Happy Perihelion 2015!

Just a quick note to let you know that tonight marks the point where the Earth is closest to the Sun all year: perihelion. The moment this happens is at 06:36 UTC Jan. 4, 2015. That translates to 01:36 Eastern US time, or 10:36 p.m. Pacific time on Jan. 3. So technically, this happens tomorrow for people on the east coast, but today for those of us in Mountain and Pacific time. Living on a round ball can be weird. At that time, the center of the Earth will be 147,096,204 kilometers (91,401,343 m...