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Richardimats

24 Aug 2024 - 08:08 pm

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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23 Aug 2024 - 04:46 am

Elon Musk has been getting Trumpier. A direct line to Trump may be next
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Elon Musk has sought to accumulate political capital commensurate with his extravagant wealth. In the past year, Musk has publicly opined on global conflicts, met with numerous world leaders and US senators to discuss artificial intelligence and his space and satellite technologies. And he has courted senior Chinese officials on their home turf.

Now he is reportedly exploring what could be his next political project: Becoming an adviser to Donald Trump, the presumptive Republican nominee for president, according to a report from the Wall Street Journal.
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Musk has discussed advising Trump should he win the 2024 election, the Journal reported, citing unnamed sources. Musk called Trump directly via cellphone to explore a role that could potentially give Musk significant influence over US policies. It’s not clear based on the Journal’s reporting which party initiated conversations about the potential role.

The Trump campaign did not respond to CNN’s requests for comment; Musk also did not respond to the Wall Street Journal, but Brian Hughes, a Trump campaign spokesperson, told the outlet: “President Trump will be the only voice of what role an individual plays in his presidency.”

Musk pushed back on the Journal report in a post on X Thursday, saying: “There have not been any discussions of a role for me in a potential Trump Presidency.”

However, a potential role in a future Trump administration could expand upon the role that Musk played in the previous Trump administration, when he served on two business advisory councils before quitting them over Trump’s decision to pull out of the Paris climate agreement.

The privilege of whispering in Trump’s ear, should he win reelection, could give the billionaire – who is increasingly steeped in the rhetoric and imagery of the conservative culture wars – even more power on the global stage. Reporting that Musk and Trump’s relationship has improved comes after Musk’s politics have become more aligned with Trump’s.

Musk has made supporting right-wing causes — and extremism, in some situations — increasingly central to his identity. He has vocally opposed Covid-19 lockdowns and embraced anti-vaccine ideology. He has elevated conservative speech on X, the platform formerly known as Twitter that he purchased in 2022. And he has pushed racist conspiracy theories about immigration.