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Apple has a 160 USB C cable Apple has a 160 USB C cable

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Apple has a $160 USB-C cable

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A notable new addition to the range of Apple accessories is a $160 USB-C cable. Such expensive cables still need to be looked for, but one feature serves as an excuse for this: it supports Thunderbolt 4 / USB 4 interfaces, and the length is 3 meters.

Apple has a $160 USB-C cable

Cables of well-known brands that are similar in functionality are 2 meters long, so Apple has a kind of record product in its niche. The cable provides a bandwidth of 40 Gb / s, allows you to transfer 8K video to a connected monitor or TV, as well as transfer 100 watts of power to power the same MacBook Pro.

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BMW breaks new iPhones. iPhone 15 Pro and 15 Pro Max NFC module fails due to wireless charging in car

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BMW breaks new iPhones iPhone 15 Pro and 15 Pro

While Apple promises to fix the overheating problem of the new iPhone 15 Pro and 15 Pro Max, without reducing performance, another problem has emerged with the company’s new products. It turned out that BMW cars can actually break smartphones.

BMW breaks new iPhones.  iPhone 15 Pro and 15 Pro Max NFC module fails due to wireless charging in car

Several owners of Bavarian cars have already reported that the NFC module in their new iPhone 15 Pro and 15 Pro Max has failed. This happens after smartphones are charged via wireless charging in the car.

During charging, smartphones go into data recovery mode. A reboot helps return the devices to working condition, but the NFC modules do not restore functionality. In particular, the Could Not Set Up Apple Pay error appears in the Wallet app.

In some cases, owners have already replaced their smartphones at Apple stores, but it is not yet clear what the cause of this problem is. So far, complaints have only come from owners of older new Apple products, which suggests that the problem may be related to overheating.

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Astronomers have captured the light of a spatial web connecting galaxies

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Astronomers have captured the light of a spatial web connecting

Such images reveal valuable information about how galaxies form and evolve, and help track the location of elusive dark matter, which makes up about 80% of the mass of the Universe.

In 2014, astronomers captured the first image of the cosmic web based on the radiation from a quasar, an object billions of times more massive than our Sun and considered one of the brightest objects in the Universe. In 2019, another study used data from young, forming stars to provide a proxy for the cosmic web. Now, astronomers have directly captured its light at a distance of 10 to 12 billion light years away.

According to cosmological models, more than 60% of the hydrogen created after the Big Bang approximately 13.8 billion years ago collapsed and formed spatial structures, which in turn collapsed and formed the cosmic web of filaments that we see today – threads of cosmic matter consisting from dust and gas. These filaments connect galaxies and enable their growth and star formation. Although this is just speculation, previous research has also suggested that galaxies form where these filaments intersect.

Astronomers have captured the light of a spatial web connecting galaxies

Using data from the Keck Cosmic Web Imager, the scientists created an image that shows “a three-dimensional cross-section of a network of filaments of hydrogen gas crossing the space between galaxies.” Source: Caltech/R. Hurt

To take the latest image of intersecting filaments, the team used data from the telescope. Keck, installed at the observatory on the Mauna Kea volcano in Hawaii. The device is configured to detect radiation from hydrogen, which is the main component of the cosmic web. The resulting 2D images were then combined into a 3D map based on the detected radiation emanating from the cosmic web.

To notice these faint emissions, the team first had to deal with the problem of light pollution. The dim light of the cosmic web can easily be confused with the light of the Hawaiian sky, atmospheric aurora, and even the light of our Milky Way.

So the team decided to take photographs of two different parts of the sky at different distances. The scientists then took the background light from one image and subtracted it from the other, and vice versa. As a result, only the web’s filament network remained, as simulations predicted in 2019.

Images like those produced in the new study can help scientists better understand how galaxies form and evolve over eons.

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The mass of the Milky Way turned out to be 5 times less than previously thought

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The mass of the Milky Way turned out to be

One way to determine the mass of a galaxy is to study its rotation curve, measuring the speed of the stars in the galaxy depending on their distance from the galactic center. The speed at which a star rotates is proportional to the amount of mass in its orbit, so using the rotation curve of a galaxy, you can plot the distribution of the mass function over the radius and get an idea of ​​​​the total mass of the galaxy. Scientists have measured rotation curves for several nearby galaxies, such as Andromeda, so they know the masses of many galaxies very accurately.

But because we’re inside the Milky Way itself, we don’t have a good view of the stars throughout the galaxy. There is so much gas and dust towards the center of the galaxy that we can’t even see the stars on the far side. So instead, scientists measure the rotation curve using neutral hydrogen, which emits faint light at a wavelength of about 21 centimeters. This is not as precise as measuring stars, but it still gave a general idea of ​​the mass of our galaxy.

The mass of the Milky Way turned out to be 5 times less than previously thought

Distribution of stars in the galaxy according to the Gaia survey. Source: NASA/JPL-Caltech/R. Hurt

Astronomers also studied the movements of globular clusters rotating in the halo of the Milky Way. From these observations, the best estimate of the Milky Way’s mass is about one trillion solar masses, with small uncertainties.

This new study is based on the third dataset from the Gaia spacecraft. It contains information on the positions of more than 1.8 billion stars and the movements of more than 1.5 billion stars. Although this is only a fraction of the estimated number of stars in our galaxy, which is between 100 and 400 billion, it is a large enough number to calculate an accurate rotation curve.

That’s exactly what the team of scientists did. The resulting rotation curve is so accurate that the team was able to determine Kepler’s law for the outer region of the Milky Way, where the velocities of stars begin to decline, consistent with Kepler’s law, since virtually all of the galaxy’s mass is closer to the galactic center.

Kepler’s Law allows the team to place a clear upper limit on the mass of the Milky Way. And what they found was quite surprising. The best fit to the data estimated the mass at about 200 billion solar masses, a fifth of previous estimates. The absolute upper limit for the Milky Way’s mass was 540 billion solar masses, which means the Milky Way is at least half as large as previously thought. And given the known normal matter in the galaxy, this means that the Milky Way contains significantly less dark matter.

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