There’s a long tradition in speculative fiction of a certain kind of anthology series. These series generally have the following characteristics:

• New/original stories, not reprints.
• Unthemed; stories can be on any topic.
• Three or more volumes.
• Usually fairly high-profile and fairly prestigious.
• The title of each volume is usually the series title followed by the volume number, such as Starlight 3.
• Usually a mix of science fiction and fantasy.
• The title is usually astronomy-related in some way.

The tradition started with the Star anthologies (the first of which was published in 1953); later series in a similar vein included Orbit, Universe, and Starlight.

In 2023, I created a list of series that meet the above criteria, which I published as a spreadsheet. That spreadsheet also includes a sheet listing anthologies that seem like they might fit the criteria, but turn out not to.