How would the Earth’s orbit change if the Sun’s mass suddenly doubled?

It would immediately turn into an elongated ellipse with an aphelion near the point in space where the Earth was at the moment of the imaginary change in the mass of the Sun.

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.