I'm trying to design an image of earth 
this is my first  experience test with clouds around the earth 





But what I need as I am an amateur in Terragen 
to design: 
1 - Stars as baground
for example this picture

2 - Sphere as moon with texture 
for example this picture 

and finally 

3 - Satellite as object or picture
Its not easy for me, but this is a good example to do some experiments
Step by step please. thank you