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Days getting longer as moon moves farther, slowing earth’s rotation

Published

8 years ago

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Earth Moon

Days on Earth are getting longer as the moon slowly moves farther away from us, new research shows.

According to the new study was published Monday (June 4) in the journal Proceedings of the National Academy of Sciences, a day on Earth lasted only 18 hours about 1.4 billion years ago.

Scientists believe that when Earth and the moon were barely formed some 4.5 billion years ago, days were only five hours long.

As the moon slowly drifts away from Earth, its influence on our planet’s spin around its axis is waning, thereby making days last longer, said a report on science new portal ZME Science.

“As the moon moves away, the Earth is like a spinning figure skater who slows down as they stretch their arms out,” explains Stephen Meyers, professor of geoscience at the University of Wisconsin-Madison and co-author of the new study published in the Proceedings of the National Academy of Sciences.

The moon is about 4.5 billion years old and is some 239,000 miles (385,000 kilometers) away from Earth, on average. However, due to tidal forces between our planet and the moon, the natural satellite slowly spirals away from Earth at a rate of 3.78cm (1.48in) per year, or at about the same speed at which our fingernails grow. The migration of the Moon away from the Earth is mainly due to the action of the Earth’s tides.

Without the moon, Earth could slow down enough to become unstable, but this would take billions of years and it may never happen at all.

The slowing of earth’s rotation and lengthening of days as the satellite drifted farther away is traceable in the fossil records of some creatures. For instance, the daily growth bands of corals record the number of days that occurred per year in ancient times. By one estimate, days are getting longer at a rate of 19 hours every 4.5 bn years.

Now, using a new method, called astrochronology, Meyers and colleagues were able to devise a novel way to calculate the moon’s influence on the days on Earth. Astrochronology combines astronomical theory with geological observation, allowing researchers to reconstruct the history of the solar system and better understand ancient climate change as captured in the rock record, according to a statement from the University of Wisconsin-Madison, reported Space.com.

“One of our ambitions was to use astrochronology to tell time in the most distant past, to develop very ancient geological time scales. We want to be able to study rocks that are billions of years old in a way that is comparable to how we study modern geologic processes,” said study co-author Stephen Meyers, a professor of geoscience at UW-Madison, in the statement.

The moon and other bodies in the solar system largely influence Earth’s rotation, creating orbital variations called Milankovitch cycles. These variations ultimately determine where sunlight is distributed on Earth, based on the planet’s rotation and tilt.

Earth’s climate rhythms are captured in the rock record, going back hundreds of millions of years. However, regarding our planet’s ancient past, which spans billions of years, this geological record is fairly limited, researchers said in the statement.

This can lead to some uncertainty and confusion. For example, the current rate at which the moon is moving away from Earth suggests that “beyond about 1.5 billion years ago, the moon would have been close enough that its gravitational interactions with the Earth would have ripped the moon apart,” Meyers said.

Using their new statistical method, the researchers were able to compensate for the uncertainty across time. This approach was tested on two stratigraphic rock layers: The 1.4-billion-year-old Xiamaling Formation from northern China and a 55-million-year-old record from Walvis Ridge, in the southern Atlantic Ocean.

Examining the geologic record captured in the rock layers and integrating the measure of uncertainty revealed changes in Earth’s rotation, orbit and distance from the moon throughout history, as well as how the length of day on Earth has steadily increased.

“The geologic record is an astronomical observatory for the early solar system,” Meyers said in the statement. “We are looking at its pulsing rhythm, preserved in the rock and the history of life.”

The new study was published Monday (June 4) in the journal Proceedings of the National Academy of Sciences.

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Oppo Reno 15 likely to launch in India soon with upgraded camera and performance features

Oppo is preparing to launch the Reno 15 series in India, focusing on camera improvements, performance stability and a refined design. Here’s what to expect from its pricing and features.

Published

6 days ago

on

December 8, 2025

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Oppo is gearing up to introduce its Reno 15 lineup in India, with the series expected to focus heavily on enhanced imaging, performance stability and creator-friendly tools. The smartphone, which has already been launched in China, is anticipated to reach the Indian market in the coming weeks although the company has not yet shared an official date.

Expected price range in India

Industry estimates suggest the standard Oppo Reno 15 will fall in the upper-mid price bracket. While the Reno 15 Pro was launched in China at CNY 3,699 (roughly Rs 46,000), the Reno 15 base model is expected to be more affordable, likely between Rs 32,000 and Rs 38,000, depending on RAM and storage configurations.

Expected features and specifications

The Reno 15 series is expected to highlight Oppo’s improvements in sustained performance, camera capabilities and thermal management. Globally, the models run on ColorOS 16 and feature advanced cooling, particularly aimed at gaming and continuous live-streaming use.

For India, the upcoming Oppo Reno 15 is likely to offer:

  • A high-refresh-rate AMOLED display
  • Triple-camera setup with a primary sensor optimized for better low-light clarity
  • Secondary wide-angle and portrait cameras
  • Front camera with autofocus and AI-led enhancements for live streaming
  • Around 5,000mAh battery with fast wired charging support
  • AI-driven system optimization for smoother long-term performance

Design-wise, it is expected to follow the Reno 15 Pro’s flat-frame style, offering a slim profile, improved durability and brighter display output. With growing demand for creator-focused smartphones in the country, the Reno 15 is being positioned for users interested in mobile photography, vlogging and gaming.

