In 1917, Heber Curtis had observed the nova S Andromedae within the Great Andromeda Nebula (Messier object 31).
Today, in addition to comet and asteroid spotting, amateurs continue to do valuable work observing the brightnesses of variable stars and detecting novae ("new" stars) in the Milky Way and supernovae in other galaxies.
The conditions in that fusion reaction could produce lithium, and today astronomers observing Nova Centauri 2013 (pictured)—the brightest nova this century and easily visible to the naked eye report seeing a clear signature of lithium being flung out from the star at 2 million kilometers per hour.
In 2010 Fermi observed the first gamma-ray emission from a nova.
Scanning electron microscopy was used to observe the surface morphology of the samples using a NOVA NanoSEM 230 (FEI, Hillsboro, OR) scanning electron microscope.
To observe the effect of BCC on skin hydration level, a NOVA meter was used to compare water content of the stratum corneum before and after BCC consumption.
Atomic force microscopy (AFM) (Dimension Icon, Bruker, Karlsruhe, Germany) and scanning electron microscopy (SEM) (Nova NanoSEM 320, FEI Co., Hillsboro, OR, USA) were used to observe the thickness and morphology of the h-BN nanosheets.
A backscattered electron scanning electron microscope (BE-SEM) (Nova NanoSEM 230, FEI, Hillsboro, OR, USA) was used to ex situ observe the elemental distribution of the samples on a large scale.
In 1917, American astronomer Heber Curtis observed a nova within M31.
In 1917, Heber Curtis observed nova S Andromedae within the "Great Andromeda Nebula" (as the Andromeda Galaxy, Messier object M31, was then known).
