Galileo will comprise a civilian-controlled constellation of 30 satellites, but civil aviation authorities are skeptical that Europe’s space sector can meet navigation and communications safety standards.

Google Lunar XPrize grants contestants more time and money to meet a difficult goal.

An annual assessment of NASA’s human spaceflight programs points to safety risks resulting from a lack of transparency and a disconnect between program goals and funding.

NASA’s fiscal 2016 budget request continues to feature past policies, and is likely to experience past partisan battles on Capitol Hill as well.

Estonia spends several hundred million euros a year on space activities.

Since unveiling plans in January to build rival networks of hundreds, or even thousands, of Internet satellites in low Earth orbit (LEO), SpaceX and OneWeb are prompting comparisons with past ventures that flopped, among them Teledesic and Skybridge, two well-financed start-ups whose visions of delivering high-speed broadband to the masses were thwarted by technical setbacks.