History

Famous Eclipses in History

From battles ended to relativity confirmed

Landmark · Science

May 29, 1919

Einstein Confirmed by Starlight

Arthur Eddington led two simultaneous expeditions — one to Príncipe island off the coast of West Africa, the other to Sobral in northeastern Brazil — to photograph stars near the Sun during a total solar eclipse. The goal: test whether the Sun's gravity bent light, as Einstein's general theory of relativity predicted.

The measurements matched Einstein's predictions precisely. When the results were announced at the Royal Society in London in November 1919, it made front pages worldwide. Albert Einstein became a household name overnight. It remains one of the most consequential scientific observations in history.

Published in Philosophical Transactions of the Royal Society, 1920. Totality: 6 min 51 sec over the Atlantic.

Landmark · Ancient World

May 28, 585 BC

The Eclipse That Ended a War

The Battle of Halys had been raging for five years between the Medes and the Lydians in what is now Turkey. On May 28, 585 BC, the sky suddenly went dark. Both armies, believing the gods were demanding a halt, laid down their weapons. The war ended immediately — and a peace treaty followed.

The Greek philosopher Thales of Miletus had reportedly predicted the eclipse — the earliest known scientific forecast in recorded history. Whether or not the prediction was exact, the event demonstrated that eclipses follow natural laws. This single episode marks the transition from supernatural explanation to rational astronomy.

Recounted by Herodotus, Histories, Book I. Independently corroborated by modern astronomical back-calculation.


Complete Eclipse Timeline

763 BC · June 15
The Assyrian Clay Tablet

A cuneiform inscription from ancient Nineveh records "day turned to night" — a total solar eclipse preserved on clay for over 2,700 years. It is the oldest reliably dated astronomical event in history. Modern historians use this eclipse as a precise anchor point to date Assyrian kings, battles, and Biblical events in the 8th century BC.

The tablet belongs to the Assyrian Eponym Chronicle. The eclipse is cross-referenced with Amos 8:9 ("I will make the sun go down at noon").

585 BC · May 28
Thales and the Battle of Halys

During the Battle of Halys between the Medes and the Lydians, a total solar eclipse darkened the sky mid-battle. Both armies interpreted it as a divine omen and immediately ceased fighting. Thales of Miletus had reportedly predicted the eclipse, making it one of the earliest recorded scientific forecasts in history.

Herodotus, Histories, Book I. The eclipse was independently confirmed by back-calculation in the 19th century.

840 AD · May 5
The Death of an Emperor

Holy Roman Emperor Louis the Pious witnessed a total solar eclipse and, filled with terror at what medieval tradition held to be a divine portent, fell into a severe decline. He died just two months later. Frankish chroniclers linked the eclipse directly to his death. Multiple medieval sources record the event as proof of celestial punishment.

Recorded in the Annales Bertiniani. Path of totality crossed central Europe including what is now Germany and France.

1133 · August 2
King Henry's Eclipse

A total solar eclipse plunged England into darkness on the same day King Henry I of England crossed the Channel on his final voyage home. The Anglo-Saxon Chronicle described the sky "becoming so dark that the stars were visible at noon." Henry died two years later, and medieval writers — always alert to omens — tied the eclipse to the end of his reign.

Known in historical literature as "King Henry's Eclipse." Totality lasted around 4 minutes over northern England and Scotland.

1504 · February 29
Columbus and the Lunar Eclipse

Stranded in Jamaica for over a year, Christopher Columbus used his astronomical almanac — calculated by Abraham Zacuto — to predict a total lunar eclipse. He warned the Taíno people that his god would punish them by making the moon disappear. When the Blood Moon rose exactly as he foretold, the terrified Taíno immediately agreed to supply his crew with food. Columbus revealed the moon's "return" once his demands were met.

The eclipse lasted 48 minutes at maximum. Columbus's tactic ended a year-long standoff with local populations.

