the Moon is unusually far from Earth.

the Moon’s phase is new.

everyone on the night side of the Earth during the eclipse will see it.

the Moon will be travelling in the shadow cast by the Earth.

everyone on the night side of the Earth during the next few days will see it.

the Moon is unusually close to Earth.

the Moon will pass in between the Sun and Earth, and will cast a shadow on the Earth.

only specific locations will be able to see it.

the Moon’s phase is full.