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词汇 Apparent solar time
分类 英语词汇 英语翻译词典
释义

Apparent solar time

原声例句
TED-Ed（视频版）

The equation of time, introduced by Ptolemy and later refined based on the work of Johannes Kepler, converts between apparent solar time and the mean time we've all come to rely on.

“均时差”概念，由托勒密发明后来由约翰尼斯·开普勒进行的改良，包含了太阳时间和平均时间的差距，是我们现在主要使用的时间概念。

中文百科

太阳日 Solar time

（重定向自Apparent solar time）
在顺行轨道上的行星，像是地球，恒星日会比太阳日短。如图：在时间1，一颗遥远的恒星和太阳都在正上方；在时间2，行星转了360°，遥远的恒星在正上方（1→2 =恒星日），但是要再晚一点，在时间3的位置上太阳才会在正上方（1→3 =太阳日）。
The equation of time—above the axis a sundial will appear fast relative to a clock showing local mean time, and below the axis a sundial will appear slow.
Sun and Moon, Nuremberg Chronicle, 1493

太阳日（英语：solar day）是依据太阳运动，所定义的时间，可以分为视太阳日和平太阳日。

一太阳日传统称为一“日”、一“天”或一“昼夜”。

英语百科

Solar time 太阳日

（重定向自Apparent solar time）
On a prograde planet like the Earth, the sidereal day is shorter than the solar day. At time 1, the Sun and a certain distant star are both overhead. At time 2, the planet has rotated 360° and the distant star is overhead again (1→2 = one sidereal day). But it is not until a little later, at time 3, that the Sun is overhead again (1→3 = one solar day). More simply, 1-2 is a complete rotation of the Earth, but because the revolution around the Sun affects the angle at which the Sun is seen from the Earth, 1-3 is how long it takes noon to return.
The equation of time—above the axis a sundial will appear fast relative to a clock showing local mean time, and below the axis a sundial will appear slow.
Sun and Moon, Nuremberg Chronicle, 1493

Solar time is a reckoning of the passage of time based on the Sun's position in the sky. The fundamental unit of solar time is the day. Two types of solar time are apparent solar time (sundial time) and mean solar time (clock time).
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