Earth's Closest Approach to the Sun: Does the Date Change?

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SUMMARY

The Earth reaches its closest point to the Sun, known as perihelion, on January 3rd each year. This date does vary over time, but the change occurs very slowly, with a cycle of approximately 27,000 years. The variations in the dates of perihelion, aphelion, equinoxes, and solstices are influenced by factors such as leap years. For detailed information on these variations, refer to the United States Naval Observatory's data.

PREREQUISITES
  • Understanding of astronomical terms such as perihelion and aphelion
  • Basic knowledge of Earth's orbital mechanics
  • Familiarity with the concept of leap years
  • Access to astronomical data sources, such as the United States Naval Observatory
NEXT STEPS
  • Research the long-term variations in Earth's perihelion and aphelion dates
  • Explore the effects of leap years on astronomical events
  • Study the impact of axial tilt on equinoxes and solstices
  • Investigate the historical changes in Earth's orbit over millennia
USEFUL FOR

Astronomy enthusiasts, educators, and students interested in understanding Earth's orbital dynamics and seasonal changes.

Ulysees
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What time of the year is the Earth closest to the sun?

Does this time vary?
 
Astronomy news on Phys.org
According to wiki, the Earth is closest to the Sun on Jan 3rd. And this time will vary but very slowly (period of about 27000years)
 
Thanks for the info.
 

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