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what do cosmic rays + gravitational law have in common? Let's explore

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Long ago, people once accepted this model/theory of the universe and its formation.. Why?  What might their perspective have been?

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What flaws existed in this geocentric model?  

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What flaws existed in this geocentric model?  

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p.3 in Connexus!

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year 1543 Copernicus proposed heliocentric model

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year 1543 Copernicus proposed heliocentric model

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The planets and the other objects in our solar system revolve around the Sun.  What evidence supports this model of the universe?

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Early 17th century Kepler explained planetary motion being elliptical -  Newton 1687 published Law of gravitation - proven mathematically

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Early 17th century Kepler explained planetary motion being elliptical -  Newton 1687 published Law of gravitation - proven mathematically

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basic outline of the history of models of the universe Investigated and proved his theory of gravity's existance on earth and now knowing that the heliocentric model was the correct one, showed by his own universal gravitaioal law that the sun being the centre of the universe could be proved using mathematics

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HIstorical Development of Models of the universe from Aristotle to Newton timeline.

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basic outline of the history of models of the universe Investigated and proved his theory of gravity's existance on earth and now knowing that the heliocentric model was the correct one, showed by his own universal gravitaioal law that the sun being the centre of the universe could be proved using mathematics

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Hubble discovered many galaxies and they were moving away from each other -1923

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Hubble discovered many galaxies and they were moving away from each other -1923

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Earth's solar system formed 4.5 billion years ago.  What evidence supports this theory?  (the expanding universe)

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The Big Bang Theory of the Universe - 1927

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The Big Bang Theory of the Universe - 1927

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What's This Big Bang All About?

In 1927, an astronomer named Georges Lemaître had a big idea. He said that a very long time ago, the universe started as just a single point. He said the universe stretched and expanded to get as big as it is now, and that it could keep on stretching.

What an Idea!

The universe is a very big place, and it's been around for a very long time. Thinking about how it all started is hard to imagine.

Some More Information

Just two years later, an astronomer named Edwin Hubble noticed that other galaxies were moving away from us. And that's not all. The farthest galaxies were moving faster than the ones close to us.

This meant that the universe was still expanding, just like Lemaître thought. If things were moving apart, it meant that long ago, everything had been close together.

Everything we can see in our universe today-stars, planets, comets, asteroids-they weren't there at the beginning. Where did they come from?

A Tiny, Hot Beginning

When the universe began, it was just hot, tiny particles mixed with light and energy. It was nothing like what we see now. As everything expanded and took up more space, it cooled down.

The tiny particles grouped together. They formed atoms. Then those atoms grouped together. Over lots of time, atoms came together to form stars and galaxies.

The first stars created bigger atoms and groups of atoms. That led to more stars being born. At the same time, galaxies were crashing and grouping together. As new stars were being born and dying, then things like asteroids, comets, planets, and black holes formed!

A Super Long Time

How long did all of this take? Well, we now know that the universe is 13,800,000,000 years old-that's 13.8 billion. That is a very long time.

What's in a Name?

That's pretty much how the universe began. Because it got so big and led to such great things, some people call it the " Big Bang." But maybe a better name would be the " Everywhere Stretch." What do you think?