Reply To: Seven is the number of perfection

[Ingmar Franz]

Thank, @procyonlotor, for your explanations 😀! The last one especially pleases me as amateur astronomer 🔭🌞🌕🪐🌌!

There’re also the seven main colors in a rainbow 🌈 (see e.g. here) and in music a scale has seven tones 🎶.