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NASA detects strange magnetic impulses on Mars




(Newser)

Notice a strange magnetic impulse? You must be on Mars around midnight. At the very least, it detects NASA's landing inSight while probing the planet for clues in its history, National Geographic reports. The robotic geophysicist – who records tremors, measures the temperatures of the earth, etc. – also says that there is far more magnetism in the earth's crust than expected. "We get an idea of ​​the magnetic history of Mars in a way we've never had before," says a planetary geologist. First, a primer: every Earth and Mars has a magnetic field. The Earth is caused by a liquid, iron-rich outer core that has been displaced for a very long time. Unfortunately, the Mars field collapsed about four billion years ago and has become a much weaker version of itself.

This meant that it could no longer protect Mars from solar radiation or from the solar wind that was destroying much of the planet's atmosphere. Now InSight claims that Mars' magnetism is approximately 20 times stronger than expected, suggesting that its magnetic field has lasted longer than scientists have predicted. As for impulses, they appear strangely at midnight local time. Maybe that's because the solar wind, when it hits the planet's thin atmosphere, creates a weak magnetic bubble that compresses into a tail shape ̵

1; and InSight equates to that tail at midnight. InSight has also found an electrically conductive layer far below the surface of Mars, which can be a wide reservoir of water about 2.5 miles thick, for Big Think. And that can mean life, either present or long gone. (Read more stories about Mars.)

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