Roger's alchemical rocket's overall design drew inspiration from the Shenzhou Series Rockets he saw in his childhood.
The overall structure was slender, with a similar but not identical build.
At the very bottom was the propulsion system, packed with fusion 'fuel' Roger extracted from seawater near the Aegean Sea. With a Thermonuclear Fusion Spell, it could continuously generate powerful thrust.
Rockets built with technology required consideration of many factors: parameters, component correctness, weather, temperature, wind, propulsion systems, weight, astronauts' physical tolerance, and so on.
But Roger didn't need to consider any of that.
Weather was handled by the Weather Charm.
Weight and space were managed by the Undetectable Extension Charm and Transfiguration.
For propulsion, Roger himself was the true power source.
As for human tolerance, Roger was beyond question. Even Harry, with preparation and magical enhancements, was far superior to Muggles in all aspects.
With so many concerns eliminated, Roger's rocket was much shorter than a Muggle-tech rocket. Directly above the propulsion system was the entire living module. Despite being a rocket, it was as simple as a car – just an engine, wheels, and a shell. The main principle was brute force.
"Let's go, Roger!" Harry exclaimed.
As someone from a Muggle background, Harry understood that space travel was dangerous. He had heard accounts of rocket crashes.
However, he felt no apprehension about the alchemical rocket beneath his feet.
The reason was simple.
Roger was too powerful! With Roger's strength, even without magic, let alone a rocket crash, Harry believed Roger might not even die if hit by two hydrogen bombs, given the display he'd put on at the German Ministry of Magic.
And that was just taking a direct hit.
If anything truly went wrong, there would be no need to endure it. Roger could simply use magic to transport them away.
Harry had seen Roger practice the Apparition Spell.
With spatial teleportation, they could escape in plenty of time.
...
In truth, Roger had made design mistakes with this rocket.
"Tsk, I shouldn't have added this spell for comfort," Roger sighed softly.
Sitting inside the rocket's living module, Roger looked through the window as they passed through the clouds, but he felt no sensation.
To account for potential weightlessness in space, Roger had implemented a Gravity Solidification Magic. However, during liftoff, Roger's experience was worse than riding a bus; it felt like watching a video on a computer or phone.
He felt none of the backward push or gravitational acceleration.
Now that the rocket was accelerating, it was inconvenient for Roger to cast spells to suddenly change anything.
...The effort to build this rocket aside, the cost of various alchemical materials was truly exorbitant. Roger didn't want to blow it up unless absolutely necessary.
He would disable this mood-killing spell once they reached space.
While Roger was slightly displeased, Harry was excitedly staring out the window the entire time.
"The Earth is getting smaller." Harry had traveled for over a month, witnessing many wonders through Time Phantom Shuttle, but this was his first time seeing the world from high above.
It was different from flying in a plane.
Planes typically flew at altitudes of 6,000 to just over 10,000 meters.
Troposphere, stratosphere, mesosphere... and the final boundary of the magnetic field.
10 km and 1000 km felt entirely different.
Upon reaching an altitude rarely attained in all of human history, not only Harry, but even Roger's eyes, showed a rare glint of emotion.
That pure, blue planet, their 'mother planet' Earth, was reflected in their pupils in a completely new way.
They remained silent for a long time.
After a while, Roger shifted his gaze to the side.
He had something else he wanted to observe.
Drawing his wand, Roger transformed a round button into a square, carefully experiencing the change.
...Overall, the feeling of casting the spell was slightly different from on the ground, but the difference was negligible. If not for his Second Brain, which allowed for perfect recall, he might not have even noticed the subtle variation.
Through this, Roger confirmed two doubts he had held.
One was whether magic could be used outside of Earth; the answer was yes.
The other was... the collective consciousness of Earth's inhabitants did indeed enhance a wizard's spellcasting!
Upon moving far enough away from sentient beings, the 'signal' seemed to fluctuate slightly, and this enhancement weakened a bit.
However, it was not a major issue.
As long as it wasn't a question of 'existence or non-existence,' it was manageable.
Roger had read some science fiction books in his past life that proposed that once detached from Earth's environment, physics would undergo baffling changes. For instance, in a space environment, metals could experience 'cold welding,' a phenomenon that wouldn't normally occur on Earth.
So, someone decided to have Earth act as a 'physical rule stabilizer' and travel through the universe together.
At worst, when they develop their own universe, they can just take hundreds of millions of people with them.
With the Undetectable Extension Charm and virtual reality technology, Roger didn't think it would be too difficult to achieve.
Recalling his scattered thoughts and confirming that he could cast spells even outside Earth's atmosphere, he began his real business.
"Apparition!" With a ripple of space, Roger made direct contact with the universe with his own body.
Then, he fulfilled another childhood wish.
"So, this is the real color of the sun, without the filtering and refraction of the atmosphere or any other matter."
Seeing the sun in space, check! Oh, almost forgot, there was a second wish.
Speaking in space, to see if sound truly couldn't travel.
This was also completed.
After doing these two things, Roger leisurely looked around in space.
High temperatures, radiation, and other things didn't cause Roger any discomfort.
After all, only his appearance was still human; his body's interior was already made of some inexplicable things.
Ordinary things couldn't affect him.
"...It's so good. If history had followed its original course, this place would have become a junkyard in a few decades." Roger looked down at the azure blue with a hint of regret.
As humanity's aerospace technology advanced, rockets would no longer be exclusive to major powers; private companies, and even individuals, would begin to have the capability to launch their own satellites.
In Roger's era, according to data, there were nearly 170 million pieces of space debris floating near Earth!
All of them were remnants of various satellites, aircraft, and rockets.
This situation was not static; it was becoming increasingly severe.
According to one theory, if the amount of space debris became too large, it could even severely impact humanity's space exploration.
But before that day truly arrived, would humanity's nations spend money and great effort to address this problem?
Just like before the disastrous incident in London, many people were indifferent to environmental pollution.
Only when it hurt did they realize their mistake...
"But since I'm here, the course of history probably won't turn out that way."
It was now 1992, and Roger's Three-Dimensional Law would become widespread in the coming years. By the 21st century, who knew what the world would look like.
His thoughts turned here, and Roger, who had intended to return to the Dream Weaver, suddenly had a flash of inspiration.
"Wait, space debris... If I used some magical means, it seems I could create a rather dangerous weapon right now!"
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