Astronomers Found a 'Dead Star' 1,600 Light-Years Away From Earth Sending out Mysterious Signals Every Two Hours Astronomers ...

For over 40 years, astronomers have been puzzled by strange X-ray signals from the Helix Nebula’s white dwarf. Now, they may ...

Since the 1980s, a strange X-ray emission has puzzled astronomers. At the heart of the Helix Nebula, a dying star may have ...