NASACast: Solar System Audio

Earth is the end game for some objects from the asteroid belt.

Saturn and its moons will host NASA's Cassini mission for an extra two years.

Listen to sounds of possible rings around Saturn's moon Rhea.

NASA astronomers are tracking asteroid 2007 WD5, which they calculate has a 1 in 75 chance of hitting Mars in late January

Fifty years ago, launch of the Russian Sputnik satellite triggered the space race with America, which launched its own satellite, Explorer 1, shortly afterwards.

A new NASA mission will study water history and habitability at the north pole of Mars.