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The Universe, will it ever be fully understood?

The Universe and life. Four of my short articles.

By A B ForbesPublished 2 months ago Updated 2 months ago 3 min read
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Image credit / Lukáš Vaňátko on Unsplash

1/4

British spelling

Comets are objects in our Solar System that contain dust, rocks, and ice. They orbit the Sun in highly elliptical (oval-shaped) paths.

Comets are lonely space travellers.

As they get closer to the Sun, they warm up and release gases and other debris. This outgassing produces a coma, sometimes called a tail.

In 1986 my two young children and I watched the most famous short-period comet, Halley, as it made its closest approach to the Sun on its long journey through space.

There’s a chance that my children will see it again. In 2023 in an area farther away than planet Neptune it will turn around and start on that long trek back towards the Sun, arriving here in 2061.

Depending on when you were born, some people will see comet Halley twice, I saw it once, but will never see it again.

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What Is Our Planet Doing?

Image credit / Colin Behrens Pixabay

We go about our daily lives, giving little thought to what our world is doing or where it‘s going.

If you were to stand on the equator, the widest part of the Earth, you’d be speeding along at 1,600 kilometres per hour, that speed is due to Earth spinning on its axis once every 24 hours.

Travelling around the Sun on its yearly trip, the Earth is racing along at 107,000 kilometres per hour.

The eight planets, the moons and countless other celestial objects follow the Sun on its epic journey around the centre of our galaxy, the Milky Way. That complete orbit is called a galactic year and takes an estimated 230 million years to complete. Travelling around the galaxy, the Earth is speeding along at roughly 292,000 kilometres per hour.

To top it off, our galaxy with us on board is travelling through space at over 2 million kilometres per hour and we don’t even notice it.

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Our time here on Earth.

Image credit / Bruno, Germany Pixabay.

The Universe is thought to have burst into existence with a gargantuan explosion or expansion roughly 13.8 billion years ago. It was the beginning of space and time.

We, humans, have made up a timescale to suit ourselves. Our day is the time it takes for our planet to complete one turn on its axis. One month is a measure of time corresponding to the Moon's orbit around the Earth, and the time it takes for the Earth to make a complete orbit around the Sun is called a year.

We all talk about "yesterday" in many conversations, but way back in the distant past there must have been a day without a yesterday.

Yes, it is hard for us to comprehend that statement.

How would we manage without our time?

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4/4

The human ingredients.

Image credit / Cody Black Unsplash.

An average-sized adult person consists of approximately 7 octillion or 7,000,000,000,000,000,000,000,000,000 atoms, and all of them are billions of years old.

The most abundant elements in our bodies are hydrogen, oxygen, carbon, and nitrogen. They account for roughly 96% of the atoms that make up you and me.

An element is a pure substance that consists of the same type of atoms.

During our lives, atoms are constantly leaving and joining our bodies. Two of the lightest atoms, hydrogen and helium, came into existence roughly 13.8 billion years ago - not long after the birth of the Universe itself. The heavier atoms came much later, and they were manufactured in stars and supernovae explosions.

Under normal conditions, atoms cannot be destroyed, they just keep on being recycled.

End of the main article.

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Do you find my articles interesting and educational? if you do then please follow the link for more free reads. Regards.

Science
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About the Creator

A B Forbes

I hope you find some of my articles interesting.

Our highly developed brain has given us intelligence and curiosity, now with the help of sophisticated scientific instruments, we can try and make sense of the Universe and our existence.

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  • A B Forbes (Author)2 months ago

    Author. My articles are written for people with an average understanding of the universe and life. We are not all experts. I hope you gain some knowledge if you decide to read them. Regards.

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