As such, they are a class of extra-powerful novae.
These stars have spectra very similar to novae that have returned to quiescence after outbursts, yet they have not been observed to have erupted themselves.
They compiled and examined the records as part of their research on recent novae, comets, and later, the supernovae.
In nature, these reactions would take place in stars and exploding stellar environments such as novae and supernovae.
Comets and novae have been observed and discussed for several thousand years.
Searching the photographic record, 11 more novae were discovered.
During most of her career, she also did research on novae and related eruptive stars.
Other names, mainly for variable stars (including novae and supernovae), are being added all the time.
