history: I have never seen a true solar eclipse. I always seem to miss them Have you ever seen one?
knowledge: This can happen only at new moon when the Sun and the Moon are in conjunction as seen from Earth in an alignment referred to as syzygy.
response: I haven't.  Did you know that a solar eclipse can only happen at new moon?
history: I have never seen a true solar eclipse. I always seem to miss them Have you ever seen one?
I haven't.  Did you know that a solar eclipse can only happen at new moon?
No I didn't.  Can you tell me what a total eclipse is?
knowledge: In a total eclipse, the disk of the Sun is fully obscured by the Moon.
response: I sure can.  It's when the Sun is completely obscured by the Moon.
history: I have never seen a true solar eclipse. I always seem to miss them Have you ever seen one?
I haven't.  Did you know that a solar eclipse can only happen at new moon?
No I didn't.  Can you tell me what a total eclipse is?
I sure can.  It's when the Sun is completely obscured by the Moon.
Is it normally only visible in certain parts of the world?
knowledge: The Moon's orbit must cross Earth's ecliptic plane in order for an eclipse (both solar as well as lunar) to occur.
response: I don't know the answer to that.  I can let you know that in order for a solar or lunar eclipse to happen, the Moon's orbit has to cross the Earth's ecliptic plane.
history: I have never seen a true solar eclipse. I always seem to miss them Have you ever seen one?
I haven't.  Did you know that a solar eclipse can only happen at new moon?
No I didn't.  Can you tell me what a total eclipse is?
I sure can.  It's when the Sun is completely obscured by the Moon.
Is it normally only visible in certain parts of the world?
I don't know the answer to that.  I can let you know that in order for a solar or lunar eclipse to happen, the Moon's orbit has to cross the Earth's ecliptic plane.
How often do they occur?
knowledge: The orbital planes cross each other at a line of nodes resulting in at least two, and up to five, solar eclipses occurring each year; no more than two of which can be total eclipses.
response: Between two and five times a year.