What does a sextile mean?
Two planets sixty degrees apart, which is two signs, and usually read as a mild version of the trine. The traditional reading is an opportunity rather than a gift: something that helps if you act on it and quietly does nothing if you do not. Because it is a softer aspect, most astrologers allow it a smaller orb than a conjunction or an opposition, so it has to be closer to count at all.
Where you see this in OrbHeaven
Your own chart is calculated from your birth details, and this definition is written out again there with your numbers in it rather than in the abstract. The chart, the glossary and thirty days of dated timeline are free, and nothing here is charged per question.
About a minute. Birth time optional, and no account until after you have seen it.
How the planets get on
Aspects, and the arithmetic that decides whether one counts.