But the advice is mixed for summer flights. âI would suggest buying your airfares for summer as soon as you can,â said Krista Pappas, global travel industry director for Bing, citing high fuel prices, tight seating capacity and strong consumer demand as a recipe for rising rates.
A sidereal period is also defined as the position of an object with respect to the stars. The synodic month is a bit longer than the sidereal month. When a synodic month lasts 29 days, 12 hours, and 44 minutes, a sidereal month lasts 27 days, 7 hours, and 43 minutes.
What the previous three answerers said is correct. Calculating the solar day from the year and the sidereal day is one of those synodic period kind of jobs. solar day = 1 / [ 1 / (sidereal day) - 1 / year ] 86400 sec = 1 / [ 1 / (86164 sec) - 1 / (31556926 sec) ]