Two nearby explosive massive star deaths, or supernovas, may have triggered mass extinction events in Earth's distant past, ...

The center of the nebula is home to the white dwarf WD 2226-210, the dense core of a medium-mass star, which has been the source of an astronomical mystery for decades. Observations from the ...

while a white dwarf emerges when a star with a low to medium mass exhausts its nuclear fuel and sheds its outer layers.

"We think this is a so-called super-Neptune world orbiting a low-mass star at a distance that would lie between the orbits of Venus and Earth if it were in our solar system," said team leader Sean ...

while a white dwarf emerges when a star with a low to medium mass exhausts its nuclear fuel and sheds its outer layers. Researchers at Monash University and Swinburne University of Technology ...