Born here but not here.

The sun is pouring into the city, and everything grows, why?

Without the embrace of the earth, we would have disappeared into the vast universe.

Without atomic stability, we would not exist.

No one asks why the heavens and the earth are changing, and the stars are changing?

Where did the universe originate?

Does it have no beginning and no end?

If we are willing to turn back time, will there be limits to our cognition?

What is the smallest thing in the world?

The river is rolling, but only the past remains, and the future is not known.

The vast universe, why do we meet here?

A Brief History of Time: Preface

In that vast and magnificent universe, countless stars rotate according to the rules of nature, and the mystery and beauty of them are fascinating, and we live in an insignificant galaxy within the Milky Way, enjoying the rain and dew produced by the right amount of solar radiation and atmospheric movement. Despite the vastness of the universe, the miracle of life was born here.

The swirling hot gas gradually contracted, the center of the nebula formed the primordial sun, and the remnants of the nebula disk gave rise to the first planet, and on this third planet, 3.6 billion years ago, the common ancestor of all life on the planet appeared, which is LUCA.

1.9 billion years later, a species of archaea fused with LUCA to create something new: mitochondria.

540 million years ago, a variety of invertebrate complex organisms exploded.

Another 100 million years later, a supernova 6,000 light-years away exploded, completely destroying the planet's ozone layer, and the sun's high-energy radiation passed through the atmosphere, killing countless surface creatures, known as the Ordovician and Silurian extinctions.

However, this is only the first global catastrophe for life on this planet, and only marine life has survived.

But just 30 million years later, algae blooms caused a severe lack of oxygen to the seafloor, massive global eruptions of submarine volcanoes, and the second Devonian mass extinction led to the disappearance of 82% of marine species.

The next time, at the end of the Permian period, 250 million years ago, the planet's third catastrophe struck, extinct 96% of all species.

For the fourth time, the Triassic mass extinction once again led to the extinction of 76% of the planet's life.

Fifth, 65 million years ago, during the Cretaceous mass extinction, about 75% of the planet's species disappeared without a trace, providing an opportunity for the emergence of mammals.

On this planet, life has gone from nothing to today's diversification, after billions of years, in this 4.6 billion years of condensed day, the first 6 hours were dead silence, at 6 o'clock in the morning, the first algae were born, but the original algae, but on this day, they lived until 20 o'clock in the evening to see the next generation of mollusks appear.

At 11:30 p.m., half an hour before the end of the day, the dinosaurs evolved and disappeared only 10 minutes later. In the last 20 minutes, mammals appear. With 10 minutes to go before the final countdown, the ancestors of the primates took the stage, and in the last 2 minutes, their brains tripled and became humans.

The history of mankind seems long, but it is not worth mentioning compared to the history of the entire planet, and it is as inconspicuous as a drop in the ocean.

Pluto, a planet that even light has to traverse 5.5 hours to reach, takes 247 years to orbit the sun, at the beginning of the last cycle, it was 247 years ago in 1771 AD, the British scientist Priestley did a famous experiment, he found that green plants can renew the air, and later, the experiment proved that this is the result of plant photosynthesis to release oxygen, chloroplasts in green plants can use light to convert carbon dioxide and water into nutrients, and release oxygen.

Forty-three years later, Stephenson developed the first steam locomotive.

Sixty-four years later, physicist Michelson devised an experiment to calculate the speed of light propagation, and he confirmed that the speed of light is a finite measurable quantity.

Eight years later, in 1886, Carl Benz invented the three-wheeled car.

Seventeen years after the birth of the three-wheeled car, in 1903, humans took to the skies, and the Wright brothers' first airplane was successfully tested.

It took only 58 years for humans to wear a 90-kilogram spacesuit into space after the successful test flight of a simple wooden airplane.

In 2015, the human-built New Horizons probe flew past Pluto.

Before the end of the sun's orbital cycle, Pluto was shocked to discover that humanity had gone from having not yet figured out the composition of the air and had to travel by horses, to having invented computers, built flying machines, and even reached its own side.

Pluto could not have predicted how far human civilization would reach at the end of its next solar orbital cycle, 247 years later, in 2265?

If it hadn't been for destruction, the sea of stars might have really arrived, right?

However, the story I want to write does not take place in 2265, 247 years later, it will be a time not far from the present, a story that takes place in deep space.

The Mars Direct Attack Program, jointly designed by China and the United States, is a plan aimed at orbiting Mars, manned landing, long-term stay, building preliminary bases, and conducting various scientific experiments. And the project is going very smoothly, when the protagonist takes the "Deep Space 17" spacecraft to Mars, the original intention of the plan is not only to enter the Martian orbit to bring back the astronauts who stayed last time, but also various scientific experiments, including artificial gravity spiral arm test, hibernation module deep space experiment, space plant experiment, nuclear engine and ion thruster test, etc.; ...

This book comes from a physical book commissioned by an editor.,Old Fish is written with the concept of a physical book.,So I'll send out the first draft part for everyone to see.,Try to send it out this week.,If you're interested in thriller sci-fi and deep space journey.,You can pay attention to my public \\ public\\\ number: Lost Fish.。 Of course it's not the Eunuch Matrix, I'll continue to write about this book. In addition, I made a playlist in Netease Cloud Music, searched for the playlist "Staring into Deep Sky", and listened to it with interest.