Five spots where the Earth’s and Sun’s
gravitational and centrifugal forces balance
What is Lagrange points
100
First man to orbit the Earth; rode aboard
Vostok 1 on April 12, 1961
What is Yuri Gagarin
100
The first artificial satellite to orbit Earth;
launched by the Soviet Union
What is Sputnik 1
100
Equation for Force
What is F = m * a
Force = mass times acceleration
100
American Neil Armstrong is the first man to
walk on the Moon
What is 1969
200
The strength of a rocket engine
What is Thrust
200
First man to walk on the Moon; rode aboard
Gemini 8, Gemini 12, and Apollo 11
What is Neil Armstrong
200
First U.S. satellite; discovered the Van Allen
radiation belt
What is Explorer 1
200
Variable for Thrust
What is T
200
American Neil Armstrong is the first man to
walk on the Moon
What is 1957
300
Farthest point from the center of an orbit
What is Apogee
300
Second man to walk on the Moon; rode
aboard Apollo 11 and Gemini 12; proved that
a trained astronaut could easily and
efficiently work outside the spacecraft
What is Buzz Aldrin
300
Brought first man into space on April 12, 1961
What is Vostok 1
300
Variable for change in velocity
What is ΔV
Delta-V
300
NASA’s Space Shuttle Program ends
What is 2011
400
Closest point to center of an orbit
What is Perigee
400
First American astronaut in space; rode
aboard Freedom 7 and Apollo 14
What is Alan Shepard
400
Brought the first American astronaut into
space; 15 minute suborbital flight
What is Freedom 7
400
Variable for Earth’s gravitational constant; 9.8
meters/sec2
What is G
400
China intends a station around the moon
What is 2020
500
The generation of efficient energy from a
rocket already moving at high speed
What is Oberth effect
500
First woman and first civilian in space; rode
aboard Vostok 6
What is Valentina Tereshkova
500
Unmanned rover that discovered potential
signs of life in Martian soil