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perigee
This term is a precise astronomical designation used to describe the closest approach of a celestial body to Earth. It carries a clinical, scientific connotation and is almost exclusively found in textbooks, orbital mechanics reports, or amateur astronomy discussions. It is the direct counterpart to apogee, which describes the furthest point.
As a technical noun, it refers to a specific point in space rather than a duration of time. While it is a countable noun, it is frequently used in the singular because most orbits have only one perigee point per revolution.
Ý nghĩa
Ví dụ
Tides are often stronger when the moon is at perigee.
The spacecraft reached perigee at exactly midnight.
The spacecraft reached perigee at exactly midnight.
I wonder if the perigee will make the supermoon look brighter.
The orbit is highly elliptical, making the distance at perigee very small.
We need to calculate the velocity of the probe at perigee.
The lunar perigee occurs roughly every twenty seven days.