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Earth’s Days Will Eventually Reach 25 Hours — but Not Anytime Soon, Scientists Say

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Scientists say claims that Earth’s days are about to become 25 hours long are misleading, though the underlying science is real. The length of a day is slowly increasing due to natural processes, but the change unfolds over hundreds of millions of years, not within any human timescale.

A standard day lasts about 24 hours, or 86,400 seconds, but its exact length varies by milliseconds. These tiny fluctuations are measured using atomic clocks and are known as the length of day (LOD). Variations are caused by factors such as Earth’s internal dynamics, ocean circulation and, most importantly, the Moon.

Researchers explain that the Moon’s gravity creates ocean tides, and the friction generated by those tides acts as a brake on Earth’s rotation. Over very long periods, this tidal interaction transfers rotational energy away from Earth, gradually slowing its spin and making days longer.

Scientists at the University of Toronto note that if the Earth–Moon system continues evolving as it has, days could eventually reach about 25 hours in length. However, this would likely take around 200 million years to occur.

In short, Earth is not about to experience longer days in any practical sense. While the planet’s rotation is slowing, the change is so gradual that it remains completely imperceptible to daily life and modern timekeeping.

Scientists Confirm Date of the “Solar Eclipse of the Century,” Visible From Spain in 2027

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Astronomers have confirmed that the longest solar eclipse of the 21st century — often dubbed the “eclipse of the century” — will occur on August 2, 2027, and parts of southern Spain will be among the places able to witness it.

According to calculations cited by NASA, the total solar eclipse will last up to 6 minutes and 23 seconds at its maximum, making it the longest total eclipse of this century. Events of this duration are extremely rare and will not occur again until 2114.

The length of totality will vary by location. In Spain, the eclipse will be visible primarily in southern Andalusia, including areas such as Málaga and Cádiz, though totality there will last for a shorter period than in regions closer to the center of the eclipse path.

The eclipse will begin over the Atlantic Ocean near the Strait of Gibraltar and move across North Africa, passing through Morocco, Algeria, Tunisia and Libya before reaching Egypt, where the city of Luxor is expected to offer optimal viewing conditions with more than six minutes of total darkness.

Astronomers say the event will provide a rare opportunity for both scientific observation and public viewing, as long-duration total eclipses allow extended study of the Sun’s corona and other solar phenomena.

Scientists Detect Unprecedented Jet Behavior in 3I/ATLAS Using Hubble Data

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Scientists have identified a previously unseen astrophysical phenomenon in the object known as 3I/ATLAS, after analyzing new observations from the Hubble Space Telescope. The data reveal an unusual pattern of anti-correlated jet flipping, a behavior that challenges simpler models of how energetic outflows operate in space.

In most jet-producing systems, such as active galactic nuclei or X-ray binaries, twin jets emerging from opposite poles behave symmetrically. In 3I/ATLAS, however, researchers observed that changes in one jet are mirrored by opposite behavior in the other. When one jet shifts direction or intensity, the opposing jet responds inversely rather than in sync.

This phenomenon, described as a jet “flip” or oscillation, suggests a highly ordered and rotationally controlled system. Scientists say the effect points to a central engine governed by strong rotation, where angular momentum plays a key role in regulating how energy is released.

The precision of the jet behavior indicates the likely presence of a massive compact object — such as a black hole or neutron star — surrounded by an extremely active accretion disk. Interactions between gravity, spin and magnetic fields appear to generate a gyroscopic effect that stabilizes the jets despite underlying instabilities.

Researchers say the findings mark a significant advance in astrophysics, showing that jet dynamics can be highly structured rather than chaotic. By studying these oscillations, scientists can infer previously inaccessible parameters, including the system’s inclination angle and the precession speed of its rotational axis.

The discovery offers a new window into how energy propagates through galaxies and reinforces the idea that even in extreme cosmic environments, rotation and balance play a fundamental role in shaping the universe.