First Discovered Pulsating White Dwarf

White dwarfs constitute a significant fraction of how the majority of stars in our universe meet their end after having exhausted the nuclear fuel in their cores. These white dwarfs undergo a cooling process, in which they enter an instability strip where they exhibit pulsations. One noteworthy example is HL_Tau76, the first ever discovered pulsating white dwarf. Classified as a DAV white dwarf, its variability stems from non-radial gravitational wave pulsations. Given its historical significance, it has amassed a great number of observations. In this work, there will be a graph depicting HL_Tau76's pulsation periods. Another graph will show period spacing, which is an indicator of the white dwarf's mass. Studying HL_Tau76 will further our understanding of the broader DAV white dwarf population.