Naked Science Forum

Life Sciences => The Environment => Topic started by: mdigweed on 14/02/2006 15:25:36

Title: Seasons
Post by: mdigweed on 14/02/2006 15:25:36

As we head toward Spring...we hope....have we always had seasons?

ta

Martin

Doh!

Title: Re: Seasons
Post by: another_someone on 14/02/2006 17:29:49

The Earth's seasons is predominantly caused by the tilt of the Earth's axis, and to a lesser extent by the eccentricity of the Earth's orbit around the Sun.  As far as I am aware, the Earth always has had a tilt to its rotational axis (although the amount of that tilt does vary), and always has had some eccentricity to its orbit around the Sun, and thus the Earth must always have had some sort of seasons.

Ofcourse, the exact nature of those seasons has varied, just as it still varies in different parts of the world.

George.