In order for a viable, sustainable economy based on human spaceflight to emerge in low Earth orbit (LEO), a number of elements must be present. First, the marketplace dynamics of supply and demand ...

A rare kind of meteorite known as enstatite chondrite resembles Earth's composition roughly 4.5 billion years ago. The key to their counterargument resides in a rare type of space rock called ...

The formation of the Earth may have looked more like a fast, inevitable landslide than like a slow series of occasional cataclysms, as scientists have long theorized, according to findings published ...

(CNN) — Researchers say they have uncovered evidence that early Earth was home to more hydrogen than previously thought, calling into question widely held beliefs about the origins of water and the ...

Scientists widely agree that an ancient planet likely smashed into Earth as it was forming billions of years ago, spewing debris that coalesced into the moon that decorates our night sky today. The ...

The United States led global production of rare earth elements (REEs) until the mid-1990s, when China emerged as the dominant supplier. China maintained near-total control of the market until 2012.

This collection of papers identify a number of important policy questions that will be of rising importance as NASA transitions LEO to the private sector, as well as a number of economic analysis ...