power of 84 Hiroshimas. Now an asteroid called 2000SG344, a lump of rock barely the size of a large yacht, is in the spotlight again, this time as a contender for the next giant leap for mankind.
Nasa engineers have identified the 1.1m tonne asteroid, which in 2000 was given a significant chance of slamming into Earth, as a potential landing site for astronauts, ahead of the Bush administration's plans to venture deeper into the solar system with a crewed voyage to Mars.
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The UCS Satellite Database is a listing of operational satellites currently in orbit around Earth. The UCS Satellite Database is the only free, comprehensive compilation of active satellites in an easy to manipulate, commonly-used database format.
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Space is littered with millions of bits of orbiting garbage leftover from missions. The flying flotsam can delay launches and could potentially smash into spacecraft. Now some creative ideas are emerging for how to sweep up the junk. One idea even involves an oversized NERF ball. The graveyard of ghostly scraps from satellites and other craft continues to grow. Last year, the intentional destruction of China's Fengyun-1C weather satellite sent at least 150,000 bits of orbital debris less than a half-inch (one centimeter) across and larger into space, according to NASA's Orbital Debris Program. Read complete @ Space.com
