1. Open the material, use the elliptical selection tool and hold down shift to draw a perfect circular selection.
2. Go to the Path panel and change the selection into a working path.
3. Select the text tool and enter text on the path
4. Ctrl+T, hold down ctrl+alt, and drag the anchor point in the upper left corner with the mouse to perform perspective transformation.
5. Press ctrl+R to open the ruler, and drag out the auxiliary lines from the upper and left rulers (the auxiliary lines are close to the edge of the earth)
6. Use the elliptical selection tool and hold down shift to draw a circular selection of the earth from the intersection of the auxiliary lines.
