How can I make the sun look bigger when view from Earth?

[AlexChan]

It's seem smaller than we see from eye, isn't it?
How can I change it?

[selden]

The Sun is drawn at exactly the right size. If you want it to look larger, you need to change the field of view shown by Celestia.

The size of Sun and Moon is described in the Preliminary Users FAQ. It's a sticky near the top of the Celestia Users Forum. (this one). Please read Q/A #7.