Chap 21
Who worked with liquid propellants
Hermann Oberth
lowest point of orbit
perigee
what is space (NASA definition)
50 miles/orbit happens at 80 miles
main rock found on moon's plains
basalt
when was Sputnik 1 launched
October 4, 1957
2 ways to increase thrust
increase mass of the exhaust
accelerate the exhaust particles to a higher velocity
circular and escape velocity depend on what
mass of the object
False
name of first asteroid
ceres
discovered the van allen belts
Explorer 1
3 types of propulsion systems
chemical, gas-heating, electric
the study of the arc of a nonorbiting body
ballistics
Composed of charged particles ejected from the Sun that flow continuously through and into plain space
solar wind
moon temperature range
270 to -250
4 types of satelites
communication, navigation, observation, scientific
measure of how much thrust will be obtained by a propellant
impulse
what keeps ballistic trajectories from going into elliptical orbit around the earth's center of gravity?
presence of the earth surface
region of earth's atmosphere where ionized gas plays a big part in the dynamics of the atmosphere
Magnetosphere
what makes Mars red
high iron oxide content
first repeater satellite
Courier IB
devised a rocket that was propelled by gunpowder
konrad kyeser von eichstadt
what is burnout velocity
velocity that must be reached by a rocket before its engine ceases to produce thrust in order to place a spacecraft on its intended trajectory
composition of solar atmosphere
photosphere, chromosphere, corona
exploding star
super nova
What is Score and when was it launched
first commercial satellite. 1958