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Total Solar Eclipse: Why don't we have them constantly?

  • Writer: Mr.Spience
    Mr.Spience
  • Apr 9, 2024
  • 2 min read

With regard to the solar eclipse that occurred yesterday, have you ever wondered why solar eclipses don't happen every day, every month, or every year, while the moon continually orbits our planet? Let's unravel this cosmic puzzle with a closer look at the orbits of the Earth and the Moon!


Solar eclipses occur when the Moon moves between the Earth and the Sun, casting its shadow onto our planet. However, not every New Moon leads to a solar eclipse due to the intricacies of celestial geometry.


Here are the reasons why we don't have frequent solar eclipses:



  • Elliptical Orbit of the Moon: The Moon orbits the Earth in an elliptical path, not a perfect circle. This means that the distance between the Moon and Earth varies during its orbit. When the Moon is farther away (at apogee), its apparent size is smaller compared to the apparent size of the Sun, making it more challenging for the Moon to fully cover the Solar disk during a solar eclipse.

  • Orbital Inclination: The Moon's orbit is tilted by about 5 degrees relative to Earth's orbit around the Sun. This inclination means that during most New Moons, the Moon's shadow either passes above or below Earth, missing the Sun.


  • Eclipse Seasons: Solar eclipses occur approximately every 173.3 days. However, not all of these occurrences result in visible solar eclipses due to the position and inclination of the Moon in its orbit. For example, during a potential eclipse season, the Moon may be positioned to the side of Earth or behind it relative to the Sun, which can prevent a visible solar eclipse from occurring.



  • Path of Total Solar Eclipse: The path where a total solar eclipse is visible is relatively narrow, often extending only a few hundred kilometers on the Earth's surface. This means that specific locations may not observe a solar eclipse despite its occurrence. Considering that our planet is covered 70.9% by water, it is possible that the Moon's shadow falls on areas where the phenomenon cannot be observed.

Despite these factors, solar eclipses continue to adorn our sky, although their visibility varies depending on different regions. To enjoy this cosmic spectacle, stay informed about upcoming eclipse predictions and consider visiting a suitable observation location!


The dance of the Sun, Moon, and Earth continues to inspire wonder and awe.


Keep looking up, and you may be rewarded with the stunning view of a solar eclipse in the future!


Happy observing!

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