How to make Saturn ring bigger (or any torus)

Question

Is possible to make Saturn ring bigger

Screenshot

I wanted to make the ring bigger

Answer 1

If we define:

$O$ - origin

$A$ - a vertex laying on the X axis, with the smallest positive X value

$B$ - a vertex laying on the X axis, with the largest positive X value

$I$ - a point exactly halfway between A and B

To change the torus'es major radius $|OI|$, without changing the torus'es minor radius $|IA| = |IB|$:

0. Enable Edit Mesh Tools add-on.
1. In Edit Mode select both $A$ and $B$ vertices, F to create an edge connecting them.
2. In N Numbers Panel, Edit tab, click on Edge Tools > Set Edge Length.
3. Hover your digital mouse over Target Length field, CtrlC to copy the value, click outside the popup window to avoid resizing.
4. A Select All, S scale however you want (within reason).
5. Select only the edge created in p. 1.
6. Repeat p. 2.
7. Click on the Target Length field, Home, CtrlV, -, Enter (calculating the difference).
8. Repeat p. 3.
9. Remove the edge created in p. 1.
10. A Select All, AltS to Starve/Feed, click.
11. In the popup, click on the Offset field, CtrlV, /, 2, Enter.

I fear it's not as simple as Chris'es solution.

Answer 2

Select the torus, press S and move your mouse.