Difference Between the 1st and 3rd
Similarities and Differences between the 1st and 3rd Quarter Moon Phase
The reason is because:
-The 1st quarter is in the "waxing" phase, which means "increasing in light"
-The 3rd Quarter is in the "waning" phase which means "decreasing in light"
Are Moon Phases different from people on Earth to people in Space?
In some opinions the answer is no because as you are on Earth you can see lets say a full moon. The People on the ISS can see a full moon as well because the ISS is between Earth and the ISS. The ISS is 400km away from Earth while the moon is 380,000km away. I don't think 400km is a big difference to that.
How to figure out Waxing/ Waning
Waning phases begin with the "full moon" which has 100% light visible. Waning means "gradually getting smaller". As the light would begin on the right in waxing phases, light fades from the right in the waning phases. Only until it goes back into a new moon over the next two weeks.