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Our home planet encounters dust from comets and asteroids. Pixabay

Every year, over 5,000 tonnes of extraterrestrial dust fall to Earth each year, scientists have determined. Our home planet encounters dust from comets and asteroids. These interplanetary dust particles pass through our atmosphere and give rise to shooting stars. Some of them reach the ground in the form of micrometeorites.

Micrometeorites have always fallen on our planet. These interplanetary dust particles from comets or asteroids are particles of a few tenths to hundredths of a millimeter that have passed through the atmosphere and reached the Earth’s surface.


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An international program conducted for nearly 20 years by scientists from the French National Centre for Scientific Research (CNRS), the Universite Paris-Saclay, and the National museum of natural history with the support of the French polar institute, has determined how much of these micrometeorites reach the ground.


These interplanetary dust particles from comets or asteroids are particles. Pixabay

To collect and analyze these micrometeorites, six expeditions led by CNRS researcher Jean Duprat have taken place over the last two decades near the Franco-Italian Concordia station (Dome C), which is located 1,100 kilometers off the coast of Adelie Land, in the heart of Antarctica. Dome C is an ideal collection spot due to the low accumulation rate of snow and the near absence of terrestrial dust.

ALSO READ: Where Did Earth Get Its Carbon From?

These expeditions have collected enough extraterrestrial particles (ranging from 30 to 200 micrometers in size), to measure their annual flux, which corresponds to the mass accreted on Earth per square meter per year. If these results are applied to the whole planet, the total annual flux of micrometeorites represents 5,200 tonnes per year, according to the study which will be available in the journal Earth & Planetary Science Letters from April 15.

This is the main source of extraterrestrial dust on our planet, far ahead of larger objects such as meteorites, for which the flux is less than ten tonnes per year. A comparison of the flux of micrometeorites with theoretical predictions confirms that most micrometeorites probably come from comets (80 percent) and the rest from asteroids. The results could help scientists better understand the role played by interplanetary dust particles in supplying water and carbonaceous molecules on the young Earth. (IANS/SP)


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Union Finance Minister Nirmala Sitharaman on Saturday asked the Directorate of Revenue Intelligence (DRI) to prevent dumping of toxic wastes in India.

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Photo by Brandon Romanchuk on Unsplash

Tech giant Amazon has expanded the sound detection capabilities of Alexa along with more features.

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When Alexa detects that the faucet has been left open, it will send users a notification as well so they can take appropriate action, it added. Amazon previously said at its event in September that it would add the ability to programme Alexa to recognise custom sounds, but that feature has yet to arrive. Having said that, the two new sound detection capabilities not only help users save energy, but they also make it easier to avoid paying for unnecessary charges on your home utilities, the report said.

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Comforting Christmas cocktails help you enjoy the celebrations and get into the festive spirit.

By Olivia Sarkar
It's the holiday season, which means it's time to be merry! As the month of December approaches, we're all in a festive mindset. With Christmas just around the corner, there will be plenty of parties and get-togethers with friends and family.

Comforting Christmas cocktails help you enjoy the celebrations and get into the festive spirit. The Leela Palaces, Hotels, and Resorts offer distinctive cocktails ranging from Hot Toddies to Decadent Egg Nogs. Sit back and enjoy one martini at a time to make the festive season a little brighter.

Dirty Chai Eggnog:

Eggnog is a Christmas favorite that is accustomed to toasts for good health and prosperity. It is an American tradition that has spread around the world. Historically, it has been made using eggs, milk, and alcohol. Our culinary artists have given an Indian twist to this winter drink, making it quintessentially desi!



Recipe:

30 ml Bourbon
30 ml Baileys
90 ml Hot milk tea
Whole Spices
Sweet cream foam to top up

Garnish:
Cinnamon powder and star anise.

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