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Constellation or "asterism". The difference is that "constellations" are officially recognized by the International Astronomical Union, while an "asterism" is any other pattern or grouping of stars.
difference between an observaton and explanation
a cluster of stars.
Difference between what? See related question
Identify the difference between primary sector and secondary sector
Think of a sector(section) as your neighborhood and a cluster as a house thats part of that neighborhood.
What is the difference between quota sampling and cluster sampling
it is amazing
The density of the stars.
The difference between public sector and private sector is that when you're in the public sector you work for the government whereas private sector is not. Same applies to accounting.
public sector audit is different from private sector audit
public sector audit is different from private sector audit
No differences
Cluster means group;->
service sector
see zyxo.wordpress.com/2010/07/17/the-difference-between-segmentation-and-clustering/ for a neat explanation.