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Earth’s interior cooling down faster than expected, study shows why

Published

3 years ago

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Earth’s interior cooling down faster than expected, study shows why

A team of researchers has developed a measurement system that measures the thermal conductivity of Bridgman rocks in the laboratory under the pressure and temperature conditions that prevail in Earth’s interior.

The research has been published in the journal Earth and Planetary Science Letters. The evolution of our planet is the story of its cooling: 4.5 billion years ago, extreme temperatures prevailed on the surface of the young Earth, which was covered by a deep ocean of magma.

Over millions of years, the planet’s surface cooled to form a brittle crust. However, the enormous thermal energy from the Earth’s interior has altered dynamic processes such as mantle convection, plate tectonics and volcanism.

The question that remains unanswered, however, is how fast the Earth is cooling, and how long it will take for this continuous cooling to stop the aforementioned thermally driven processes. One possible answer might lie in the thermal conductivity of the minerals that form the boundary between the core and mantle.

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This boundary layer is relevant because it is here that the sticky rock of the mantle comes into direct contact with the hot iron-nickel melt in the planet’s outer core. The temperature gradient between the two layers is very steep, so there can be a lot of heat flow here. The boundary layer is mainly formed by the mineral Brinell.

Complete News Source : DNA

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Nasa’s old map of Jupiter, which reminds many of dosa, has gone viral once more

Published

2 years ago

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May 25, 2022

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Nasa’s old map of Jupiter, which reminds many of dosa, has gone viral once more

Certain images or videos frequently resurface on the Internet, leaving people speechless. When those clips or pictures are shared again on one social media platform or another, they create a buzz. The National Aeronautics and Space Administration (Nasa) created and posted this image of a map of Jupiter online a few years ago. After being shared on Twitter, the image drew a lot of attention this time. And, as usual, the image made people think of dosa, a popular South Indian dish.

The image was shared by the Twitter account Latest in Space. “From the very bottom of Jupiter, I’m looking up. While tweeting the image, they wrote, “Seen by NASA Cassini.” The images from the Cassini spacecraft’s narrow-angle camera were used to create this out-of-this-world image, which is part of a coloured map series produced by the space agency.

The article was published a few days ago. The tweet has received nearly 20,000 likes since it was shared, and the number is growing. The tweet has been retweeted more than 2,000 times. Take a look at some of the comments to see how the image of Jupiter looks like dosa.

A Twitter user commented, “Looks like a designer dosa.” “When I rush to pick up a call, this is what happens to my dosa on the dosa pan,” one joked. “This is how my mother makes Dosa,” a third said. “Jupiter in the making,” wrote a fourth, along with a photo of someone preparing – you guessed it – dosa.

 

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