Oh Great Heavens
This governing body supported the geocentric model of the solar system and disallowed talks of a heliocentric model.
Roman Catholic Church
smallest particles of the early solar system, often thought of as the building blocks of planets.
Protoplanetary Dust Particles
The gravitational bullies of the solar system
Jupiter and Saturn
Kepler's 3rd Law
Law of Harmonies
Smaller Orbit = Quicker Year
Larger Orbit = Slower Year
The milky way is this type of Galaxy. (Be specific)
Barred Spiral
This philosopher/astronomer provided two pieces of evidence for the heliocentric model. Phases of Venus and the moons of Jupiter.
Galileo
These asteroid sized objects form through collisions, where their material breaks apart and reforms to make a larger object.
Planetesimals
The terrestrial planets
Mercury, Venus, Earth, Mars
Law of Universal Gravitation
Fg = G x m1m2/r2
This is the name given to galaxies that collide with each other. Often resulting in irregular galaxies.
Merger Galaxies
This mathematician/astronomer provided the math for proving the heliocentric model, leading to his laws of Planetary Motion.
Kepler
The slow gathering of material as planets orbit around a star.
Accretion
The Gas Giants (Not to be confused with the Ice Giants)
Jupiter and Saturn
Gravitational Lensing
The bending of light due to a large gravitational presence.
These galaxies are the most abundant type (not including dwarf galaxies). They are also the oldest and are no longer forming new stars.
Elliptical Galaxies
This philosopher developed the geocentric model of the solar system, which was used for over a thousand years.
Ptolemy
The ability for a planet to pull items in with it's gravitational pull and sling shot them back in the direction they came. Feels bad for the early terrestrial planets.
Gravitational Focusing
The Ice Giants
Uranus and Neptune
Kepler's 2nd Law
Equal times of travel means equal areas covered along a planet orbit. If T1 = T2 then A1 = A2
Proves planets move faster in their orbit when closest to the sun.
This scientist discovered that galaxies exist outside our own Galaxy.
Edwin Hubble
This philosopher reintroduced the heliocentric model and provided the evidence of the retrograde of Mars when observed in the night sky.
Copernicus
An event that occurred involving Jupiter and Saturn early in the solar system that stunted the growth of the inner planets.
Planetary Resonance
"Infant" Solar System
Protoplanetary disc
Kepler's 1st Law
Law of Ellipses
The sum of distances between the focal points and a planet along its obit will always add up to the same.
d1 +d2 = Same Sum
This invisible force allows for objects further out in galaxies to retain their velocity.
Dark Matter