Any clock keeps time, but space-time is much harder to pin down.
SPACE.com invites experts in space exploration, science & technology to provide insightful commentary and informed perspective on news, current events, innovations, big ideas and ongoing research. Expert Voices includes Op-Ed analysis and opinion as well as interesting observations from the field and space exploration efforts around the world.
In a pinch, would you rather drive that ship with dilithium crystals or good old-fashioned ion propulsion?
Is it likely that we’re not alone in the universe? And if intelligent life is out there, why haven’t they contacted us yet?
If crewed spaceflight is to survive, Americans need to worry less about where to go and instead just get off the ground.
A massive new telescope under construction in Chile, the LSST, will be one of the largest eyes on the sky — and it's getting scientists excited about what they might find.
A gallery of Ed Belbruno's most recent art inspirations, the muse for mathematical theories yet to come.