With the occasional nod to his greatest achievements, his exploration of the cosmos is at times a challenging, daunting ...

The famed astrophysicist Carl Sagan and former President ... solar panels on the White House. It was at Sagan’s suggestion that Voyager 1 turned around for one last look at its home planet ...

Voyager's Golden Record is a 12-inch gold-plated ... working with fellow astronomer Carl Sagan and artist and writer Linda Salzman Sagan. The starburst-like diagram is called a pulsar map, because ...