The Ring Nebula (M57) in Lyra is one of the most adored ... Now this telescope shows only faint fine clouds and the small star is no longer visible.” It’s unfortunate that, to my knowledge ...

"When a single star evolves into a planetary nebula, there is no process that we know of that has that kind of time period," Wesson said. "Instead, these rings suggest that there must be a ...

“When a single star evolves into a planetary nebula, there is no process that we know of that has that kind of time period,” Wesson wrote. “Instead, these rings suggest that there must be a ...

When a single star evolves into a planetary nebula, there is no process that we know of that has that kind of time period. Instead, these rings suggest that there must be a companion star in the ...

The Ring Nebula (M57) was first discovered in the winter of 1779. But by whom? Some claim it was French astronomer Antoine Darquier de Pellepoix, while others insist it was Charles Messier.