On September 2, 2035, a total solar eclipse will be visible from the Korean Peninsula. When I told my students this, one responded: “Teacher, I’ll be 28 then!” I replied: This is the kind of chance that comes once in a lifetime [1].
How a Solar Eclipse Works
A solar eclipse occurs when the Moon passes between the Sun and Earth, blocking the Sun [1]. A cosmic coincidence: the Sun is 400 times larger than the Moon, but also 400 times farther away. So they appear nearly the same size in the sky — and that’s why total solar eclipses are possible.
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3 Types of Solar Eclipses
Not all solar eclipses are equal. The type you experience depends on your location relative to the Moon’s shadow and the Moon’s distance from Earth at the time.
- Total eclipse — The Moon completely covers the Sun’s disk. Observers inside the umbra experience totality. The solar corona becomes visible, the sky darkens to twilight, and stars appear in daytime. Totality can last up to 7 minutes 32 seconds at maximum [1].
- Partial eclipse — The Moon covers only part of the Sun. Observers lie within the penumbra. The Sun appears as a crescent.
- Annular eclipse — The Moon is near apogee so its apparent disk is slightly smaller than the Sun’s. The Sun’s edge remains visible as a brilliant ring of fire. Solar filters must be worn throughout [2].
A fourth rarer type, the hybrid eclipse, begins as annular and transitions to total along the path due to the curvature of Earth’s surface.
Phenomena During Totality
Baily’s Beads and the Diamond Ring Effect
Just before and after totality, sunlight streams through valleys and craters on the Moon’s limb, creating a necklace of bright beads. Named after Francis Baily who described them in 1836, these beads last only seconds. The last bead to disappear produces the Diamond Ring Effect: a brilliant flash of light against the darkened sky [2].
The Solar Corona
The corona — the Sun’s outer atmosphere — is normally invisible, outshone by the photosphere by a factor of a million. During totality, the corona blazes into view as a pearly white halo extending several solar radii. Its complex streamers and plumes reflect the Sun’s magnetic field configuration. Solar physicists travel the globe chasing eclipses specifically to study the corona without a coronagraph [3].
Shadow Bands
In the minutes before totality, faint rippling bands of light and shadow may appear on pale flat surfaces. Caused by atmospheric turbulence refracting the thin crescent of remaining sunlight, shadow bands remain not fully understood scientifically.
The Scientific Value of Solar Eclipses
In 1919, Eddington used a total solar eclipse to observe the bending of light near the Sun, confirming Einstein’s general theory of relativity [3]. Solar eclipses are among the most important natural phenomena in the history of science.
Beyond relativity, eclipses enabled other breakthroughs: helium was identified in the solar spectrum during the 1868 eclipse before it was found on Earth; coronal mass ejections have been mapped during totality; eclipse observations helped refine lunar orbit models. Modern eclipse science focuses on coronal heating — why the corona is millions of degrees hotter than the photosphere below it.
Eclipse Chasing Tips
Eclipse chasers — umbraphiles — travel worldwide to stand within the narrow totality path, typically 100–160 km wide. Planning tips for first-timers:
- Book accommodation on the centerline for maximum totality duration
- Research historical cloud cover data for your chosen location
- Have a backup location within driving distance in case of weather
- Arrive the day before — eclipse day traffic near popular sites is severe
- Bring ISO 12312-2 certified eclipse glasses; remove them only during totality
Upcoming Total Solar Eclipses
| Date | Type | Path | Max Duration |
|---|---|---|---|
| Aug 12, 2026 | Total | Greenland, Spain, N. Africa | 2m 18s |
| Aug 2, 2027 | Total | Morocco, Egypt, Saudi Arabia | 6m 23s |
| Jul 22, 2028 | Total | Australia, New Zealand | 5m 10s |
| Nov 25, 2030 | Total | Botswana, South Africa | 3m 44s |
| Sep 2, 2035 | Total | China, Korean Peninsula, Japan | 2m 54s |
The 2027 eclipse over Egypt is notable — at over 6 minutes it will be one of the longest of the century. For Korean Peninsula residents, the 2035 event is the one to plan for now [1].
Safe Viewing
Never look at the Sun with the naked eye. Use only eclipse glasses certified to ISO 12312-2. Naked-eye viewing is only safe during the brief minutes of totality when the corona is visible. As soon as any photosphere reappears, replace your glasses immediately.
Disclaimer: This article is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with any questions about a medical condition.
Your Next Steps
- Today: Pick one idea from this article and try it before bed tonight.
- This week: Track your results for 5 days — even a simple notes app works.
- Next 30 days: Review what worked, drop what didn’t, and build your personal system.
Last updated: 2026-03-17
About the Author
Written by the Rational Growth editorial team. Our health and psychology content is informed by peer-reviewed research, clinical guidelines, and real-world experience. We follow strict editorial standards and cite primary sources throughout.
References
- Espenak, F., & Meeus, J. (2006). Five Millennium Canon of Solar Eclipses. NASA/TP-2006-214141.
- Tarbuck, E. J., & Lutgens, F. K. (2017). Earth Science. Pearson.
- Dyson, F. W., et al. (1920). A determination of the deflection of light by the sun’s gravitational field. Philosophical Transactions, 220, 291-333.