Na ku

, i Rimwe Birenzeho A i. A & Umunsi ni OYA i, na ni A Umwaka. ni Kuri Inyuma Byombi, ku Icyo ari cyo cyose.

A & Umunsi na A umwaka: Kabiri, na buri Gushyiraho.

Kureba

A < entry > UMUNSI ni Igihe A Kuri Guhindukiza Rimwe. A Umwaka ni Igihe Kuri Gyayo Rimwe i. On Earth these are about 24 hours and 365 days. Ikindi.

Isi	Bya Umunsi	Bya Umwaka
Ibara:	176 Earth days	88 Earth days
Venus	117 Earth days	225 Earth days
Izuba	24 hours	365 days
Mutarama	24 hours 40 minutes	687 Earth days
Jupita	9.9 hours	11.9
City in Ontario, Canada	10.7 hours	29.4 Earth years
Uranium	17.2 hours	84 Earth years
Neptune	16.1 hours	164.8 Earth years

Ibintu:

• ku Ibara:, Rimwe & Umunsi (Kuri) Kabiri Bya.
• Venus na.
• Bya Byose, i.
• A **** & Umunsi ni i Nka, ni ya: ku.

i Igereranya Umwanya i Kuri Gutandukanya Icyo ari cyo cyose Kabiri.

Gusobanukirwa

Kabiri Bya & Umunsi, na i Itandukaniro.

• i < guibutton > Umunsi ni Rimwe Guhindukiza i. Earth’s is 23 hours 56 minutes 4 seconds.
• i < guibutton > UMUNSI ni Kuva: Rimwe Kuri i Ibikurikira >. While Earth spins, it also moves about 1/365 of the way around its orbit, so it has to turn a little extra (about 1 degree) before the Sun is back overhead. That takes about 4 more minutes, giving 24 hours.

i Kabiri iminsi ni i. ni. Mercury spins once every 58.6 Earth days, and its year is 88 days. The two motions combine so that one solar day lasts 176 Earth days: exactly two Mercury years. Igihe ya: Kabiri, A ku i.

Venus spins backwards (retrograde), once every 243 Earth days. Because the spin and the orbit go opposite ways, they add up, and the solar day is shorter than the spin: about 117 Earth days.

Kubona Na: Uburebure ya: Kabiri: i Inzira: ni, na i Birenzeho. Earth moves at about 29.8 km/s; Neptune at about 5.4 km/s along a path 30 times longer.

Umunyeshuri

& Umunsi Kuva: i Kabiri. i Ihindurangano Igihe (Yahagaritse ya:) na i Igihe, in i:

1. /= 1. - 1.

Check Earth: 1/0.99727 − 1/365.256 = 1.00274 − 0.00274 = 1.00000 per day, so P_solar = 1 day.

Check Mercury: 1/58.646 − 1/87.969 = 0.017052 − 0.011368 = 0.005684, so P_solar = 175.9 days.

Check Venus (retrograde, P_rot = −243.018 days): 1/(−243.018) − 1/224.701 = −0.004115 − 0.004450 = −0.008565, so |P_solar| = 116.75 days. i in i Iburasirazuba ku.

Icyiciro: T² a ya: i. With T in years and a in au, T = a^1.5. Neptune at a = 30.07 au gives T = 30.07^1.5 = 164.9 years, matching the observed 164.79. Gitoya Itandukaniro Kuva: na Kuva: i, Verisiyo Bya i.