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.
Footnotes. 1  The synodic period of the moon, or synodic month, is the orbital period of the moon with respect to the sun. Since lunar phases depend upon the relative positions of the sun, moon, and earth, the synodic month is the period over which the moonâs phases repeat.