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19 Aug 2024 - 04:22 am

Johannes Kepler thought he sketched Mercury orbiting across the sun. What he actually captured has solved a solar mystery
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German astronomer Johannes Kepler made sketches of sunspots in 1607 from his observations of the sun’s surface — and centuries later, the pioneering drawings are helping scientists solve a solar mystery.

Even though everything in the solar system revolves around the sun, scientists have yet to unlock many of the star’s secrets.
However, studying the variability of the sun over time, including the solar cycle, could answer some of the most longstanding questions about the fiery orb and how it changes.
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Some of those questions revolve around solar activity in the 17th century, which was a pivotal time for studying the sun.

Astronomers observed sunspots with telescopes for the first time in 1610. At the same time, the sun was making an unusual transition into an extended period of weakened activity. And Kepler’s long disregarded sketches, overlooked because they were drawings rather than telescopic observations, could provide crucial historical insights.

A new study that recreates the circumstances during which Kepler made his drawings appeared on July 25 in The Astrophysical Journal Letters.

“Kepler contributed many historical benchmarks in astronomy and physics in the 17th century, leaving his legacy even in the space age,” said lead study author Hisashi Hayakawa, assistant professor at Nagoya University’s Institute for Space-Earth Environmental Research, in a statement.

“Here, we add to that by showing that Kepler’s sunspot records predate the existing telescopic sunspot records from 1610 by several years. His sunspot sketches serve as a testament to his scientific acumen and perseverance in the face of technological constraints.”

The sun’s tumultuous activity
The sun experiences an 11-year cycle of waxing and waning activity, known as the solar cycle. Currently, scientists believe that the sun is reaching or nearing solar maximum, the annual peak of its activity for the current solar cycle, called Solar Cycle 25.

Solar maximum is typically associated with an increase in the number of sunspots visible on the sun’s surface. These dark regions, some of which can reach the size of Earth or larger, are driven by the sun’s strong and constantly shifting magnetic fields.

Today, scientists track solar activity using data from ground and space-based observatories, magnetic maps of the solar surface, and ultraviolet observations of the sun’s outer atmosphere.

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18 Aug 2024 - 09:22 pm

The Hidden Wiki: A Comprehensive List of Tor Sites
The Dark Web has always been a mysterious and intriguing aspect of the internet for many users. This hidden corner of the internet is known for its anonymous nature and the ability to access websites and services that are not available on the regular internet. However, navigating the Dark Web can be challenging, especially without the proper resources. That's where the Tor network comes in.

Tor is a secure and anonymous network that enables users to browse the internet without being tracked or identified. The network uses several layers of encryption to ensure that user data is protected throughout the browsing experience. However, to access the Dark Web, users need specific URLs that are not available on regular search engines. This is where Tor .onion URLs and directories come into play.

Tor .onion URLs are unique and cannot be accessed using regular web browsers. They can only be accessed using Tor networks. These URLs are a series of random characters, making them challenging to remember. This is where directories come into play. Directories are websites that aggregate .onion URLs and categorize them based on their content.

The Hidden Wiki is one of the most popular directories on the Dark Web. It contains links to a wide range of Tor sites, from forums and marketplaces to blogs and news sites. The Hidden Wiki is updated regularly, offering users fresh and relevant content.

Another useful resource for Tor users is the Tor Wiki. The Tor Wiki is a community-run encyclopedia of Tor-related topics, including tutorials on how to use the network Tor Sites 101: Your One-Stop Shop for the Best Onion URLs


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