Space travel in the 21st Century

Our best known and really only truly operating space agency currently in the world is the National Aeronautics and Space Administration or NASA. NASA is funded by the United States government through taxpayer money. The organization is well respected for its many achievements including its crown jewel, the Apollo program landing astronauts on the moon.

NASA's main orbital launch vehicle for satellites and humans at the moment is the Space Shuttle. The space shuttle was designed and developed during the 1970's with what is now 30+ year old technology. During the Space Shuttle's inception, the concept of a reusable craft capable of reaching orbit was revolutionary. Original plans called for a reusable unmanned orbiter utilized as a satellite launch vehicle. After several rounds of politics, an area was added that would support humans. This increased the overall project costs twofold through:
1) Building a larger spacecraft
2) Increased amount of fuel and supplies during launches.
Currently, it costs $450 million per launch. The Space Shuttle's large price tag annuls the original purpose of a cheap, reusable space craft intended for launching satellites.

The other serious issue the space shuttle faces is the overall reliability and safety. Within the 28 year Space Shuttle mission span, the Challenger and Columbia both failed with disastrous results taking all honorable lives on board. To put this in prospective, here are approximate probabilities of dying over a span of 1 year using various transportation methods from Reason Magazine:
Airlines crash = 1 in 400,000 or 0.00045 %
Walking across street = 1 in 48,500 or 0.0021 %
Automobile crash = 1 in 6,500 or 0.015 %
Space Shuttle crash = 1 in 1800 or 0.06 %.
Yes, to date an astronaut has an extremely high chance of dying if routinely flying shuttle missions.

The numbers speak for themselves, the space shuttle is both expensive and dangerous. Space flight is a relatively new phenomenon being around for little over 50 years. Loading multi-million dollar satellites and really brave souls onto oversize candles was at one time patriotic in the Cold War, but the Berlin Wall fell and it is time to move on. This is why the Obama Administration is reconsidering the program's future.

It looks like the future may not be NASA's (NASA is involved through), but through the Defense Advanced Research Projects Agency (DARPA) and US Air Force as the X-37B. The exact details are being kept secret due to the military aspect, but some details have slipped out.

The vehicle itself is about 29 feet long with a roughly 15-foot wingspan and weighs in at over five tons at liftoff. Speeding down from space, the craft would likely make use of Runway 12/30 — 15,000 feet long by 200 feet wide — at Vandenberg Air Force Base in California. This vague description is more in line with the original idea behind the Space Shuttle. That was to build a cheap, reliable spacecraft. As with all X-class aircraft, they tend to be experimental in nature with technology development as the main intent.

Just last month, a U.S. Air Force fact sheet noted that the Air Force Rapid Capabilities Office (RCO), located in Washington, D.C. "is working on the X-37B Orbital Test Vehicle to demonstrate a reliable, reusable, unmanned space platform for the United States Air Force."

It looks like the military is stepping into the forefront here. Hopefully, the technology will make its way into civilian hands through NASA.

"NASA has a long history of involvement with the X-37 program. We continue to monitor and share information on technology developments," said Gary Wentz, chief engineer Science and Missions Systems Office at the NASA Marshall Space Flight Center. "We are looking forward to a successful first flight and to receiving data from some advanced technologies of interest to us, such as thermal protection systems, guidance, navigation and control, and materials for autonomous re-entry and landing."

I truly believe the ability to reliably launch satellites cheaply into orbit would prove to be extremely profitable. This may not be too far away. Other ventures such as economically practical research and human space flight for the masses could then follow.