Space probes would be safer.
Space probes are safer.
yes
Unmanned - Space probes are a form of robotic spacecraft.
Perhaps the question refers to manned space flights to the moon or other planets. However, NASA has been active in the International Space Station, as one example. NASA is also actively now trying to improve its Mars probes & probes to other areas of our solar system.
NASA occasionally sends out space probes instead of humans because astronauts could not survive on some of the places that space probes are sent to.
X33 concept space
No, no manned space flights have travelled beyond the Moon.
Manned space travel to Titan is not yet feasible, but probes have been there already.
NASA has sent several unmanned space probes to Saturn, but no manned missions.
Oxygen is only necessary on manned flights for breathing. Unmanned flights do not carry oxygen except to replinish the International Space Station.
Many different vehicles have been sent into space. Manned capsules, as well as shuttles and even satellites and probes have left the world into space.
Yes, Dr. Richard M. Linnehan was a mission specialist on several manned space flights.
Space probes are sent out on missions to gather scientific data. They are unmanned, which means that they can go farther than a manned shuttle could.