When does a solar eclipse appear?

Answer 1

It depends on what day it is and what time of the year it is.






That depends on where the Moon is.
The Moon orbits the Earth but the apparent rising and setting of the Moon is caused by the Earth's rotation not the motion of the Moon (just like the apparent motion of the Sun). Therefore the time between two consecutive moonrises is about 24 hours. This 'about' is quite important. Because it is not exactly the same as the time between consecutive sunrises (read: because the Moon is moving) the relative positions of the Sun and Moon change so the time between sunrise and the next moonrise changes. (ps the relative positions of the Sun and Moon can be seen in the moons phase- hence I've used that below)
During the full Moon moonrise is about 12 hours after sunrise.
During the first quarter moonrise is 6 hour after.
Last Quarter: 18 hours after (6 hour before)
During the new moon they happen at about the same time.

Answer 2

Solar eclipses occur, about twice a year, when the Moon gets PRECISELY between the Sun and the Earth. The shadow of the Moon hitting the Earth is the solar eclipse.

The NASA Eclipse Web Page, at the link below, has a list of all eclipses from 2000 BCE to 3000 AD.

Answer 3

A lunar eclipse can occur only at the time of Full Moon.