Buy the 2015 Old Farmer's Almanac!
Reporting
Actually, gravity isActually, gravity is generated from the center of any reasonably large body (Sun, Earth, moon, etc.) When the earth spins, it causes centripedal force which causes winds, among other things

2015 Special Edition Garden GuideCooking Fresh with The Old Farmer's AlmanacThe Almanac Monthly Digital MagazineWhat the heck is a Garden Hod?