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The terrifying 'spider on Mars' finally explains after two decades

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The Landlord
Post time 2021-4-8 04:13:42 | Show the author posts only Reply Awards |Descending |Read mode



NASA's Mars Reconnaissance Orbiter captured a "spider" image at the southern pole of ลองเล่นสล็อตฟรี Mars on May 13, 2018. © Space NASA's Mars Reconnaissance Orbiter captured a "spider" at Mars' south pole on May 13, 2018.Ziggy plays guitar and a scientist in the UK plays with big chunks of dry ice to find out what's behind a bizarre form of so called aliens. "Spider on Mars" Those patterns, seen in satellite imagery of the Red Planet's south pole, are not real spiders. But the black shapes carved on the Martian surface are creepy enough for researchers to call them. "araneiforms" (meaning "spider-like") were discovered two decades ago after their shape.

Measured as far as 3,300 feet (1 km), the shape is enormous, unlike anything else on Earth. But in a new study published March 19 in the journal Scientific Reports, scientists succeeded in creating a shrinking spider in a lab using a carbon dioxide ice sheet. (Also known as dry ice) and Mars atmosphere simulators. When cold ice is exposed to much warmer Mars-like sediments, part of the ice immediately changes from solid to gas. (A process known as sublimation) forms a leak formed cracks through which the escaped gas is pushed through the ice.
This research presents the first set of empirical evidence for surface processes thought to alter polar landscapes on Mars,

said Lauren McKeown, a planetary scientist at the British Open University in a statement. Directly that the spider pattern we observed on Mars from orbit can be carved by directly converting dry ice from solid to gas.Mars' atmosphere contains more than 95% of carbon dioxide (CO2), according to NASA data, and many of the ice and frost that form around the planet's poles in winter are also made of CO2. Mars spiders can form in spring when sunlight penetrates the translucent CO2 ice layer and heats the ground below. The heat caused the ice to sublimate from its base, creating pressure under the ice until it finally broke. The paint-up gas escaped through a crack in its plume, leaving behind a visible zigzag spider leg pattern seen on Mars today, the team hypothesized.Until recently, scientists were unable to test such a hypothesis on Earth,

where atmospheric conditions differ greatly. But in the new study, researchers created a little bit of Earth on Earth using a device called the Open University Mars Simulation Chamber. The claw machine you see in a local arcade to hold the dry ice over the grain. The team adjusted the chamber to mimic the Martian atmosphere, then gradually reduced the dry ice block onto the grains.The experiment proved that the spider sublimation hypothesis was valid. Regardless of the pellet size, dry ice tends to sublimate when it comes into contact with them and the escaping gases push upward, leaving spider-like cracks along the way. According to the researchers, spider legs branch more when the seeds are finer and less when the seeds are coarser.Although it cannot be concluded. But these experiments are the first physical evidence showing how spiders on Mars might have formed. Now, it's not that great.

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