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Richardjal

19 Aug 2024 - 06:22 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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19 Aug 2024 - 04:24 am

Beyond the Surface: Exploring the Depths of Tor's Deep Web
Are you excited to explore the mysterious world of the Dark Web? Look no further than the Tor network, and the abundance of resources available on the Tor Wiki. With a plethora of fresh Tor .onion urls and onion links, you'll find everything you're looking for and more.

For those unfamiliar with Tor, it's a free and open-source software designed to protect user privacy online. By routing internet traffic through a series of servers, Tor makes it nearly impossible for anyone to trace the origin of the connection or intercept any exchanges. This makes Tor an ideal tool for those seeking anonymity, such as journalists, activists, and those in oppressive regimes.

On the flip side, the Tor network has also become a hub for illegal activities, from drug trafficking to hacking services. But that doesn't mean there isn't valuable information and resources to be found on the network.

Enter the Tor Wiki. This "Hidden Wiki" serves as a directory of Tor sites and resources, offering a wide range of both legal and illegal content. However, it's important to note that not all sites listed on the Tor Wiki are trustworthy or safe to access.

That's where directories such as the Dark Wiki and Tor Link Directory come in handy. These directories categorize and organize Tor links, making it easier to navigate the network and avoid any potentially harmful sites.

So what can you find on the Tor Wiki? A little bit of everything. From forums discussing politics and current events, to marketplaces offering everything from drugs to counterfeit The Ultimate List of Tor .onion URLs: The Hidden Wiki




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