Semidiameter (Noun)
Meaning
The apparent radius of a celestial body when viewed as a disc from the earth.
Classification
Nouns denoting attributes of people and objects.
Examples
- Astronomers calculate the semidiameter of the moon by measuring its apparent angular size from the Earth.
- The observer carefully measured the semidiameter of the planet as it transited across the face of the star.
- Using a telescope, the team was able to measure the semidiameter of Jupiter in the night sky.
- Comparing the semidiameter of the Sun at sunrise and sunset can help astronomers understand atmospheric refraction.
- The semidiameter of Venus varied slightly as it passed through the Earth's atmosphere due to distortion effects.