Space exploration is one of the most high-end risks we as humans, could take part in. However, when we see the images of what lies beyond our view, it is somehow worth every last breath. Nevertheless, it is still an extremely dangerous, not to mention expensive, operation, that if manned could play the difference between life and death. Whether it is manned or not, space explorations can cost a massive amount of money. This money usually comes from the government, otherwise known as taxes, and if used on a failed mission can put a lot of pressure on the government for their spending strategies.  Next when going into space there is an overwhelming dependency on the equipment used to: one, get the space probe into space, and two, to keep the apparatus on the spacecraft working and functioning properly while in space. Third, no one can predict what will happen to you in space. Not in the sense that there are extraterrestrial beings, but the fact that scientists may not be prepared for any impromptu dilemmas that occur in space, negatively effecting the operation. Lastly, if investigating the surface of a planet, the foreign atmospheres, consisting of elements such as hydrogen, nitrogen, ammonium, methane, etc. can degrade or cause harm to the spacecraft. Thus decreasing the amount of time the space probe has to gather evidence. If not, the spacecraft is left to deal with whatever conditions are in effect, while it in orbit, with the help of space officials by computer. All in all, the risk of going into space is enormous, since chance and reliability play a big role.

http://www.usatoday.com/news/nation/2003-02-01-accident-timeline_x.htm

http://potpiedeluxe.com/files/2010/05/Kari_Nebula_WS_by_casperium.jpg