The Helix Nebula, located 650 light-years from Earth, has baffled scientists for decades. The planetary nebula was created by ...
For over forty years, astronomers have been baffled by X-rays from the white dwarf at the center of the Helix Nebula. A white ...
This colorful image of the Helix nebula may mirror what someday could become of our sun and our home planet. Released on ...