why does it get darker in some moths that in other months?

Question

like it gets darker quicker in fall andlighter quicker in fall.

Answer 1

You did meant to say "months" twice, right? Because moths and months are slightly different things.

Anyway, the difference is caused by how close the earth is to the sun (during its orbit around the sun.) When the earth spins each day, it turns from day to night because the earth is facing the sun for half of the turn (roughly) and facing away for the other half (causing day and night.) But depending on the orbit, the sun hits the earth differently.

The sun in fall and winter is more direct, I mean, like it hits you in the face. It's, um, slanted differently. But the light is weaker since the part of the earth that's having cold weather is tilted further from the sun. Did I mention that the earth is tilted? So that way, one hemisphere is tilted closer to the sun during one side of the orbit, and the other hemisphere gets the seasons during the opposite time of year (other side of the orbit.)

OK, like imagine that this percent mark % represents the northern and southern hemispheres. Imagine that the % mark is traveling in a circle around a central sphere. So on one side of the circle, the upper 0 is tilted toward the sun (spring and summer) and the lower 0 is on the other side of the tilted line and it's further from the sun. But when the % gets to the other side of the circle, the *upper* 0 is on the far side of the tilted line and then the *lower* 0 is closer to the sun. Which gives you seasons.

I guess it gets lighter and darker faster because there's less clouds in fall and winter (it's colder, so there's less smog and haze and cloud cover in general) so dawn and dusk seem to happen faster. Plus, there's less light and heat in general.

I hope that made sense. The % thing makes sense to me, but if it doesn't, then make yourself a 3D model and see if it makes sense.

Answer 2

This has to do with the tilt of the earth's axis. The link below gives this explanation. You'll have to go to the link to see the figure which makes it easier to understand. "While the Earth rotates once a day about its axis between the north and south poles, it revolves about the Sun in its orbit but once a year. The seasons are caused by the simple fact that the Earth's axis of rotation is not perpendicular to the plane of its orbit. Rather, the Earth's axis is tilted some 23°.5 away from the perpendicular, as shown in the figure (which is NOT to scale).