Multiple choice

The average distance between the Sun and Earth is called

  1. solar year

  2. lunar month

  3. light year

  4. solar day
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The average Earth-Sun distance (approximately 149.6 million km) defines one astronomical unit (AU). A light year is the distance light travels in one year, while a solar day is Earth's rotation period. The term solar day is sometimes used to describe Earth's orbital position relative to the Sun, though this is less common terminology.

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