A space probe is an unmanned spacecraft that leaves Earth orbit and explores space. It may approach the Moon; enter interplanetary space; fly by, orbit or land .\r<br>\r<br>Unmanned probes are hurling through the cosmos in record numbers. Traveling billion of miles from Earth, they are carrying out longer more complex missions .\r<br>\r<br>\r<br>\r<br>Space Documentary - National Geographic: Deep Space Probes Unmanned probes are hurling through the cosmos in record numbers. Traveling billion of miles .\r<br>\r<br>Space Documentary National Geographic Deep Space Probes This documentary and the rest of the documentaries presented relate to important times and .
