launch window

[launch window] {n.}, {Space English}, {informal} 1. A period oftime when the line-up of planets, Sun, and Moon are such as to makefavorable conditions for a specific space launch.

The mission wascanceled until the next launch window which will be exactly six weeksfrom today.

2. A favorable time for starting some kind of ambitiousadventure.

My next launch window for a European trip isn't untilschool is over in June.