Rigidized polymers appear to be a feasible technology to create space telescopes larger than kilometer sizes. It should be possible to make 50 meter space telescope elements in 1000 kilometer baseline ...

Two geologists have provide different, though not necessarily incompatible, explanations for a boundary in Earth's mantle at a depth of one megameter (1,000 kilometers). One study suggests that the ...

Discover the unique Ithaca Chasma feature on Tethys, the ice moon of Saturn, and its comparison to Earth's Grand Canyon. I know I haven't been posting much astronomy the past few days -- Comic Con, ...

Sinking slabs of ocean crust and rising plumes of hot rock in Earth's mantle are observed to behave differently below one megameter (1,000 kilometers) depth. Two explanations for this behavior were ...

Earth's mantle, the large zone of slow-flowing rock that lies between the crust and the planet's core, powers every earthquake and volcanic eruption on the planet's surface. Evidence suggests that the ...