Looking around, she thought that she had probably entered the school's cosmic simulation system.

The Universe Simulation System, as the name suggests, simulates a universe.

Lan Qiyu looked at the vast universe in front of her, and she found that her eyesight had become extremely good, so good that it was beyond the highest vision that humans could achieve now, so good that it was like an astronomical telescope, and her field of vision became extremely broad.

One hundred and thirty-eight billion years ago, hydrogen and helium atoms constituted almost all matter in the known universe, and one hundred and thirty-eight billion years later, these two atoms constitute 98 percent of the matter in the known universe.

Of course, including human beings, the real physical matter of human beings is made up of countless atoms.

Lan Qiyu looked at his feet, there was a planet not far from his feet, oh, no! Maybe it's hundreds of thousands of light years away, but in Lan Ruyu's eyes now, it's not far away, because she can clearly observe this planet.

It's a planet, a planet that has been hit by tens of thousands of boulders floating in space, and its craters resemble the surface of the moon.

She looked around and saw planets moving in the distance, bound by the gravitational pull of a massive star.

Lan Ruyu thought about it, and then reached the upper edge of the huge star. The star shines like the sun.

Lan Ruyu knew that when this massive star reached the end of its lifespan, it would begin to expand and grow at an extremely alarming rate, so large that it was unimaginable, and the temperature was high enough to melt the surrounding planets, and the endless energy in the star poured out of the universe into a vacuum.

"Bang-"

The star that had swelled to an extremely large size exploded! The material that is made up of stars begins to scatter around and drift across the universe.

Lan Ruyu thought that the light of the explosion would definitely be able to blind her titanium alloy eyes effortlessly.

In fact, the light of the explosion lasts for a long time, weeks, months, or even years.

When a massive star explodes, it forms a neutron star, and if the mass is large enough, it forms a black hole.

Billions of years from now, the same will be true of the sun, when all the material in the solar system will be affected and destroyed, and the ancient earth will cease to exist.

Of course, she also believes that if there were still human beings at that time, then the people of the ancient earth would have lived on other planets long ago.

Lan looked to the right, an asteroid belt of tiny planets that circled around the star like rings.

Lan Ruyu left the star and began to drift aimlessly in the vacuum.

One of the planets is extremely eye-catching, an aqua blue planet with extremely beautiful blue-purple rings, very similar to the green hat star's neighbor, the purple hat star.

Drifting along the way, Lan Ruyu saw many celestial bodies - comets, natural satellites, meteors, dwarf planets, red dwarf stars......

Looking at the comets with three different trajectories of ellipse, parabola, and hyperbola, and then looking at the planets with double moons, Lan Qiyu was silent.

If she had seen how these celestial bodies moved earlier, she thought, she wouldn't have missed the six points by choosing the wrong option on top of the correct answer in her multiple-choice question in physics.

It's really a tearful story.

The hero doesn't mention the courage of the year, just like Yu doesn't mention the physics multiple-choice questions of the year.

Lan Ruyu saw many stars along the way, some large and some small.

For a star, the more massive it is, the shorter its lifespan, because the atoms in the inner core of a massive star coalesce much faster than a star with a lower mass. 315 Chinese Network

Stars are not inhabitable, at least until 100,000 years of interstellar age. The number of stars in a galaxy can range from millions to hundreds of billions.

And not every star has planets that are habitable for living things, and "habitability" is an extremely demanding condition.

This is also why the interstellar 100,000-year federation has ten major galaxies, and the number of stars in the ten major galaxies adds up to tens of trillions, and the number of planets is naturally more. But out of so many planets, there are currently only a few thousand habitable planets.

Of course, there are many planets in the top ten galaxies that have not been explored and developed by the Federation, and those stars whose lifespans are about to run out will naturally not be within the scope of the Federation's development.

Not only that, but the surrounding stars will not be in this range.

Ten galaxies may have stars exploding and new stars being born every day...

Lan seemed to be fluttering, and a blue nebula appeared in front of him, and there was a reddish-orange halo around it.

It is like a dazzling sunset of burning clouds, but it is completely different from the sunset of burning clouds.

Nebulae, which are made up of huge clouds of ionized gas and dust.

There are three main types of nebulae – perhaps massive stars, the remnants of supernova explosions; Perhaps it is made up of stars that are about to run out of life and cannot become supernovae; Or maybe it's where new stars are born.

When you look at the nebulae in the universe of different colors, you know, there may be new stars or the end of stars.

Nebula is a wonderful thing.

And galaxies, which contain most celestial bodies such as nebulae and planetary stars, also contain infinite wonders.

Galaxies contain all of the celestial matter mentioned above, and more of it is dark matter.

Lan Yiyu stood in the universe, clearly looking at the turquoise galaxy in front of him, this galaxy has four propeller-like cantilever revolving around the galaxy, and the cantilever has bright gas, stars or black holes, and dust on it.

And those colored lights of galaxies are precisely because of the dust.

Not only can dust float in the air but also in a vacuum, countless dust particles gather and float outside galaxies, disturbing the color of galaxies in the eyes of observers.

For example, the current Lan Siyu is admiring the rich and beautiful colors of the galaxy in front of him, but in fact, the colors of the galaxy may not be so rich.

Looking into the distance, those clusters of light with various colors are also galaxies.

Below fifty galaxies form a group of galaxies, above them form a cluster of galaxies, and clusters of galaxies and groups of galaxies form a supercluster.

In the twenty-first century, thirty-five superclusters were discovered, and by the 100,000-year interstellar year, hundreds of superclusters had been discovered.

In this way, you probably understand it clearly.

The number of planets in the universe is impossible to calculate, it is really an astronomical number.

And there are countless cosmic beings in the universe that contain life, and the Federation has only developed outward from the tenth galaxy, which is the former Milky Way, and in 100,000 years, it is only ten neighboring galaxies.

Compared to the universe, the Federation is nothing more than a projectile land. It's more the size of an atom on the ball.

Lan Ruyu passed through galaxy groups, galaxy clusters, and superclusters. Now she is drifting farther into the universe.