Merry Christmas🌲🎅🎁

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The lower a satellite’s orbit, the faster it must fly to avoid falling back to the Earth. Most satellites fly in low orbits, 300 km from the earth🛰
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Yet much about the planet's oceans remains a mystery. As of the year 2000, the National Oceanic and Atmospheric Administration (NOAA) estimated that as much as 95 percent of the world's oceans and 99 percent of the ocean floor are unexplored.

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There's a fascinating reason why space appears black.

You might think that there should be no black space at all because stars are everywhere and should fill the sky with light.

This phenomenon is known as Olbers' Paradox, named for the German astronomer Heinrich Wilhelm Olbers who posed it in 1823: if the universe is infinite, static, and timeless, then everywhere you look should eventually hit a star.

It turns out the universe is neither static nor timeless. Edwin Hubble discovered that the universe is expanding, and thermal radiation left over from the Big Bang puts the universe at 13.8 billion years old.

We don't see stars in every direction because some stars haven't been around long enough for their light to reach us.
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What if the earth exploded?!
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A young Kenyan software engineer, Roy Allela invented smart gloves that can convert sign language movements into audio speech for his six-year-old niece who was born deaf.
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A squirrel is the best gardener. Millions of trees grow because squirrels forget where they hid their seeds😁.
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Good News for Space fans!
🚀 Send your name to the Moon! Our VIPER rover will explore the lunar South Pole, studying shadowy craters and searching for frozen water—and you can sign up to add your name before it lifts off:
https://go.nasa.gov/48l9wVv

For those of you who may not be aware, today is Ethiopian Christmas. We would like to extend our warmest wishes and say, "Happy Christmas!" to all our Ethiopian subscribers🥳🎄🎁 Thank you!

--Owner
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If you drilled a tunnel straight through the Earth and jumped in , it would take you exactly 42 minutes and 12 seconds to get to the other side🤯.
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"Without calculus, we wouldn’t have cell phones, computers, or microwave ovens. We wouldn’t have radio. Or television. Or ultrasound for expectant mothers, or GPS for lost travelers. We wouldn’t have split the atom, unraveled the human genome, or put astronauts on the moon. We might not even have the Declaration of Independence."

Weird Universe📚
-Exploring the Most Bizarre Ideas in Cosmology- by David A.J. Seargent
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Did you know?

The longest mathematical proof is 15000 pages long, involves more than 100 mathematicians and took 30 years just to complete it.
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Ancient Babylonians did math in base 60 instead of base 10. That's why we have 60 seconds in a minute and 360 degrees in a circle😁.
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We all know helium as a gas for blowing up balloons and making people talk like chipmunks,

However, what most people don’t know is that it comes in two distinct liquid states
one of which is borderline creepy.

When helium is just a few degrees below its boiling point of –452°F (–269°C), it can suddenly do things that other fluids can’t, like dribble through molecule-thin cracks, climb up and over the sides of a dish, and remain motionless when its container is spun. No longer a mere liquid, the helium has become a superfluid — a liquid that flows without friction.

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Have you ever heard of Aerogel?
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Data from Chandra and NuSTAR provide evidence for the existence of a structure known as a “pulsar wind nebula” at the center of the Supernova 1987A (SN 1987A).

A pulsar wind nebula is a cloud of charged particles and magnetic fields created by a rapidly spinning neutron star. If confirmed, this would be the culmination of a decades-long pursuit to find the dense core left behind when the massive star collapsed and then exploded.

📌This supernova event was discovered on February 24, 1987, making it the first captured in the age of telescopes.

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