Prachi Patel

The new concept, called beamed thermal propulsion, involves propelling a rocket by shining laser light or microwaves at it from the ground.

Scientists are working on a robotic airplane to explore Mars.

Sun-powered spacecraft could be the ticket to traveling beyond the solar system, scientists say.

The shrinking technology of cell phones, laptops and cameras are now leading to palm-sized satellites.

New robot blimps or balloons could for thousands of kilometers to explore other planets and moons from a bird's eye view.