1715 · May 3
Halley Maps the Shadow

Edmond Halley — of comet fame — successfully predicted a total solar eclipse visible across England and distributed printed maps showing the path of totality in advance. It was the first time the public could follow a predicted eclipse track. Halley himself observed from London, and compared observations from across the country to refine Newton's gravitational theory and map the Moon's shadow with unprecedented accuracy.

Halley's prediction was accurate to within 4 minutes and a few kilometres. He later published a correction for the next English eclipse of 1724.

1868 · August 18
A New Element in the Sun

During a total solar eclipse visible from India and Southeast Asia, French astronomer Jules Janssen and British scientist Norman Pogson independently detected an unknown spectral line in the solar corona — a wavelength that matched no element known on Earth. The element was named helium, after Helios, the Greek sun god. It wasn't isolated on Earth until 1895, 27 years later, when William Ramsay found it trapped in a uranium mineral.

The only element first discovered on another celestial body before being found on Earth. Janssen's observations from Guntur, India were decisive.

1919 · May 29
Einstein Confirmed

Arthur Eddington's expeditions to Príncipe and Sobral photographed stars near the Sun during totality. The measured deflection of starlight matched Einstein's general theory of relativity exactly. The announcement at the Royal Society in November 1919 made Einstein world-famous overnight.

Philosophical Transactions of the Royal Society, 1920. Totality: 6 min 51 sec. Path crossed West Africa and South America.

1973 · June 30
The Concorde Eclipse

A specially modified Concorde prototype chased the Moon's shadow across the Sahara at twice the speed of sound, keeping scientists inside totality for 74 uninterrupted minutes. Ground-based observers had a maximum of 7 minutes. The experiment allowed astronomers to study the solar corona and the chromosphere in extraordinary detail — experiments impossible from any fixed location. It remains the longest artificially extended totality in history.

The aircraft was Concorde 001, flying at Mach 2.05 at 17,000 metres. The shadow crossed West Africa and the Atlantic.

1991 · July 11
The Hawaii–Mexico Eclipse

One of the longest total solar eclipses of the 20th century — up to 6 min 54 sec of totality — crossed the Pacific, Hawaii and Mexico at a time when Mauna Kea's world-class observatories were perfectly positioned in the path. Hundreds of thousands gathered in Baja California. The eruption of Mount Pinatubo in the Philippines just weeks earlier put fine ash in the upper atmosphere, giving the corona an unusually vivid appearance.

Maximum totality near La Paz, Baja California, Mexico. One of the best-observed solar eclipses of the century.

1999 · August 11
The European Eclipse

The last total solar eclipse of the 20th century swept across Europe — Cornwall, Normandy, Stuttgart, Salzburg, Bucharest, Istanbul — drawing an estimated 350 million viewers across the continent. The path of totality was 112 km wide, but partial phases were visible from Iceland to India. It was the most-watched eclipse in history up to that point.

Maximum totality: 2 min 23 sec near Reims, France. Millions gathered on Dartmoor, the beaches of Brittany and the Carpathian hills.

2017 · August 21
The Great American Eclipse

The first total solar eclipse to cross the continental United States coast-to-coast since 1918. The path of totality stretched from Oregon to South Carolina over 2,500 km. An estimated 215 million Americans watched some portion — the most-viewed natural event in US history. NASA's live stream reached over 40 million viewers. Eclipse glasses sold out weeks in advance and traffic jams extended 80 km from prime viewing sites.

Path: Oregon → Idaho → Wyoming → Missouri → Tennessee → South Carolina. Maximum totality: 2 min 42 sec near Hopkinsville, Kentucky.

2024 · April 8
North American Total Solar Eclipse

A total solar eclipse swept from Mexico through 13 US states — Texas, Arkansas, Indiana, Ohio, Vermont — and into Atlantic Canada. Totality lasted up to 4 min 28 sec near Torreón, Mexico, the longest path through North America in decades. Dallas, Indianapolis, Cleveland and Montréal all experienced full totality. NASA estimated 31.6 million people lived inside the path of totality.

Maximum totality: 4 min 28 sec near Torreón, Mexico. The next total solar eclipse over the US will be in August 2044.