by The biggest smudge is the Milky Way itself, the billions of stars that make up our spiral galaxy, which we see edge-on.
The smaller smudges don't mean that you need glasses, but that you're seeing tightly packed groups of stars.
One of the best-known of these "clouds" or "clusters"—groups of stars that travel together—is the Pleiades, also known as the Seven Sisters.
Clusters are stellar nurseries where thousands of stars are born from clouds of gas and dust and then disperse across the Milky Way.
Source
The smaller smudges don't mean that you need glasses, but that you're seeing tightly packed groups of stars.
One of the best-known of these "clouds" or "clusters"—groups of stars that travel together—is the Pleiades, also known as the Seven Sisters.
Clusters are stellar nurseries where thousands of stars are born from clouds of gas and dust and then disperse across the Milky Way.
Source
