Hello, Soulraider

What I liked

As always, your article is an informative introduction to the subject providing interesting information.

What might need work

You stated "They are one of the biggest structures in the universe". You might want to clarify what's bigger. You mention clusters later, but not here.

"the smallest called dwarf galaxies contain up to a billion stars" - I believe the smallest galaxies actually contain a few billion stars each, but the phrase "up to" implies they contain less than one billion.

"Galaxies can be further divided into galaxy groups, clusters and superclusters." - this is not a 'division' of galaxies into types, it's a description of the larger structures in which galaxies play a constituant part.

"These contain 50 or less gravitationally bound galaxies" - numbers of a hundred or less should be written out rather than using numerals.

"These contain hundred to thousands of gravitationally bound galaxies." - a hundred to a thousand, or, hundreds or thousands? I'm not clear what you mean here.

"There are more than a 100 billion galaxies in space, each containing up to a billion stars each." - the last clause "each containing up to a billion each" contradicts what you wrote in the opening paragraph, ie. if only the minority of dwarf galaxies contain a billion stars and most galaxies contain more then it's incorrect to state that each galaxy in the universe contains up to (ie. </=) one billion as most contain many more.

Thank you for sharing!

Best wishes,

Bob




My review has been submitted for consideration in "Good Deeds Get CASH!" .