(Dec 23, 2005) NASA’s Hubble Space Telescope has helped discover new rings and two small moons orbiting Uranus. The largest ring is twice the size of the planet’s previously known rings, and went undiscovered until now because they’re so far away from the planet. Scientists think that particles in these rings are slowly spiraling away from Uranus, so there must be some source constantly replenishing them with new material.

Universe Today - New Rings and Moons Around Uranus

/. telstar writes “Though the debate continues around global warming, a new proposal suggests building an artificial space ring around the Earth to block the light of the sun and bring a balance to solar radiation, cloud cover, and heat-trapping greenhouse gases. The ring could be comprised of particles which would scatter the sunlight, or be built by an interconnected ring of spaceships aligned to block the light. The former proposal is estimated to cost anywhere from $6 trillion to $200 trillion dollars, while the spaceship solution would run approximately $500 billion. Halo fans rejoice.”

* Slashdot | Space Ring Could Combat Global Warming