Our coverage sheds light on the boundless darkness, the physical violence and the mysterious, awesome reaches of our universe. We ponder how it all began and about our place in the cosmos: Are we alone? Is there life on other planets? Will interplanetary travel save the human race? We also explore space through images, videos and illustration.
Numerous bits of orbiting debris threaten spacecraft, so two teams propose tracking them with unique license plate-like transponders.
Just as sailors can look to constellations for their bearings, interplanetary travelers could use pulsars to navigate the universe.