The star constellation I think you are talking about is Orion's Belt.
3 Stars in a straight line
The three stars in a line are known as Orion's Belt. They are named Alnitak, Alnilam, and Mintaka. These stars are part of the larger constellation Orion.
ecliptic
triplet
In a broad line on the left called the Main Sequence.
* / *: :* : * < ::::::::::: *:::::::::> : * : : / the stars are the line, it crosses the y-axis at 3 and the slope is negative 2
Get 3 stars and Rosalyn or whatever she is called will give you one.
"...The night is starry and the stars are blue and shiver in the distance," (line 3). "The night wind revolves in the sky and sings," (line 4).
In a row means one after another on the same line. So "stars in a row" mean there are stars one after another all on the same line.
The Milky Way is a huge group of stars, somewhere between 200 and 400 billion stars. The stars themselves, or the Milky Way in its entirety, is not in line with anything.
The old sailors went hugging the coast line. Using the stars to navigate is called celestial navigation.
The easiest way to identify Orion (the Hunter) is the 3 bright stars in line forming Orion's belt.