How is it possible for the sun to be more luminous than a white dwarf if the sun has lower temperature

A white dwarf may be hot but it is not generating energy, it is losing it.

A white dwarf is the remains of a star after fusion reactions have finished. The core collapse which creates a white dwarf makes it initially very hot. It can be over
100
,
000
K
.
White dwarfs emit radiation while they cool down over a very long time period. They are very small and have very low luminosity.
A star like the Sun on the other hand is constantly producing energy from fusion reactions in the core. Although the surface temperature may only be
6
,
000
K
, the core is at
14
,
000
,
000
K
and constantly producing energy. Hence the Sun is much larger and much more luminous.
Red giant stars are even cooler at less than
4
,
000
K
. They still have fusion reactions taking place in or around the core. They are very large and very much more luminous than the Sun.

Aristotle thought so every portion of the earth tends toward the center until by compression and convergence they form a sphere. travelers going south see southern constellations rise higher above the horizon.~ hope this !