6.67×10^-11N·m^2/kg^2 This is basically the same as the universe in the previous life. It seems that except for the special energy of magic, the basic parameters of the two universes are roughly the same.

However, the N representing the symbol of gravity may need to be replaced by L representing itself. Another important data, gravitational acceleration, has long been calculated by Lin En, which is about 10m/s^2, slightly higher than the Earth's value of 9.8.

With these two values, it becomes extremely easy to calculate the weight of the planet under your feet. You only need to use the golden substitution formula GM=gR^2 derived from the formula of universal gravitation.

That is, the gravitational acceleration multiplied by the square of the radius and then divided by the gravitational constant.

After Lin En roughly explained the derivation process of the formula, Harov and others immediately took out paper and pen to start calculating.

The square of the huge planet value, divided by the extremely small gravitational constant, is a very tedious calculation...

"I can't figure it out, I can't figure it out... It's too difficult!" Rawl felt dizzy as he looked at the numbers piled up on a whole page of parchment.

Raphael beside him was grabbing his few hairs desperately, with beads of sweat already appearing on his forehead, just to calculate the final result.

Even though there are thousands of obstacles, few people choose to give up. After all, the final mystery of the planet is right in front of them. They have arrived at the door of truth and only need to kick it open with the final push.

The only problem is that this door is too hard, and it's easy to break your bones if you kick it...

After a full hour and a half, a wizard stood up excitedly, almost mad, and shouted loudly, "I calculated it, it's 67 trillion tons!"

After saying this, he stared straight at Lin En, hoping to get his affirmation.

However, Lin En just shook his head. Harov, who had just calculated the data, was much more straightforward and rejected it directly. "Wrong, very wrong!"

"Wrong, how could it be wrong?" The excitement on the wizard's face froze immediately. He grabbed several pieces of parchment in front of him and reviewed them carefully several times before he realized that he had made a mistake in writing the value of the planet's radius. The unit he used was kilometers.

That means he needs to add N zeros and recalculate... His one and a half hours of calculations were all in vain! Realizing this, the wizard trembled, spat out a mouthful of blood, and fainted on the spot.

Alok looked at him with pity, then stopped writing. Even for formal wizards, calculations were so difficult, so it would be better for apprentices like them to just wait for the answer.

Although calculations on huge numbers are difficult, as time goes by, more and more people have figured out the results. It is a number that cannot be accurately described by any existing units, and it can only be presented intuitively by using Olympiad mathematics formulas.

7.08×10^24kg!

"No wonder, in the [Arcane Society], Olympiad mathematics is the foundation of everything..." Harov finally understood.

Values ​​like gravity and stars, which are either extremely huge or as small as dust, can only be clearly calculated through Olympiad mathematics derivation.

Thinking of this, Harof directly announced the result. After getting Lin's confirmation, he secretly breathed a sigh of relief. With such a huge number, even after repeated confirmation, he couldn't help but worry that there would be errors.

Isn't this a bit of a difference? It seems that the so-called magic star is just so-so. Compared with Lin En's universal gravitational substitution formula that directly points to the essence of weight, the method of dividing and calculating the weight of the soil is not worth mentioning at all...

Facing the mocking gazes of Krol and others, August remained calm. The 20% deviation he mentioned actually refers to the number of zeros...

…

The discussion about the gravitational constant and the weight of planets continued until the evening. Some fanatical wizards of the prophecy school even estimated the mass of other planets in the star system based on the law of universal gravitation, intending to reconstruct a picture of the movement of stars.

The witches in the venue were more interested in the round mirror that Lin En took out during the experiment. After learning that this smooth and flawless glass mirror could be mass-produced and sold for only twenty magic gold coins, they were overjoyed.

It was not until the end of the seminar that Lynn was finally free from the situation of being hounded and questioned.

In order to make these wizards understand certain terms, he really racked his brains. After all, there were so many things to explain.

The culture, vocabulary, scientific level, and even the brain circuits of the two worlds are different. For example, to use the universal gravitational formula to calculate the weight of a planet, you have to first tell these wizards that weight is the intrinsic mass multiplied by acceleration, and then you have to explain what mass is...

Fortunately, the effect of all this effort was far beyond his expectations. The Secret Society, Mathematical Olympiad and Iyeta School became famous in the land of wizards, so much so that some lone wizards began to test his attitude and asked if they could join the Iyeta School.

"Your nomination for the Order of the Corona has been approved by parliament, and the awarding ceremony will be held in two days. You'd better take some time to prepare." Harov said with a smile.

“Are there any rules or things we need to pay attention to?” Lin En asked. He thought he just had to go up and receive the award.

"That's not the case, but this is the first time that the highest award in magic science has been awarded to an official wizard, so you should say a few more words to convince others." Harov said jokingly, then he straightened his face and continued, "I think your theory of gravity still has some omissions."

Lynn's expression also became serious, but he soon heard Harov speak solemnly.

"It's not just mass that can affect time and space, it's also magic!"

Lin En was suddenly at a loss whether to laugh or cry. He thought the other party was going to say something new.

Of course he knew this, after all, matter is energy and energy is matter!

But now is not the time to come up with the mass-energy equation.

As for the law of universal gravitation, even without me, Harov would be able to deduce it in a few years. All he lacked was an inspiration...

(PS: I have indeed written a lot about scientific research in the past few days. I originally just wanted to write about the derivation of gravity, but there are too many things to explain and too many preliminary experiments. I have exhausted myself from calculating the data one by one... Fortunately, I have finished it. Please forgive me.) (End of this chapter)