Here's how the full moon helped free the stuck ship Ever Given in the Suez Canal

A satellite image showing the Ever Given in the Suez Canal on March 29, 2021, as the boat became free.
A satellite image showing the Ever Given in the Suez Canal on March 29, 2021, as the boat became free. (Image credit: Satellite image ©2021 Maxar Technologies)

It took a little help from the full moon to free the massive Ever Given cargo ship from its perch stranded in the Suez Canal.

For nearly a week, the boat debacle took the internet by storm: a 1,300-foot-long (400 meters) container ship had gotten wedged into a key trading passageway, blocking all traffic. A digger, dwarfed by the massive boat, came to scratch away at the canal's sides, an allegory of every quixotic attempt we make to manage the behemoth crashes in our own lives.

Even from space, on the International Space Station and 250 miles (400 kilometers) above the fray, all eyes turned to the Ever Given. Russian Cosmonaut Sergey Kud-Sverchkov, who has been living and working in the orbiting laboratory since October, even shared images snapped from his orbital vantage point of the now-notorious Ever Given stuck in the Suez Canal.

Satellite photos: The huge ship stuck in the Suez Canal is visible from space

"One of the most discussed news is the incident in the #SuezCanal," Kud-Sverchkov wrote. "One of the world's largest container ships #EverGiven has blocked one of the world's busiest shipping lanes. Specialists are making every effort to restore shipping. You can see it now from the @SpaceStation."

Satellites also monitored the situation, naturally.

Copernicus Sentinel-1 images taken on March 21, 2021, before Ever Given was stuck, and on March 25 show the build-up of ships waiting to pass through the Suez Canal. (Image credit: Contains modified Copernicus Sentinel data (2021), processed by ESA, CC BY-SA 3.0 IGO)

The European Space Agency released images from its Copernicus Sentinel-1 satellite comparing typical Suez Canal traffic with the situation on Thursday (March 25), when a traffic jam had built up behind the splayed ship. According to the Associated Press, it may take as long as 10 days for the backlog to clear.

Meanwhile, satellites operated by the U.S. company Maxar watched as rescue efforts came to fruition, with both WorldView-2 and GeoEye-1 satellites from the company offering views of the Ever Given and its surrounding tugboats in the late morning of today (March 29).

Russian cosmonaut Sergey Kud-Sverchkov shared images taken from the International Space Station of the Ever Given cargo ship stuck askew in the Suez Canal on March 27, 2021. (Image credit: Roscosmos/NASA)

But the view of those tugboats had a helping hand from some celestial mechanics. After all, the Suez Canal, like so many other bodies of water, rises and falls with the tides, a side effect of Earth's relationship with our cosmic neighbors.

Tides are most extreme when the Earth aligns with both the sun and the moon, the two objects that exert the strongest gravitational pull on our planet. (Because water moves most easily in response to this pull, the tides are the most obvious response to this gravitational tugging.) When there's a full moon or moon is in its new phase, its gravitational pull adds onto that of the sun, resulting in more dramatic high and low tides, according to the National Oceanic and Atmospheric Administration (NOAA).

And the moon was full on Sunday (March 28). Even better for the stranded ship, as the moon was simultaneously relatively close to Earth in its orbit; it will reach the closest point, called perigee, on Tuesday (March 30). Perigee can also accentuate the extreme tides caused by full and new moons, according to NOAA.

Those factors mean that the moon really lined up to give the Ever Given a much-needed boost. According to the New York Times, the Suez Canal may have seen water levels about 18 inches (46 centimeters) higher than usual.

"We were helped enormously by the strong falling tide we had this afternoon," Peter Berdowski, CEO of Boskalis, the salvage firm charged with freeing the Ever Given, told The Associated Press. "In effect, you have the forces of nature pushing hard with you, and they pushed harder than the two sea tugs could pull."

And now, thanks to the moon, the infamous Ever Given is on the go again.

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Meghan Bartels
Senior Writer

Meghan is a senior writer at and has more than five years' experience as a science journalist based in New York City. She joined in July 2018, with previous writing published in outlets including Newsweek and Audubon. Meghan earned an MA in science journalism from New York University and a BA in classics from Georgetown University, and in her free time she enjoys reading and visiting museums. Follow her on Twitter at @meghanbartels.