Science & Nature · 2
What is the average distance from Earth to the Sun called?
Answer
Astronomical Unit
The Astronomical Unit (AU) is the mean distance from Earth's center to the Sun's center, approximately 149.6 million kilometers (92.96 million miles). Astronomers use the AU as a standard measurement for distances within the solar system, making it easier to compare planetary orbital distances. Light takes approximately 8.3 minutes to travel one AU. The AU was formally defined in 2012 as exactly 149,597,870.7 kilometers. This unit helps scientists comprehend the vast scales of the solar system and is used in orbital mechanics and planetary science.
💡 Did you know?
Mercury orbits at about 0.39 AU, Earth at 1 AU, Neptune at 30 AU—the AU scale makes solar system distances easier to compare.
Other options people guess
- Light-year
- Parsec
- Aphelion
Topics
- astronomy
- solar-system
- units
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