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31 Aug 2024 - 03:52 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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30 Aug 2024 - 09:47 pm

Roland Garros is loud ahead of epic clash between Rafael Nadal and Novak Djokovic. Here's how to watch.
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The first match of the day is about to get going at Court Philippe-Chatrier here at Roland Garros and it is going to be an electric afternoon in the Paris sunshine.

Today’s first contest is a second-round encounter in the women’s tournament between France’s Diane Parry and Poland’s Iga Swiatek. While the home nation’s crowd will certainly be behind Parry, it’s the second clash on the schedule that has everyone’s mouths watering.
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Rafael Nadal, the ‘King of Clay’ and 14-time winner of the French Open held annually on this court, is the sentimental favorite. Nadal has endeared himself to the Paris faithful over the years with his dominance of the French Open and is attempting to make one final run for gold on what could potentially be one of his last runs on these famous clay courts as he alludes to a career which is slowly winding down.

Meanwhile, for Novak Djokovic — the winner of 24 grand slams, the most all-time in the men’s game — Nadal is a major obstacle to the one title he hasn’t won: an Olympic gold medal. The Serb has been open about his desire to win his first gold.

Nadal eked out a win in three sets on Sunday in his first-round match while Djokovic cruised on Saturday in his opening contest. The Spaniard has fought injuries for much of the last two years and his opponent will be favored — but there’s just something different about the Spaniard playing on Roland Garros’ clay.

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30 Aug 2024 - 09:46 pm

The latest on the Paris Olympics
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The Olympic tennis tournament is underway, but the red clay of Roland Garros is missing some of the sport’s biggest stars, including world no. 1 Jannik Sinner.

While some are sidelined by illnesses and injuries, others are abstaining as a result of the professional circuit’s brutal schedule this summer.

Between the French Open, Wimbledon and the US Open, summer is always a busy season for those chasing an elusive Grand Slam title. Though the rest of the sports world sees the Olympics as the ultimate competition, the Games’ anthem falls flat amidst the prestigious yearly summer tournaments in Paris, London and New York.
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Ben Shelton, the rising 21-year-old US star ranked No. 14 in the world, said the Olympics fall at a tough time in the tournament schedule, as he will be coming off a stint in Europe and wants to prepare for the US Open.

“Having to go back to Europe to play on clay, a different surface – it kind of messes up a few lead-up tournaments to the US Open that I would play if I wasn’t playing the Olympics,” Shelton told reporters in the spring.

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