Also, such an unmanned mission would eliminate the need for shock absorbers, the most problematic issue of the design.

This unmanned mission is scheduled to fly by Pluto in July 2015.

This would be the second flight of the shuttle, which orbited the earth on an unmanned mission last year.

Scientists see major opportunities for further research by unmanned missions.

The unmanned mission has been put off indefinitely, Tass said.

Since 1962, Cornell has been involved in unmanned missions to Mars.

An unmanned orbital mission could have done that nicely.

The unmanned missions have until now explored most of our solar system.

More than 1,000 unmanned missions have been designed to explore the Earth and the solar system.

Professors, students, and researchers have been very involved with many unmanned missions to Mars.