Woman gone with girlies. Hopefully get this out before they are back.
I started with a new doc at 500 x 500.
Two Guides in the center.
They're back, but being nice. Let's continue.
Checked the Grid. I don't know what it was set at, but the Grid was spot on with the Guides and Canvas.
Grabbed the Line Tool and started laying down lines. Two pixels wide with no anti-aliasing.
The horizontal, vertical, and 45 degree ones where easy. Had to guess for the other lines.
Grabbed Circular/Oval Margue.
Held shift + alt and dragged out circles from the center.
Edit > Stroke with 2px in the center.
Deselect and repeat for next circle.
Turned off Grid and Guides.
Still with Circular Margue, I picked a spot in the lower-right and dragged out another circle with shift + alt. This selection is to be off-center, but not too far off.
Filter > Distort > Spherize all the way.
ctrl + shift + i to invert the off-center circular selection.
Hit Delete.
Tada.
Good for a little dressing the next time you are playing around with planets in a HUD or something.