I love watching the sunset from the beach it is beautiful, The Sun will set exactly due west at the equator on the spring.
Sunsets are beautiful! I live in Florida, so we get to see some pretty nice sunsets out here. Which do you prefer, sunset or sunrise?
sunset of course although sunrise are very beutiful as well, Near to the horizon, atmospheric refraction causes the ray path of light from the Sun to be distorted.
Is that why the sun looks much bigger as it gets closer to the horizon? Any idea why the sun changes into crazy colors right before it sets?
yes that is why and yeah i think it is beacuse of the sun rays that reflect on the water and clouds that make it get those crazy colors.
Oh! That explains the crazy oranges and pinks that we see when the sun sets. I heard that you can see a flash of green right before it sets too, or is that just a myth?
i have heard about the green ray but never seen it. Night occurs when the Sun reaches 18 degrees below the horizon 
Is that when the sun completely disappears over the horizon? Or is that when the sky turns completely black?
i think it is when it disappears from the horizon, it is also refered to by astronomers as a astronomical twilight haha
Haha such a creative name :P There's nothing like astronomical twilight! Although I prefer seeing the sunset right before it ;)