All things on a planet or a sattelite, that we see straight are actually curved and the things that we see curved are actually straight!
I have corrected it:
All things on any spherical celestial bodies that we see straight are curved and I am not sure about curved things.
Once, there was three marriage invitations with Mullah Nasiruddin and his friend.
The friend had no good shirts and he borrowed a T-Shirt from Mullah Nasiruddin.
On the first invitation, Nasiruddin said to the people, "The T-Shirt my friend is wearing is mine." On the way home, Nasiruddin's friend scolded him for saying those things which Nasiruddin said.
Next day, on the second invitation, Nasiruddin said to the people, "The T-Shirt my friend is wearing is not mine." On the way home, Nasiruddin's friend advised him for not giving any information(neither true nor false).
Next day, on the third invitation, Nasiruddin said to the people, "I will not give any information about the T-Shirt my friend is wearing!"
Does that look like Mars?
It looks like Mars(the red or orange area), but it is Earth. Because grass is here.
The theory of curveness is true because any planet, satellite or star are always spherical in shape.
Things on a planet, satellite or a star that we see straight are actually curved because when we come beyond the planet, we see the thing curved. E.g., the great wall is straight on it upper or the lower surface, beyond it's planet we see that the great wall is curved.
"Things on a planet, satellite or a star that we see curved are actually straight", this theory is right or wrong, I cannot prove it.
Once upon a time, there was a king. The king was rich but he did not want to give anything to the people. In that time, all the people are suffering from famine.
They came to the king's palace and said, "Your majesty, we are suffering from a famine. Please, give us such money."
The king replied, "Sorry! We have a very little money and we cannot give these money to you!"
The visitors escaped from the palace
Now a clever sage came to the court and said, "I will stay here for some months. Today, you have to give me 5 paise, but on the next day, I will take its double."
The king said, "Of course you can take my money!"
A month has gone. The king sent his mathematician to calculate how much money will be spent on the 30th day to pay the sage.
The mathematician came. He was panting. The king said, "Why are you panting?"
The mathematician replied, "The amount of money to spent has gone into about Rs. 5 lakhs(10^5)."
The king said, "The spending of money cannot reach at Rs. 5 lakhs. Are you mad!"
Then the king saw the expenditure log book and he fainted. When he returned into conseiousness, the sage said, "The people are suffering from famine and you are not helping them. You have to help them."
The king replied, "I am giving money to the people." The sage gave all the money that he wanted from the king.
The king summoned all the people who are suffering from famine and gave money to the people.