Altitude and Human Life

High (8,000 - 12,000 feet [2,438 - 3,658 meters]), Very High (12,000 - 18,000 feet [3,658 - 5,487 meters]), and Extremely High (18,000+ feet [5,500+ meters]).

Death Zone:
The death zone is the name used by mountain climbers for high altitude where there is not enough oxygen for humans to breathe. This is usually above 26,247 feet (8,000 metres).

8,000 feet = 1.5 miles
10,000 feet = 1.89 miles
15,000 feet = 2.84 miles
20,000 feet = 3.79 miles
25,000 feet = 4.74 miles

Average altitude of a plane:
Most commercial jetliners cruise somewhere between 30,000 and 45,000 feet above mean sea level.

Habitable Planets

Mars and the Future of Manned Space Flight

Mars One

Biosphere 2

Mars and Nasa

Statistics of Interest

Federal Outlays for General Science, Space, and Other Technology, 1970 to 2009, and Projections, 2010-2011 and World Space Launch Events  (U.S. Census Bureau; pdf)

Let's consider these questions

  1. What are the planets in order from the sun?
  2. What is a galaxy?
  3. How many galaxies are there?
  4. What is a universe?
  5. What is the cosmos?
  6. What is a black hole? Are black holes real?
  7. How far has a human ever gone in space?
  8. How far has an aircraft ever gone in space?
  9. What is the international space station?
  10. What is the voyager?

Click links below to find answers from NASA:

Other items of interest:

Videos of potential interest:

The Unbearable Beauty of the Night Sky (video 7 min) 

NOvA: Exploring Neutrino Mysteries (Video: 5:52 min)  

Other items of potential interest:

Can you hear sounds in space? (Cornell University) 

New Data to Put Cosmic Light Speed Limit to the Test (NPR 4 min audio) 


Dr. Anne M. Arendt