According to astrophysicist Avi Loeb, the total solar events witnessed by observers won’t last forever. The moon recedes about 1 inch per year from the Earth, a slow orbital drift that will eventually alter how humans experience eclipses from the surface of our planet.
Why Total Solar Eclipses Have an Expiration Date
In the far distant future, the moon will move far enough away from the Earth so that it no longer completely covers the sun during a total solar eclipse, according to Harvard University professor Avi Loeb. Speaking on “Elizabeth Vargas Reports,” Loeb explained that the moon will be farther and will cover only a portion of the sun, meaning humans won’t be able to see a total eclipse 600 million years from now.
How the Moon’s Movement Changes Earth’s Days
More than 4 billion years ago, researchers theorize that a planetary body or multiple objects collided with Earth, leading our planet to acquire its lunar companion. The ensuing debris formed the moon, and its gravitational pull directly affects the Earth’s oceans and the speed at which our planet spins. According to Loeb, if you go back in time, the moon was closer to Earth. In fact, 150 million years ago, a day on Earth had only 23 hours. Since then, as the moon moved away from Earth, it slowed down the speed of the planet’s rotation.
Recent Eclipse Visibility and Partial Alignments
Millions of individuals flocked to Spanish municipalities to witness the nation’s first total solar eclipse in more than 100 years, as a recent total solar eclipse tracked across a restricted path in the Northern Hemisphere spanning northern Russia, Iceland, Greenland, select regions of Portugal, and Spain. Meanwhile, people in other geographic areas could see a partial eclipse from their specific viewing angles, though they missed out on full totality.
Did you know? The moon drifts away from the Earth at a rate of about 1 inch every year. This gradual shift is steadily lengthening the duration of an Earth day by slowing down planetary rotation.
Frequently Asked Questions
Will we still have solar eclipses in the future?
Yes, but millions of years from now, they will only be partial eclipses because the moon will be too far away to completely block the sun’s disk.
How fast is the moon moving away from Earth?
According to astrophysicist Avi Loeb, the moon recedes at a rate of about 1 inch per year.
Did the moon always orbit at its current distance?
No. Scientists note that the moon was much closer to Earth billions of years ago, which resulted in faster planetary rotation and shorter days in Earth’s ancient past.
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