This ancient greek geocentric universe with crystalline spheres
Who is Aristotle
100
An object at rest, or in motion, will remain in that state unless acted on by an outside force
What is Newton's 1st Law
100
Size of the orbit
What is the Semimajor axis (a)
100
Orbit with a period of 90-120 mins and a max altitude of 1500 km
What is LEO
100
Vertical ascent, pitch-over, gravity turn, vacuum
What are the phases of launch
200
Believed in a heliocentric universe and circular orbits
Who is Nicolaus Copernicus
200
Force of gravity between two bodies is directly proportional to the product of their masses and inversely proportional to the square of the distance between them
What is Newton's Law of Universal Gravitation
200
Tilt of the orbit
What is the inclination (i)
200
Orbit has approx. 98 degree inclination and passes over the same spot on Earth at the same time of day
What is a sun-synchronous orbit
200
When the launch site and orbital plane intersect
What is a launch window
300
Turned down the Danish court to study astronomy. Studied Mars and proved that the universe was heliocentric. Observed supernova of 1572 and comet of 1577
Who is Tycho Brahe
300
Orbits are planetary ellipses with the Sun at one focus
What is Kepler's 1st Law
300
Shape of the orbit
What is eccentricity (e)
300
Orbit has a period of 12 hours and approx. altitude of 20184km, in Medium Earth Orbit (MEO)
What is a semi-synchronous orbit
300
The total number of launch opportunities when the launch site latitude < orbit inclination
What is 2 opportunities
400
Used math to further Brahe's (Bff) observations, resulting in 3 Laws of Planetary Motion
Who is Johannes Kepler
400
Orbital objects sweep equal areas in equal time
What is Kepler's 2nd Law
400
"Twist of the orbit", measured angle from Vernal Equinox to ascending node
What is Right Ascension of the Ascending Node (RAAN)
400
Orbit with a period of 24 hours and approx. altitude of 36000 km. Provides constant viewing, broad coverage, and large footprint. 3 satellites can cover the entire Earth, minus poles
What is a geosynchronous orbit
400
The orbital elements required to determine a launch window
What is RAAN, launch site latitude, orbit inclination
500
Utilized and improved the telescope, observing the moons of Jupiter and demonstrating that all objects fall at the same rate
Who is Galileo Galilei
500
State Kepler's 3rd Law
What is "the square of the period is proportional to the cube of the mean distance between the sun and the planet"
500
The measured angle from ascending node to perigee
What is Argument of Perigee (w)
500
Highly Elliptical Orbit (HEO) with a long dwell time over northern latitudes, also has a specific inclination of 63.4 degrees
What is Molniya
500
The US launch facility for retrograde/polar orbits