1. The risks and accidents of space travel Tensae Demissie

2. Dangerous radiation particles are abundant beyond earth orbit

3.  Zero to reduced gravity causes bone and muscle loss

4.  Long term space travels can lead to psychosocial pressure  Boredom  Isolation

5.  As of 2007, in-flight accidents have claimed 19 astronauts  Training accidents have killed 11 astronauts  Launch pad accidents have killed 71 ground personnel

6.  Command module was destroyed by fire during a test and training exercise on Jan 27, 1967  Three crew members died  Gus Grisson, Edward White and Roger Chaffee

7.  Russian manned spaceflight  Soyoz spacecraft carrying Vladmir Konarov crashed during its return to earth  First in-flight fatality in the history of spaceflight

8.  X-15 was an experimental air craft  It broke apart minutes after launch due to technical difficulties killing Michael J. Adams

9. Successful visit to the international space station The crew capsule depressurized during re-entry The three crew members died

10.  NASA’s second space shuttle orbiter  It completed nine missions  During the tenth mission, it broke apart 73 seconds after launch resulting in the death of all seven crew members

11. The first space shuttle orbiter Flew 27 times It was destroyed during re-entry killing all the seven crew members

12.  Apollo 13  The third manned mission intended to land on the moon  Lunar landing was Aborted due to mid-mission technical difficulties  The crew members along with the command module were successfully recovered

13. 5% have died on space flight 4.1% are NASA astronauts 0.9% are Russian cosmonauts

14.  There will always be risks associated with manned space flight  The strength of the desire to explore space appears to heavily outweigh the cost of the risks