Definition
A circle whose center moves along the circumference of another circle, used in ancient astronomy to explain planetary motions.
Etymology
From Greek 'epi' (upon) + 'kyklos' (circle). Ptolemy and other ancient astronomers invented this concept around the 2nd century CE to account for the apparent retrograde motion of planets without accepting a sun-centered solar system.
Kelly Says
Before we knew planets orbited the sun in ellipses, astronomers thought they moved in circles-on-circles—like a wheel rolling on another wheel—which actually worked surprisingly well for predictions, even though it was fundamentally wrong!
Translations
AMአማርኛ
እንግሊዝኛ
en-g-li-z-nya
ARالعربية
دائرة خارجية
da-i-ratu-khari-yah
BNবাংলা
অপি সাইক্ল
o-pi-sa-ik-la
CACatalà
epicycle
e-pi-si-kel
CSČeština
epicyklus
e-pi-si-klus
DADansk
epicycle
e-pi-si-kel
DEDeutsch
Epizyklos
e-pi-zy-klos
ELΕλληνικά
επίκυκλος
e-pi-kyklos
ESEspañol
epíciclo
e-pee-si-klo
FAفارسی
دایره بیرونی
da-i-reh-e-be-ro-nee
FISuomi
epicycle
e-pi-si-keli
FRFrançais
épicycle
e-pi-si-kle
GUGU
એપીસાઈકલ
e-pi-sai-kal
HAHA
epicycle
e-pi-si-kel
HEעברית
גלגל חיצוני
galgal chatzni
HIहिन्दी
अपरदृश्य
a-par-dris-hya
HUMagyar
epicycle
e-pi-si-kel
IDBahasa Indonesia
epicycle
e-pi-si-kel
IGIG
epicycle
e-pi-si-kel
ITItaliano
epicycles
e-pi-si-kle
KKKK
epicycle
e-pi-si-kel
KMKM
ក្នុងស្រឡាញ់
k-nung-sra-la-ny
KO한국어
에피사이클
e-pi-sai-keul
MRMR
एपिसायकल
e-pi-sai-kal
MSBahasa Melayu
epicycle
e-pi-si-kel
MYမြန်မာ
အပြင်ဘက် ရုပ်
a-pyin-ba-the-ru-p
NLNederlands
epicyclus
e-pi-si-klus
NONorsk
epicycle
e-pi-si-kel
PAPA
એપીસાઈકલ
e-pi-sai-kal
PLPolski
epicykl
e-pi-si-kl
PTPortuguês
epíciclo
e-pee-si-klo
RORomână
epicycle
e-pi-si-kel
RUРусский
эпицикл
e-pi-si-kl
SVSvenska
epicycle
e-pi-si-kel
SWKiswahili
epicycle
e-pi-si-kel
TAதமிழ்
வெளி வட்டம்
ve-li-vat-tam
TEతెలుగు
బాహ్య వృత్తం
ba-hya-vrit-tan
TLTL
epicycle
e-pi-si-kel
UKУкраїнська
епіцикл
e-pi-si-kl
URاردو
بیرونی دائرہ
beer-o-nee da-i-rah
VITiếng Việt
epicycloid
e-pi-si-klo-id
YOYO
epicycle
e-pi-si-kel
ZUZU
epicycle
e-pi-si-kel