our earth and white dwarf ,

 White dwarf : white dwarf is one of the stage of  stars like sun, who are too small to become a black hole or neutron star 

It was told that our sun will  turns into a white dwarf  in 75,000  years .

If our sun turns into a white dwarf , 

1) our earth will be forced to accept low brightness, which would badly affect photosynthesis. The luminosity of sun is so low because of it's smaller size. 

2) ⋆Even though the luminosity of white dwarf  is very low, it naturally hotter than sun (white dwarf's temperature is nearly 100,000 kelvin ; sun's temperature is nearly 5,772 kelvin ),

⋆ These small stars retain this massive heat from residual energy of sun(no fusion take place on white dwarf),

⋆ and our earth will be very close to the star on that time due to star's high density( even though the white dwarf is small it's denser than main sequence). 

⋆which leads our earth will be forced to accept higher heat than ever before .

But before this small star destroy us, pollution in our earth will destroy humans and his surroundings.😔😔😔