[Cool effects]

Are you referring to something like this?

This is a known bug involving the large battery packs. I believe it was fixed on version 0.19.1

[Where did you hear of KSP?]

xkcd.

The KSP is on the mouseover text.

[[Tutorial] Interactive Illustrated Interplanetary Guide and Calculator]

I measured it (printscreen + draw rectangle around it), and its shape is perfect circle, just Sun is not in center.

Kepler's first law:

"The orbit of every planet is an ellipse with the Sun at one of the two foci."

Maybe the measurement isn't precise enough. The orbit is either a perfect circle with Kerbol in the center or a ellipse with one focus on the sun. Other situations would be physically impossible.

[[0.17] XMatter Co. - Hi-tech space equipment (Now with Cupola Module)]

Google zem if you don't believe so!

I don't believe so.