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Samsung Galaxy S25 FE India price leak suggests launch similar to S24 FE

Samsung Galaxy S25 FE India price has surfaced online, hinting at a similar launch price as the S24 FE. The phone brings a 6.7-inch AMOLED display, Exynos 2400 chip, triple rear cameras, and a 4,900mAh battery.

Published

3 months ago

on

September 11, 2025

By

Samsung Galaxy S25 FE, which was unveiled globally on September 4, is yet to receive official pricing for the Indian market. However, a fresh leak indicates that the handset could debut in India at the same price point as its predecessor, the Galaxy S24 FE.

Expected price and availability in India

According to tipster Yogesh Brar, the Samsung Galaxy S25 FE may be priced at ₹59,999 for the base 8GB RAM + 128GB storage variant in India. This matches the launch price of last year’s Galaxy S24 FE, which started at ₹59,999 for the same configuration. The higher 8GB RAM + 256GB model of the S24 FE was earlier priced at ₹65,999.

Globally, the Galaxy S25 FE has been introduced at $650 (around ₹58,000) for the base variant and $710 (around ₹63,000) for the 8GB + 256GB version. In India, the smartphone is expected to go on sale in October, similar to last year’s rollout schedule for the S24 FE.

The phone is offered in Icyblue, Jetblack, Navy, and White colour options.

Key specifications

  • Display: 6.7-inch full-HD+ Dynamic AMOLED 2X, 120Hz refresh rate, 1,900 nits peak brightness, Vision Booster, Gorilla Glass Victus+ protection.
  • Processor: Exynos 2400 SoC.
  • RAM & Storage: 8GB RAM standard, up to 512GB UFS 4.0 storage.
  • Rear Cameras: 50MP wide-angle + 8MP telephoto + 12MP ultrawide; 8K video recording at 30fps.
  • Front Camera: 12MP selfie shooter.
  • Battery: 4,900mAh with 45W wired and 15W wireless charging.
  • Build: 7.4mm thick, 190g weight, IP68-rated water and dust resistance.
  • Cooling: 10% larger vapour chamber compared to the Galaxy S24 FE.

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iPhone 17 series launched in India: Price starts at Rs 82,900, goes up to Rs 2.29 lakh

Apple has launched the iPhone 17 series in India with prices starting at Rs 82,900. Pre-booking begins on 12 September, and the phones will be available from 19 September.

Published

3 months ago

on

September 10, 2025

By

iphone 17

Apple has officially launched its much-awaited iPhone 17 series in India, introducing four models – iPhone 17, iPhone 17 Air, iPhone 17 Pro and iPhone 17 Pro Max. The series comes with advanced features, multiple storage variants, and a starting price of Rs 82,900. Pre-bookings will open from 12 September, while sales begin on 19 September.

iPhone 17 and iPhone 17 Air price in India

The standard iPhone 17 is priced at Rs 82,900 for the 256GB base variant. Meanwhile, the iPhone 17 Air, designed with a slimmer and more premium look, starts at Rs 1,19,900.

Key features of iPhone 17

  • Display: 6.3-inch Super Retina XDR OLED, 120Hz ProMotion, up to 3000 nits brightness with Ceramic Shield 2 protection.
  • Camera: Dual 48MP setup (Fusion main + Ultra Wide) with 2X telephoto capability, along with a new Centre Stage front camera.
  • Performance: Powered by the A19 chipset, runs on iOS 26, 40% faster than iPhone 16.
  • Battery: Up to 8 hours longer backup compared to its predecessor.

iPhone 17 Pro and Pro Max price in India

The premium segment begins with iPhone 17 Pro priced at Rs 1,34,900, while the iPhone 17 Pro Max starts at Rs 1,49,900. The top-end Pro Max with the highest storage option goes up to Rs 2,29,900. These models are available in Cosmic Orange, Deep Blue, and Silver colours.

Key features of Pro models

  • Display: iPhone 17 Pro with 6.3-inch and Pro Max with 6.9-inch Super Retina XDR OLED, both featuring 120Hz refresh rate and 3000 nits brightness.
  • Chipset: New A19 Pro with Vapour Chamber Cooling for heavy usage.
  • Camera: Triple 48MP system including an advanced telephoto lens with 8X optical zoom and 40X digital zoom, plus an 18MP front camera.
  • Battery & Charging: Best-ever battery backup on Pro Max, with USB-C fast charging – 50% charge in just 20 minutes.

Why the iPhone 17 series stands out

The new iPhones not only bring improved design and performance but also integrate Apple Intelligence AI features for messaging, calls and visual tools.

Offers and EMI options

  • No-cost EMI: Available for up to 6 months.
  • Cashback: ICICI Bank users can avail up to Rs 5,000 instant cashback.
  • For instance, buying the iPhone 17 Pro Max (Rs 1,49,900) on a 6-month no-cost EMI plan brings effective savings of Rs 11,525, including cashback and EMI benefits.

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