Chaka Chowala
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Chaka chowala ndilo gawo la kutalika komwe limagwiritsidwa ntchito pofotokoza kutalika kwa zakuthambo ndi makilomita 9,5 trillion kapena 5,9 trillion mailosi. Monga momwe tafotokozera ndi International Astronomical Union (IAU), chaka chowunika ndilo mtunda umene kuwala kumayenda mu chingwe chimodzi cha Julian (masiku 365.25).[1] Chifukwa limaphatikizapo mawu oti "chaka", mawu akuti chaka chowala nthawi zina amamasuliridwa mofanana ngati gawo limodzi.
Chaka chowala nthawi zambiri chimagwiritsidwa ntchito pofotokozera kutalika kwa nyenyezi ndi kutalika kwina pamagalactic, makamaka m'mabuku a sayansi ndi odziwika bwino. Chipangizo chomwe chimagwiritsidwa ntchito kwambiri mu katswiri wa astrometry ndi parchik (chizindikiro: pc, pafupifupi 3.26 zaka-kuwala; mtunda womwe umodzi wa zakuthambo umagwiritsa ntchito mphindi imodzi ya arc).