Bright Sword starts with the grenade flat.

Chapter 417 Discovering the Planet of Stars
Of course, in addition to agreeing to build a conventional optical telescope, Liu Xiu also agreed to build a radio observation telescope to cooperate with the conventional optical telescope for observations, and then use the principle of gravitational lensing to perform inferences and calculations.

There is no way around it, because planets don't emit their own light and can only rely on the reflected light of stars! So if you want to find out whether there are planets in the habitable zone of a star system several or even dozens of light years away, and whether the size of the planet is suitable for human habitation, you can only use gravitational lensing to calculate and speculate.

Gravitational lensing is actually an astronomical phenomenon, which is caused by the bending of light when light passes through a strong gravitational field along the way. According to Einstein's general theory of relativity, the bending of light is because the gravitational field bends space-time, causing light to propagate along a curved trajectory. The gravitational lensing phenomenon allows us to observe more distant celestial bodies behind us, such as galaxies or quasars.

As for the gravitational lens phenomenon, whether in the world before Liu Xiu traveled through time or in the history of this world, it was proposed by Albert Einstein in 1915. His general theory of relativity predicted that gravitational fields can bend light.

In 1942, astronomer Oliver Wolf Lobel confirmed the existence of gravitational lensing through calculations.

However, the phenomenon of gravitational lensing was not observed for the first time until 1979 because it requires extremely precise observation equipment and techniques.

It’s just that the gravitational lens phenomenon is caused by the gravity generated by celestial bodies. Since the masses of celestial bodies vary, the gravity naturally has different strengths, and so does the gravitational lens.

The weak gravitational lens phenomenon refers to the small bending of light when it passes through a relatively weak gravitational field. In this case, the image of the background object will be slightly distorted, but no obvious multiple images will be produced. Weak gravitational lensing is mainly used to study large-scale structures, such as galaxy clusters and the distribution of dark matter.

In contrast to weak gravitational lensing, strong gravitational lensing is caused by light passing through a strong gravitational field. In this case, the image of the background object will be significantly distorted or even form multiple images. Strong gravitational lensing can be used to study high-redshift objects such as distant galaxies and quasars.

However, the observation of gravitational lensing requires the use of advanced observation equipment and techniques to obtain sufficient resolution and sensitivity.

This is why it was proposed in 1915 but not officially confirmed until 1979. After all, the progress of science and technology in just a few decades has been enormous.

Telescopes are the main tool for observing gravitational lensing. Both ground-based and space-based telescopes can be used to observe gravitational lensing.

However, observations from ground-based telescopes are affected by the Earth's atmosphere, so atmospheric correction techniques are needed to reduce this effect. Space telescopes, such as the Hubble Space Telescope, can avoid atmospheric interference and thus improve the quality of observations.

This is also the reason why the observatory wants to build a space observation spacecraft. After all, in addition to refracting light, the tiny dust in the air can also block light.

In addition to optical telescopes, radio wave observations are another way to observe gravitational lensing. Using large radio telescopes, high-resolution radio images can be obtained, thereby observing gravitational lensing.

Of course, because of the magnetic field of the blue planet itself, the observation effect of the radio telescope built in space is much better than that on the ground.

Of course, gravitational lensing is not only important in terms of observation and requires large space telescopes, but also in terms of computational analysis of the observed data.

However, in terms of computing, today's quantum computer 550X can easily handle this kind of computational analysis.

The computational analysis of gravitational lensing data includes modeling, simulation, and statistical methods to extract information about background objects and lensing objects. The modeling and simulation of gravitational lenses are mainly to explain observational data and predict lensing phenomena. This usually requires the use of numerical calculations and computer simulations to solve complex gravitational lensing equations. By comparing the model and observational data, information about the mass distribution and distance of celestial bodies can be obtained.

Of course, in addition to modeling and analysis, statistical methods also play an important role in gravitational lensing research. By statistically analyzing a large amount of gravitational lensing observation data, the laws of macroscopic phenomena such as dark matter and the expansion rate of the universe can be revealed. Common statistical methods include Bayesian inference, maximum likelihood estimation, and Markov chain Monte Carlo method.

It is important to know that the gravitational lens phenomenon is an important means of studying the distribution of dark matter. Dark matter is an unknown form of matter that does not emit light or heat, but has an important impact on the structure and evolution of the universe. By analyzing the gravitational lens phenomenon, we can reveal the distribution characteristics of dark matter in galaxies and galaxy clusters, and provide clues for understanding the nature of dark matter.

You know, now human technology on the Blue Star has developed to the point where we can successfully utilize antimatter, but we still have no idea about dark matter, and we even doubt whether dark matter really exists.

We can only rely on the inference of gravitational lensing to determine whether dark matter and dark energy are real things.

Of course, the astronomical telescope and spacecraft built with huge investment that Liu Xiu ordered did not disappoint Liu Xiu.

In just one short year, the director of the observatory reported to Liu Xiu that he had found a planet suitable for human survival. Although this planet was a solid rocky planet, it had an atmosphere on its surface.

And the most important thing is that the gravity of this planet is similar to that of the Wandering Blue Star, so this means that this planet is very suitable for human habitation and reproduction on the Wandering Blue Star.

Of course, what is more critical is that the straight-line distance deviation between this planet and the Blue Star is not very large. You must know that as the speed of the Blue Star increases, each deceleration or lane change requires a lot of energy to slow down or change its original orbit.

These changes naturally consume the stones on the Wandering Blue Planet. For example, if the Wandering Blue Planet intends to turn around and return to Pandora, the energy it will consume will be even more than the energy it originally accelerated to leave the solar system.

Therefore, if the Wandering Blue Planet's forward trajectory is frequently changed, the rocks on the planet will likely be hollowed out in a short time.

This is also why this planet suitable for human habitation is right in front of the wandering planet's trajectory, which is naturally Liu Xiu's special request.

This planet suitable for human habitation is only twenty-six light-years away from the Wandering Blue Star and thirty-four light-years away from the solar system.

At the current speed of the Wandering Blue Planet, it will only take two years to reach the destination after the curvature engine is activated.

There is no other way, so I asked the Curvature Engine Research Institute to upgrade the curvature engine of Wandering Blue Star! After the upgrade, the curvature effect of the curvature engine is five times higher than before.

Then, the speed of the wandering blue star is also twice as fast as when it left the solar system. Therefore, in terms of overall speed, after entering superluminal curvature navigation, its speed is more than ten times the original superluminal navigation speed.

(End of this chapter)