During a partial
_ lunar eclipse, Earth is between the sun and the moon in a straight line. Earth blocks any direct sunlight from reaching the moon. The sun is behind Earth, so Earth’s shadow falls on the moon and the shadow covers

In a
lunar eclipse, Earth is also between the sun and the moon, but not in a straight line. When that happens,
moon’s surface is covered by Earth’s shadow.

i just calculated it all out, and not including weekends, and all the different days off. as of this school year (2018-2019) students are spending 2198 hours in school this year

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.