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Origin of long-standing space mystery solved

Published

10 years ago

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London: Researchers from University of Southampton have helped solve a long-standing space mystery – the origin of the “theta aurora”.

Auroras are the most visible manifestation of the Sun’s effect on Earth.

They are seen as colourful displays in the night sky known as the Northern or Southern Lights.

However, auroras can occur at even higher latitudes. One type is known as a “theta aurora” because seen from above it looks like the Greek letter theta – an oval with a line crossing through the centre.

Researchers observed particles in the two “lobe” regions of the magnetosphere.

The plasma in the lobes is normally cold but previous observations suggested that theta auroras are linked with unusually hot lobe plasma.

“We found that the energetic plasma signatures occur on high-latitude magnetic field lines that have been ‘closed’ by the process of magnetic reconnection, which then causes the plasma to become relatively hot,” explained lead author Robert Fear from the University of Southampton.

Because the field lines are closed, the observations are incompatible with direct entry from the solar wind.

“By testing this and other predictions about the behaviour of the ‘theta aurora’, our observations provide strong evidence that the plasma trapping mechanism is responsible for the ‘theta aurora’,” he added.

Previously, it was unclear whether this hot plasma was a result of direct solar wind entry through the lobes of the magnetosphere or if the plasma is somehow related to the plasma sheet on the night side of Earth.

Caused by the solar wind, a stream of plasma – electrically charged atomic particles – “theta aurora” carry their own magnetic field, interacting with the earth’s magnetic field.

The study appeared in the journal Science.

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Apple is giving a huge discount on its gadgets: Details inside

Published

3 years ago

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May 5, 2022

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If you want to buy an iPhone and were waiting for a nice offer, then we have a piece of good news for you! Amazon Summer Sale May 2022 has begun and they are offering major discounts on various smartphones, laptops, and smart TVs, among others.

The sale is live now on the e-commerce platform with no-cost EMI options and exchange discounts on various products. In addition to this, Amazon has also partnered with several banks including ICICI, Kotak Bank, and RBL so that customers get instant discounts of up to 10% using their cards and EMI transactions.

Customers can easily enjoy this summer sale and get massive discounts on iPhones. They can also compare prices on Flipkart Big Saving Days Sale 2022 before making a purchase.

 

Amazon Summer Sale May 2022: Discount offer on iPhone 13 

Apple’s coveted phone model iPhone 13 in the 128 GB storage model will be available during the Amazon Summer Sale May 2022 for Rs 64,900. The MRP of the phone is Rs 79,900. This means that the customers will be able to enjoy a discount of up to Rs 15,000 on the purchase of the iPhone 13.

If you have an old iPhone in working condition then you will also be eligible to receive another additional discount worth up to Rs 17,000 on the iPhone 13.

Buy at Rs. 64,900 (MRP – Rs. 79,900)

Features of Apple iPhone 13 

The iPhone is powered by an A15 Bionic processor with 6 core CPU. Apart from this, it has 16 core neural engines. With the iPhone 13, up to 512 GB of storage will be available. The iPhone 13 has a 6.1-inch Retina XDR display with 1000 nits brightness.

The iPhone 13 has a 12-megapixel dual rear camera setup. This time a new wide-angle camera has been given, whose aperture is f/1.6. With this, there is support for sensor optical stabilisation. Night mode has been made better than before. The second lens is also 12 megapixels ultra-wide and has an aperture of f/2.4.

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