NASA’s InSight Mars probe has recorded seismic and acoustic waves generated by a meteorite impact on another planet for the first time. It happened on September 5, 2021, when a meteor crossed the orbit of Mars, and then crashed into the surface of the planet. If it happened on Earth, then the meteor would most likely burn up in the atmosphere, but in the rarefied air of Mars, it hit the surface, having previously split into three parts. As evidenced by three small craters.
In the video presented by NASA, the whole story of the transformation of a meteor into a meteorite is painted, and the sound itself can be heard at about 56 seconds. The reason the impact sounds weird is because the sound wave from the impact travels through the Martian atmosphere, where, like deserts on Earth, low sounds travel faster than high sounds.
NASA says the InSight studies are helping scientists better understand the composition and structure of the Martian crust and provide a clearer picture of how meteorites shape the Martian surface.
Scientists have topographical evidence of the existence of subglacial lakes on Mars
European planetary scientists have found topographical evidence in images from the Mars Express probe that several subglacial lakes are hidden under the southern polar cap of the fourth planet in the solar system. This discovery contradicts recent statements by their US colleagues that there is no liquid water on Mars, the press office of the University of Cambridge said on Thursday.
“The combination of radar images, computer models, and the topographical evidence we have obtained is a strong argument that at least one region of liquid water exists under the ice cap of the south pole of Mars. If so, then the interior of the planet must remain geothermally active in order to keep this water from freezing.Neil Arnold, a professor at the University of Cambridge (UK), said.
In July 2018, Italian astronomers working with instruments from the European Mars Express probe reported a surprising discovery. They were able to detect on radar images of the south pole of Mars traces of the existence of three subglacial lakes located at a depth of 1.5 km from the surface of the southern ice cap of the planet.
Subsequently, astronomers discovered several more similar anomalies in radar images, which led scientists to actively discuss the nature of these findings. Many planetary scientists immediately doubted these findings and suggested that the instruments of the Mars Express probe discovered deposits of clay or other rocks, and not subglacial lakes of water. This has generated a lot of controversy around radar anomalies.
In particular, at the beginning of 2022, US planetary scientists analyzed images from Mars Express and came to the conclusion that the liquid water reserves discovered by the probe are a kind of “radar mirage”. A group of European astronomers, led by Professor Arnold, have discovered topographical evidence that their fellow skeptics are wrong in their estimates.
As planetologists note, subglacial lakes that exist on Earth have a special effect on the topography of the ice surface in their vicinity. This is due to the fact that these reservoirs reduce the friction force between the base of the glacier and the rocks along which the ice mass moves, as a result of which it “sags” at the point where the under-ice reservoir is invisible to the eye, and then the glacier rises sharply.
Based on similar considerations, Professor Arnold and his colleagues calculated how the glaciers of Mars would behave under similar conditions. Scientists used this information to analyze detailed images of the southern polar cap of the fourth planet in the solar system at the points where Mars Express supposedly discovered subglacial reservoirs.
As it turned out, on the southern polar cap of Mars there are several regions at once with characteristic depressions and rises, similar to how subglacial lakes on Earth influence the topography of the area. The position of many of them coincides with the points where the radars of the Mars Express probe found traces of the existence of lakes. This, according to Professor Arnold and his colleagues, speaks in favor of the fact that liquid water on Mars exists rather than absent.
AMD is preparing a graphics card with 2 GB of memory and a 32-bit bus? Radeon Pro W6300 already registered in the company’s driver
AMD seems to have prepared another ultra-budget graphics card. There was no announcement of the novelty yet, but it has already been registered in the latest driver.
The model is called Radeon Pro W6300, that is, it is a professional accelerator. It has an analogue in the form of a mobile card Radeon Pro W6300M, and you can also expect the appearance of the gaming RX 6300, especially since there have already been rumors about it.
Specifications are not yet known, but it is expected that both professional and gaming new items will receive 2 GB of memory with a 32-bit bus and 768 stream processors. These are the characteristics of the mobile Radeon Pro W6300M. Of course, this is the card of the most basic class, but it is still more productive than most integrated GPUs.
How much such an adapter might cost is anyone’s guess, but an RX 6400 with the same GPU but 4GB of memory and a 64-bit bus costs $160.
NASA “landed” the unique Boeing 747SP SOFIA. For 8 years he watched the universe from the stratosphere
Since first flying in 2007, a Boeing 747SP tail number N747NA, modified by NASA into a large flying telescope, has been circling the stratosphere observing the universe in infrared (just like James Webb). But the work of SOFIA (Stratospheric Observatory for Infrared Astronomy, Stratospheric Observatory for Infrared Astronomy) came to an end: on September 28, a unique aircraft completed its last flight.
The SOFIA project at one time proved to be an innovative way to look at the Universe in the infrared. Unlike ground-based telescopes, which find it difficult to “see” through the water vapor of the earth’s atmosphere, SOFIA observed space from a height of more than 12.5 km, which provided a better view compared to ground-based objects.
The SOFIA project started in 1996. The first flight with a 2.7 m telescope installed on board took place in 2010, but the device was fully operational only in 2014. From 2014 to 2019, the flying observatory completed its five-year mission, but the operation of the unique telescope was extended for another three years. All this time, SOFIA has been observing the Moon, planets, and stars. This telescope was able to detect water on the moon’s sunlit surface in 2020.
2022 has been a very productive year for SOFIA. According to FlightRadar24.com, the 44-year-old aircraft made 143 flights.
So, this year, the stratospheric observatory visited South America for the first time: within two weeks, the telescope was deployed in Chile to observe celestial objects that can only be seen in the latitudes of the Southern Hemisphere.
In July, during a storm in New Zealand, the aircraft received frontal damage due to the displacement of a ladder placed outside. After that, the aircraft returned to the base in Palmdale in California, but later performed several more flights. The project is closed due to the fact that its scientific productivity no longer justifies the operating costs.
Scientists have topographical evidence of the existence of subglacial lakes on Mars
European planetary scientists have found topographical evidence in images from the Mars Express probe that several subglacial lakes are hidden...
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Since first flying in 2007, a Boeing 747SP tail number N747NA, modified by NASA into a large flying telescope, has...
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