Around 29.5 Days
It is the average time of the revolution of the moon around the earth with respect to a line joining the sun and the earth. It is the period the moon takes to pass through all its phases.
3
No. That's the time for a complete cycle - to go once through all hte phases.No. That's the time for a complete cycle - to go once through all hte phases.No. That's the time for a complete cycle - to go once through all hte phases.No. That's the time for a complete cycle - to go once through all hte phases.
Firstly it is because the moon appears brightest when it is furthest from the Sun and is darkest when it is closer to the Sun than the Earth. Secondly because the Earth has a circular shadow. Thirdly because of the Moon's angle to the ecliptic it does not pass through the Earth's shadow very often. When it does the event is called a lunar eclipse (Not to be confused with the rarer and more spectacular solar eclipses)
No.
8 phases
It is the average time of the revolution of the moon around the earth with respect to a line joining the sun and the earth. It is the period the moon takes to pass through all its phases.
The Earth would be all the time in the same direction - more or less. It would have about 4 times the apparent diameter the Moon seems to us - about 2 degrees instead of 1/2 degree. You would see the Earth pass through all the phases, similar to the Moon's phases.The Earth would be all the time in the same direction - more or less. It would have about 4 times the apparent diameter the Moon seems to us - about 2 degrees instead of 1/2 degree. You would see the Earth pass through all the phases, similar to the Moon's phases.The Earth would be all the time in the same direction - more or less. It would have about 4 times the apparent diameter the Moon seems to us - about 2 degrees instead of 1/2 degree. You would see the Earth pass through all the phases, similar to the Moon's phases.The Earth would be all the time in the same direction - more or less. It would have about 4 times the apparent diameter the Moon seems to us - about 2 degrees instead of 1/2 degree. You would see the Earth pass through all the phases, similar to the Moon's phases.
3
Three
No. That's the time for a complete cycle - to go once through all hte phases.No. That's the time for a complete cycle - to go once through all hte phases.No. That's the time for a complete cycle - to go once through all hte phases.No. That's the time for a complete cycle - to go once through all hte phases.
The moon needs to pass through the Earth's shadow for there to be a lunar eclipse.
Because often the moon doesn't pass directly in front of the sun. It often goes above or below the sun instead while traveling along its orbit the 15+ times it phases through new moon (the phase where solar eclipses happen) a year.
The earth's shadow falls on the moon only during a lunar eclipse. Eclipses of the moon can have varying degrees of totality. The earth's penumbra (partial shadow) may pass over the moon, or the umbra (full shadow) may pass over some or all of the moon's surface. All of these happen only at the time of full moon. The moon's regular phases are NOT caused by earth's shadow on the moon, as is incorrectly believed by some.
Contrary to popular belief, the phases of the moon throughout a typical month have nothing at all to do with earth's shadow. The earth's shadow passes over the moon only at the time of full moon, and only rarely does it do that. The various phases of the moon that we observe come about because we are actually seeing the long lunar day (it is equal in length to the moon's phase cycle-- one synodic month) pass over the face of the moon that we can see from earth. It's odd to think of the moon going through a day, but as the moon orbits around earth it stands to reason that we will see the moon changing its relationship with the sun. Sometimes we will see the sun shining more on the face we can see, and sometimes we will see the sun shining on the moon at different angles.
Yes, and through the smaller "umbra" as well.
Firstly it is because the moon appears brightest when it is furthest from the Sun and is darkest when it is closer to the Sun than the Earth. Secondly because the Earth has a circular shadow. Thirdly because of the Moon's angle to the ecliptic it does not pass through the Earth's shadow very often. When it does the event is called a lunar eclipse (Not to be confused with the rarer and more spectacular solar eclipses)