Before we start this cosmic journey, let's give a brief introduction to the book's whole plot:

Greetings, reader! Welcome to "The Ejection of Planet X". This book will be about a hypothetical theory about the Solar System having a 5th gas giant. Scientists refer to this unknown gas giant as Planet X,, or just the Fifth Giant. This book will go through the timeline of our Solar System, but only up to the period where this gas giant faced a terrible fate. So sit back, relax, and enjoy reading!

TABLE OF CONTENTS!

The Creation of the Sun

Planets take Place

We Meet Planet X

The Grand Tack
Planet X's Terrible Fate

page 4

page 8

page 15

page 19

page 24

Part 1: The Creation of the Sun.

The Solar System we know today is distinctly different from a Solar System 4.6 years ago. By that era, our Solar System was just a large, stable cloud of gas. This cloud was known as a molecular cloud; or specifically, the "Solar Cloud". This cloud maintained its stability for a long period of time. Eventually, after about 800 million years, the Solar Cloud got gravitationally disrupted by other forces, of which were either rogue runaway stars, nearby molecular clouds, and other unknown forces. The most plausible in this case was a very powerful shockwave from a close supernova.

As the molecular cloud dispersed and transformed, a small spark seemed to appear. This small spark was surprisingly a young, tiny star. This star was our Sun. It was still very very young, so it doesn't have much to work with. The only way it can develop into a star today is to consume nearby gases and debris. Just like a drain, the gases get slurped into the young Sun's gravity. It's not that strong yet, so the Sun only got a few gases to consume.

Part 2: Planets take Place.

A few million years later, the molecular cloud had already been exposed. At that time, the gases were slowly disintegrating. Until, out of nowhere, a small ball of gas started to form. It started moving around the Sun. This small ball of gas was...a planet! The very first planet that formed around the Sun. By that time, it didn't have a name; but you may know this planet as today's Jupiter.

Fun fact: The real reason why the present day Jupiter is so large is because it was mainly composed of the Sun's leftover gases, leaving almost nothing to form - which led to a dense and large planet.

Unexpectedly, another gaseous ball came into view. This one was a lot smaller than the young Jupiter. This new gas ball is today's Saturn. You can see that it doesn't have any rings - that's because they haven't formed yet. Anyways, just like the young Jupiter, the young Saturn gradually created an orbit around the Sun. Right after this, we need to meet two more gas giants before we meet Planet X!

Way further out, we meet two ice giants. These ice giants were just gas giants, but weren't only made of gas - they were made of icy materials, giving them their names. The two ice giants' names are Uranus and Neptune. The young planets formed together in the outer Solar System, which don't have much gas to work with - so the two are even smaller than the young Saturn and Jupiter. Now, we finally get to meet Planet X.

Part 3: We Meet Planet X

Now, we finally get to meet the legend, Planet X! Planet X is a hypothetical planet, meaning it is only thought to be there; but Planet X's theory is still a plausible theory about the early Solar System. A key detail about the dark, cold Planet X are that it is constantly being messed around with. The heavier gas giant, young Saturn and Jupiter, have a gravitational influence on Planet X, shifting its orbit year by year.

A few million years after, the orbit of Planet X started shifting. Instead of a normal circular orbit like the others, it gets tossed around by Saturn and Jupiter. Its orbit became elliptical and super inclined, making it a wrecking ball amongst the Solar System. Not to mention, Planet X was messing up nearby orbits. It often comes across Saturn's, Uranus's and Neptune's orbits, because of Planet X's wonky orbit.

Part 4: The Grand Tack

It took a while for the inner planets to form. There were 7 planets - 3 of which are also theoretical. Their names are: Vulcan, Mercury, Venus, Earth, Theia, Mars and Phaeton. They were just recently formed. Some planets shared orbits, like Theia and Earth. Little did we know, they are in for a surprise. A deathly surprise. With bits and burns flying across the cosmos.

As Jupiter slowly moved to the little planets to migrate, the strong gravity of Jupiter messed up their orbits, bit by bit. First, Jupiter's pulled Phaeton closer to it, and ripped the planet apart due to its strong gravity. Next, as Jupiter approached the young Earth and Theia, it messed up their orbits and caused Earth and Theia to smash into each other. And last, the gravitational pull even affected Vulcan's orbit, causing Vulcan to propel forward, and burn up in the Sun's chromosphere.

It was total madness. 3 of the inner planets were absolutely destroyed by Jupiter. In fact, Earth gained temporary rings just because of the chaos. This is why Jupiter stays in its natural orbit today. It's a safe orbit, where no object gets terminated and ripped apart by its strong gravity. But,  this wasn't the only problem that Jupiter would cause. For that, we have to go back to the outer solar system.