Comet Ison’s perihelion is today November 28th, 2013. & Ison will be passing Earth on December 16th, 2013 on its way back. The linear distance from Earth to sun is 148,800,000 kms (93,000,000 miles). OK, Ison won’t be approaching us in a straight line, but rather would be travelling along a hypotenuse. But let’s assume a straight line of 148,800,000, so Distance travelled in one … Continue reading Comet Ison In Seconds