earth atmosphere?

just wondering what is the best way to go about making an atmosphere for earth, i already have a texture for the planet, just no idea on how to make an atmosphere.

Maybe something like this
http://www.molblend.gmxhome.de/planet.jpg
It’s just a 3 minute try after reading your post, so it’s improveable

A single vertex as Halo in the center (known, of course)
A second sphere slightly larger than the planet.
Material:alpha 0.000, Ztrans.
Cloud texture Csp, Mir, Ref, Alpha, Mix
Second texture: Blend–Sphere; Nor (coordinates), ZZZ, Col, Alpha, Sub, color Black

This has been covered using numerous methods several times on this forum. Do a search.

My particular solution can be found here (on page two): https://blenderartists.org/forum/viewtopic.php?t=10805

Good luck,
-Iain