ADD TEXT TO A SPHERE IN BLENDER

Add- Mesh – UV sphere

Add- Text 

Edit mode – short cut-press Tab key

To edit the Text.

Change the Alignment to Horizontal- center and Vertical - Middle

Scale the Sphere so that it fits in with the Text

Rotate the Text by pressing – RX-90 to rotate 90 degree.

Select the Text and UV Sphere and go to edit mode

Select the following Under

-Mesh - Knife project

Hide the text and can view the text profile mesh created on the sphere.

Select the Text 

Extrude it Using Extrude Region 

Once extruded it is done.