The star has the same temperature as the Sun, but its diameter is 2 times smaller. At what distance from this star must a planet

The star has the same temperature as the Sun, but its diameter is 2 times smaller. At what distance from this star must a planet be to receive from it as much energy as the Earth receives from the Sun?

Radiation comes from the surface of the star, the area of which is proportional to the square of the radius.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.