Thread:Comments:Stephen Hawking: aliens "almost certain to exist," could invade Earth/Maybe this has not been thought through properly/reply

It is an interesting website. I added it to my favorites bar. Thank you for the info.

A while back, I sent an email to Stephen Hawking which he did not answer. I know he is busy and has health issues. I asked him if electrons only exist because J.J. Thompson invented them? The reason I ask, is because Kepler's equation for planetary orbit does not have an origin. The left side of the equation does not equal the right side of the equation at the origin.

http://www.scientificamerican.com/article.cfm?id=how-do-scientists-measure

How do you connect an imaginary line to the origin of the sun if the origin is not there? I can't find any scientist to answer my question.