Challenge 1 Getting into Space To escape the Earths gravity rockets must be used to reach high speeds 112kms or 40320 kmh Acceleration speeds must be carefully calculated based on weight so that there is not too much vibration or gravitational pull on the shuttle and astronaut ID: 783182
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Slide1
Section 10.2
The Challenges of Space Travel
Slide2Challenge #1:
Getting
into Space
To escape the Earth’s gravity rockets must be used to reach high speeds 11.2km/s or 40,320 km/h).
Acceleration speeds must be carefully calculated based on weight so that there is not too much vibration or gravitational pull on the shuttle and astronauts.
Then they must reach the perfect speed (At an altitude of 242 km above Earth, orbital velocity is about 27,400 km/h) to stay in orbit.
Slide3Fuel
Getting into space requires A LOT of fuel.
Traditional Fuel:There is a reaction between the fuel and oxygenLiquid hydrogen/liquid oxygen
Nitrogen tetroxide (N
2
O4) and hydrazine (N2H4)Almost all of the fuel is used during the launchOnce in orbit fuel is only used for short spurts to alter course
Slide4Challenge #2 – Living in Anti-gravity
Thing in space are in continuous free fall and so thing inside them have a feeling of weightlessness.
Microgravity Environment: an environment in which objects behave as though there is little gravity affecting them.Everything must be secured.
Slide5Health Effects
Things in our bodies require gravity to assist in their function.
Blood pools in the upper body – puffy faceMuscle atrophy – bird legsThey must exercise at least 2 hours a day to prevent muscle atrophyBone loss – lose up to 2% per monthRadiation from the Sun – space vehicles must have special protective shields.
Slide6Challenge #3 – Water and Food
Water:
Every drop of water is recycled (from water vapour to urine) through a water-purifying systemAstronauts use special soap and shampoo that do not require the use of water.Food:Currently astronauts enter their mission with all the food they’ll require for the duration of the trip.
Slide7Living on the ISS
Slide8Today’s Tasks
Read about Humans on Mars (Pg. 423-424)
Read about Space Junk (Pg. 424)Answer #1, 4, 9, 10