The answers include the following:
- NGC 1427A is referred to an irregular galaxy while U is referred to a spiral galaxy and is therefore the way in which they are different.
- They are however similar because they both contain plenty of dust and gas.
What is a Galaxy?
This is derived from the Greek word 'galaxias' and has a total of over 100 billion stars present. This comprises of substances such as stars and other elements such as dust, gas, dark matter etc which are held together by gravity.
NGC 1427A is a good example of an irregular galaxy while U is a spiral galaxy because it can be viewed from the top to bottom. Their similarities however is that they both contain the same constituents such as dust and gas thereby making it the most appropriate choice.
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