is the galaxy that was mentioned earlier visible from earth?
Yes, it  is visible from Earth as a hazy band of white light, some 30° wide, arching across the night sky
Milky Way
The Milky Way is visible from Earth as a hazy band of white light, some 30° wide, arching across the night sky. In night sky observing, although all the individual naked-eye stars in the entire sky are part of the Milky Way Galaxy, the term "Milky Way" is limited to this band of light. 
how many stars r in the milky way It is estimated to contain 100–400 billion stars how can its size be described? It is the second-largest galaxy in the Local Group, it is approximately 890 billion times the mass of the Sun. To compare the relative physical scale of the Milky Way, if the Solar System out to Neptune were the size of a US quarter, the Milky Way would be approximately the size of the contiguous United States. which celestial bodies can be found in this galaxy? It  contain ten billion white dwarfs, a billion neutron stars, and a hundred million stellar black holes. what is the first celestial body? It is also called a degenerate dwarf, is a stellar core remnant composed mostly of electron-degenerate matter. what makes it habitable? It has been proposed that  dwarfs the surface temperatures of less than 10,000 Kelvins could harbor a habitable zone at a distance of c. 0.005 to 0.02 AU that would last upwards of 3 billion years when was it discovered? First recognized in 1910, and the name coined in 1922. who discovered it? UNANSWERABLE
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Milky Way [SEP] Appearance
The Milky Way is visible from Earth as a hazy band of white light, some 30° wide, arching across the night sky. In night sky observing, although all the individual naked-eye stars in the entire sky are part of the Milky Way Galaxy, the term "Milky Way" is limited to this band of light. The light originates from the accumulation of unresolved stars and other material located in the direction of the galactic plane. Brighter regions around the band appear as soft visual patches known as star clouds. The most conspicuous of these is the Large Sagittarius Star Cloud, a portion of the central bulge of the galaxy.