Hazards of space

1. Hazards of Space

2. Hazards of Space
As with anything in life, there are risks...
Apollo 1 - 1967 - 3 Astronauts died during a training ​exercise when a fire
broke out.
Challenger - 1986 - 7 Astronauts died when the ​shuttle exploded shortly
after take-off.
Columbia - 2003 - 7 Astronauts died when the ​shuttle exploded upon re-
entering Earth's ​atmosphere.

3. Hazards of Space
Let's think about it...
First, imagine being strapped into a small enclosed area above ​several hundred tones of highly
explosive fuel.
You then have to hope there is nothing to interfere with the take off.
When you make it to space you need to watch out for things like; ​floating debris, meteoroids, and
radiation.
When you're ready to come home, the re-entry is just as dangerous ​as floating around in space.
The angle you come in at cannot be too ​shallow (or you will bounce off the atmosphere) or too
steep (or you ​will enter too quickly and burn up).
Yikes...that's a lot to worry about!

4. Hazards of Space
What happens to our bodies in space?

5. Hazards of Space
What happens to our bodies in space?

6. Microgravity
Microgravity: Is NOT the absence of gravity - it
is what happens when an object is in "free fall"
This is what astronauts experience when they
orbit the Earth in the International Space
Station
Muscle mass and bone density decreases when
the body does not have to work against gravity
all the time.
Astronauts exercise a great deal each day to
keep up their fitness

7. Air & Breathing
Astronauts need oxygen but also must have carbon
dioxide removed.
Pressure must be maintained or air will not move
into the lungs - we breathe on Earth because of a
difference in pressure inside our lungs and outside
the body.

8. Life Support Systems
In order to meet create a suitable living
environment, engineers must design
complex systems (called life support
systems) to provide the proper
environmental conditions (oxygen, CO2,
temperature, humidity, pressure) and
provide water.

9. Space Junk
Space Junk: floating debris (pieces of space craft, tiny flecks of paint, parts
of rockets, satellites that are no longer working, etc.)

10. Space Junk
There are millions of pieces of space junk flying in earth’s orbit. Most orbital
debris comprises human-generated objects, such as pieces of space craft,
tiny flecks of paint from a spacecraft, parts of rockets, satellites that are no
longer working, or explosions of objects in orbit flying around in space at
high speeds.
Most “space junk” is moving very fast and can reach speeds of 18,000 miles
per hour, almost seven times faster than a bullet. Due to the rate of speed
and volume of debris in LEO, current and future space-based services,
explorations, and operations pose a safety risk to people and property in
space and on Earth.

11. Space Junk
In January, 1978, a ​nuclear-powered Soviet ​satellite crashed into the ​Great Slave
Lake area of the ​Northwest Territories. On re- ​entry to Earth’s atmosphere, ​the
satellite disintegrated, ​showering radioactive debris. ​No lives were lost, but
clean- ​up costs were nearly $15 ​million CDN and took almost ​8 months!

12. Space Junk