OAO Orbiting Astronomical Observatory

advanced orbiting solar observatory

先进轨道太阳观测台

advanced orbiting astronomical observatory

高级轨道天文观测台

Maya priests observed the positions of the sun, moon, and stars. They made tables predicting eclipses and the orbit of the planet Venus.

玛雅祭司观察太阳，月亮和恒星的位置。他们用工作台来预知日蚀和行星金星的轨道。

intraplanetary space

行星轨道与太阳间空间

Study on Driving Laws of Sun Synchronous Orbit Satellite's Solar Arrays

太阳同步轨道卫星的太阳帆板驱动律

the time for the earth to make one complete revolution around the sun, relative to the fixed stars.

以恒星为基准测定的地球在环绕太阳的轨道上公转一整周的时间。

(astronomy) having an orbit farther from the sun than the Earth's orbit.

（天文学）距离太阳轨道比距离地球轨道远的。

Study on Orbit Dynamics and Control of Solar-Sail Spacecraft

太阳帆航天器的轨道动力学和轨道控制研究

large orbiting earth resources observatory

大轨道地球资源观测

ancient. sunspot observation

太阳黑子的古代观测

IASY (International Years of the Active Sun)

太阳活动期国际观测年

and follows an orbit round the sun,

它依循一定的轨道绕着太阳运转，

The Earth's path round the sun is elliptical.

地球绕太阳的轨道是椭圆形的。

The path of the earth around the sun is oval.

地球围绕太阳公转的轨道是椭圆形的。

The earth orbits the sun once every 365.25 days.

地球每365.25天绕太阳轨道一周。

The earth orbits the sun once every 3 6 5 . 2 5 days .

地球每３６５。２５天绕太阳轨道一周。

The Solar X-EUV Imaging Telescope Aboard the Geostationary Orbit Satellite;

静止轨道卫星太阳X-EUV成像望远镜

Uses of Solar Radiation for Formation Flying Control Around the Sun-Earth Libration Point

利用太阳光压力进行Halo轨道编队控制