Definition of dayside in English:

dayside

noun

Astronomy
  • The side of a planet that is facing its primary star.

    • ‘We detected the increase in brightness as the dayside of the planet rotated into view.’
    • ‘While the average temperature on Mars is about - 55C, Martian surface temperatures range from as little as - 133C at the winter pole to almost 27C on the dayside during summer.’
    • ‘After two days the balloon entered the dayside of Venus and expanded and burst due to solar heating.’
    • ‘The magnetic field of the CME merges with the magnetic field on the dayside of Earth, transferring enormous amounts of energy to the magnetosphere in the process.’
    • ‘While the nightside may be just a few hundred degrees Celsius, the planet's dayside is probably well over 1000 degrees hotter’

Pronunciation

dayside

/ˈdeɪsʌɪd/