If Andromeda Galaxy were brighter, this is what we’d see

Andromeda Galaxy is the farthest object in the sky that we can see with the naked eye. But if you don’t know where to look, you won’t notice it. If it was much brighter, its appearance in the sky would be sensational. The moon is a good reference for what we’d see if our galaxy’s neighbor was much brighter in the image below:

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The Size Of Earth Compared to Other Planets and Stars (and the Universe)

Have you ever wondered how big is the Earth compared to other planets? Or other stars? Or even the Universe itself?

When it comes to big numbers, very big numbers, the human brain is weak. In fact, our brains cannot deal with really large numbers. That’s why when the subject is Earth, planets, Solar System, galaxies, and in general, the Universe, we cannot truly conceptualize the things. A lot of people think we’re “conquering” space (we are far, far away from that – and maybe we never will), or the “aliens” are regularly visiting Earth as if it is just an hour’s drive from there.

In fact, these people don’t truly understand what are they talking about, how big is the universe, how far even the nearest stars are, and how the Earth is a tiny, tiny spot in a vast space we are still striving to understand.

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If 100 People Lived on Earth Today

If the population of the world was only 100 people, instead of 8+ billion, while the statistics remain the same, what would today’s society look like? A video published by GOOD Magazine (produced and written by Gabriel Reilich, animation by Jake Infusino) answers that question.

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Human Population Through Time [Video]

The Earth is getting more crowded every single day. As of 2023, the world population was estimated at 8 billion. Our planet is already overpopulated, and despite the growth of the population slowing down, the situation will be worse: the United Nations estimates it will further increase to 11.2 billion in the year 2100.

Here is a video published by the American Museum of Natural History showing the World’s population through time.

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Eratosthenes calculated the Earth’s circumference more than 2,200 years ago [Here’s how]

In an era long before satellites and advanced technology, an ancient Greek mathematician named Eratosthenes accomplished an extraordinary feat – he calculated the Earth’s circumference with remarkable accuracy, even without leaving Egypt. Armed only with a stick, the angle of a shadow, and the distance between two cities, Eratosthenes was able to deduce that our planet was a sphere and estimate its size. This achievement in 240 BC, more than 2,200 years ago was not only a testament to human ingenuity but also set the groundwork for future geographical and astronomical studies. His approach was brilliantly simple, yet so effective that it came incredibly close to the measurements we use today, over two millennia later.

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How Earth Moves [Video]

A beautiful video, once again, from Michael Stevens, titled “How Earth Moves”. Michael explains many concepts, including “sub-solar point”, “sidereal day vs solar day”, or “how Earth moves in space” etc, and he is doing it in a very simplified manner. Enjoy!

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8 famous places to see before they have vanished

There are a lot of natural and human-made wonders in the world. But everything has an end, and sooner or later, they’ll be gone. Unfortunately, some of them will be vanished sooner, even in a few decades. Here are eight famous places to see before they have vanished, just in case you may want to see them before they are gone.

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The 6th Major Extinction Event

In the past, there were five major extinction events (a widespread and rapid decrease in the biodiversity on Earth), and a lot of minor ones. Now, we are in the middle of the sixth one, called the “Holocene extinction event”. And the cause is… guess what? Humans.

According to the WWF’s (World Wildlife Fund) new Living Planet Report (2016), now we are in the middle of the biggest mass extinction on Earth, since the dinosaurs, which was around 65 million years ago. And the world is set to lose two-thirds of its wildlife by as close as 2020.

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