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单词 periapsis
释义

Definition of periapsis in English:

periapsis

nounPlural periapses ˌpɛrɪˈapsɪsˌperēˈapsis
Astronomy

  • The point in the path of an orbiting body at which it is nearest to the body that it orbits.

    Example sentencesExamples
    • For objects orbiting Earth, periapsis and apoapsis are known as perigee and apogee; for objects orbiting the Sun, these locations are known as perihelion and aphelion.
    • At periapsis [closest approach to Saturn] it's about 40 kilometers per second [90,000 miles per hour].
 
 

Definition of periapsis in US English:

periapsis

nounˌperēˈapsis
Astronomy

  • The point in the path of an orbiting body at which it is nearest to the body that it orbits.

    Example sentencesExamples
    • At periapsis [closest approach to Saturn] it's about 40 kilometers per second [90,000 miles per hour].
    • For objects orbiting Earth, periapsis and apoapsis are known as perigee and apogee; for objects orbiting the Sun, these locations are known as perihelion and aphelion.
 
 
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更新时间：2025/11/4 17:24:06