Change to Andromeda 

I changed Andromeda Galaxy to Andromeada "nebulae" for two reasons:

Before it was discoverd to be a galaxy it was thought to be a nebulae
Ed Hubble discoved that it was a galaxy.  By saying that "he claimed to discover Andromeda galaxy first" is like saying that "he claimed that he discovred to discover that it was a galaxy before Hubble".  How could he argue his discover with Hubble when they live 300 years apart?