Moon Phases
HR Diagram
Distance Ladder
EM Spectrum
Orbits
100

The phase of the moon that sets at 12am, midnight

1st quarter

100

The diagonally line of stars fusing hydrogen ineo helium

Main Sequecnce

100

The percieved shift in a star's position with respect to the background stars

Parallax

100

The mosst energtic light on the electromagnetic spectrum

Gamma rays

100

The relationship observed by Kepler and mathmetically used by Newton to determine the mass of the planet/Sun based on the orbit of an orbiting body within our solar system

p^2=a^3

200

The left half of the visible side is lit

waning 3rd quarter

200

The leftover core of typical F and G class stars located in the lower left corner of the diagram

White Dwarves

300

The phase that occurs during the week following the new moon

waxing crescent

300

Hot blue massive stars located in the upper left corner of the diagram

O type stars

400

The phase where the right visible side is mosly lit 

Waxing Gibbous

400

The most common star type in the universe found at the bottom right corner of the diagram

M type stars

500

The moon phase that is high in the sky at 3am

waning gibbous

500

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Star Classification mnomeic

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