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Perseverance rover captures solar halo on Mars for the first Perseverance rover captures solar halo on Mars for the first

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Perseverance rover captures solar halo on Mars for the first time

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The Perseverance rover has spotted a solar halo on Mars, the first time such a phenomenon has been recorded outside of Earth. According to scientists, it is created by micrometer-sized hexagonal crystals of water ice in the atmosphere of the Red Planet. The article was published in Geophysical Research Letters.

Perseverance rover captures solar halo on Mars for the first time

The phenomenon of the atmospheric halo is well known to the inhabitants of the Earth – it occurs around bright sources of light, such as the Sun or the Moon, due to the scattering and refraction of light on ice crystals in the Earth’s troposphere. The earth’s halo can take on a wide variety of forms – rings, arcs or spots. In the case of Mars, simulation data show that the particles of the Red Planet’s ice clouds can be micrometer-sized complex polyhedrons that resemble terrestrial cirrus clouds and can create conditions for the formation of a halo for an observer on the surface of Mars. However, this phenomenon has never been recorded before in the atmosphere of the Red Planet.

A team of planetary scientists led by Mark Lemmon of the Space Science Institute in Boulder reported the first recorded solar halo on Mars on the morning of December 15, 2021. Observations were carried out for 3.3 hours using the cameras of the Perseverance rover, which operates in the Lake crater near the planet’s equator.

The halo on Mars appears as a circle within 22 degrees of the Sun and has been observed in cold and cloudy weather. According to scientists, it could be created by ice ice crystals in the form of hexagonal prisms (or columns), measuring up to more than 11 micrometers in length and in diameter. The crystals were originally located at altitudes of 40–50 kilometers, and during the observation period they could descend to heights of 3–12 kilometers.

The researchers concluded that the clouds that form a halo on Mars are quite rare due to the high levels of water saturation required, but can be common in the northern subtropical regions of the planet in midsummer.

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Components

666 W and two potentially dangerous 12VHPWR connectors at once. Galax GeForce RTX 4090 HOF unveiled

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666 W and two potentially dangerous 12VHPWR connectors at once

Galax has fully introduced the GeForce RTX 4090 HOF graphics cards.

There are two models: OC Lab and OC Lab Plus. But in any case, we are talking about the most powerful RTX 4090 on the market and, as a result, the most productive graphics card in general. True, with a caveat.

666 W and two potentially dangerous 12VHPWR connectors at once.  Galax GeForce RTX 4090 HOF unveiled

The fact is that the novelty has two modes of operation. The standard GPU frequency is 2520 MHz for both versions. In Performance mode, the core frequency of OC Lab rises to 2595 MHz, while for OC Lab Plus it already reaches 2625 MHz. And that’s lower than the Asus ROG Strix OC or MSI Suprim Liquid at 2640 MHz. But here the power limit in this mode rises to a symbolic 666 watts. At what frequencies the GPU will work in this mode in real conditions, it is not clear, so we need to wait for the tests. But from the point of view of the power limit, there is no equal to the novelty. By the way, 666 W is more than the allowable 600 W for the new 12VHPWR connector. But everything is explained simply: the new Galax products have two such connectors. True, this means that the risk of incorrectly connecting the power is doubled.

666 W and two potentially dangerous 12VHPWR connectors at once.  Galax GeForce RTX 4090 HOF unveiled

As for the rest, we can note the complete display and a length of 344 mm.

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Gaming

The new game from the creator of the BioShock series is very similar to BioShock. And a little on Atomic Heart

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The new game from the creator of the BioShock series

At the last The Game Awards 2022 ceremony, the first trailer of the debut game of the Ghost Story Games studio was shown. Its founder is Ken Levin, the “father” of the BioShock series. The new project is called Judas, and it’s very similar to BioShock.

The new game from the creator of the BioShock series is very similar to BioShock.  And a little on Atomic Heart

The plot unfolds on board a spaceship, which is gradually being destroyed. The hero is a character named Judas, who needs to find a way to escape, and for this he will have to unite with his worst enemies.

The game promises a non-linear and variable plot with several endings, different options for passing, and so on. It is noteworthy that the game looks and feels very similar to BioShock. It has the aesthetics of retrofuturism, superpowers and elements of phantasmagoria. For example, the hero can install implants in his hand to use fire or electric attacks. It also reminds a lot of Atomic Heart, which was also shown at TGA.

At the moment, it is not reported when the game will appear. But there is already a list of platforms – PC, PlayStation 5, Xbox Series X and Series S, that is, only on modern solutions.

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Components

Even the $900 RX 7900 XT is enough to compete with the $1200 GeForce RTX 4080. There are tests in 3DMark

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Even the 900 RX 7900 XT is enough to compete

As we learned today, reviews of the Radeon RX 7900 video cards will be published on December 12th. But the first tests in normal benchmarks appeared today.

Even the $900 RX 7900 XT is enough to compete with the $1200 GeForce RTX 4080.  There are tests in 3DMark

Both of AMD’s new products lit up in 3DMark. Unfortunately, in the Fire Strike and Time Spy tests, which are quite old, it is still much better than the results in Geekbench.

True, the results of AMD’s new products themselves look debatable. In Time Spy at 4K, there is almost no difference between the RX 7900 XTX and RX 7900 XT, and both cards perform roughly on par with the GeForce RTX 4080.

In Fire Strike, the younger RX 7900 XT is already successfully fighting the RTX 4080, and the older RX 7900 XTX is about 10% faster. Relative to the RX 6950 XT, AMD’s new flagship provides a gain of 25-30%, which is rather modest. And this can be written down as a minus for AMD’s new products, especially against the background of the catastrophically more powerful RTX 4090.

Even the $900 RX 7900 XT is enough to compete with the $1200 GeForce RTX 4080.  There are tests in 3DMark

Even the $900 RX 7900 XT is enough to compete with the $1200 GeForce RTX 4080.  There are tests in 3DMark

However, keep in mind the prices. The RX 7900 XT, which in both tests is quite suitable for a direct competitor to the RTX 4080 in terms of performance, is cheaper than the Nvidia card by $300 or 25%! And against this background, the lag behind the RTX 4090 is completely irrelevant. And if you calculate the ratio of performance and price, AMD’s new products look much better than the same RTX 4090, not to mention the RTX 4080.

Of course, in games the situation may be somewhat different, especially since these 3DMark tests are very old. But here it is worth noting that, if you look at the comparison of the RTX 30 and RX 6000 cards, the balance of power roughly corresponds to what the cards show in games.

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