In quilting sometimes blocks have more than 1 name and sometimes more than 1 block has the same name. I was able to find 5 different Double Star quilt blocks. There are likely more out there that are a little harder to find.
Double Star #3
Double Star #4
As you can see, the methods and needed skills to make these blocks are varied, from the basic flying geese units to templates to paper piecing with a Y seam thrown in just for fun.