Looking for a Time/Life three-volume set from the 1970s

This was a set of books (hardback, 8 1/2 x 11 inches I think, fairly thin) about science that one of my cousins had. The whole set of three was intended to cover all of science - and volume three was “the cosmos” as a whole. I remember in particular, the cover of the third book, which showed a tinker-toy model, intended to illustrate the expanding universe. Googling is doing me no good - any ideas?

It looks like it’s 20 books, The Cosmos is number 13.

And the thing that resembles a Tinker-Toy model is on book 7: Life Search.

I don’t think Time Life did anything in a mere 3 volumes.

Eta I’m kinda surprised the full set weighs just 0.01 ounce.

These appear to be from the 1990s - and the cover’s not quite what I’m remembering

I think I’ve found it. This link talks about “The Universe” by David Bergamini, as part of a set with The Earth by Arthur Beiser and Evolution by Ruth Moore. The cover isn’t quite what I was describing, but it’s possible I’m thinking of interior art. I’ll try to get the Bergamini book

Did you try going through all 75 pages of https://www.amazon.com/Books-Time-Life/s?rh=n%3A283155%2Cp_27%3ATime-Life+Books ?

No. I tried “1970s” “Time/Life” and variations on “space” (but not Cosmos - that way leads only to Sagan).

I now have the Bergamini book requested on Interlibrary loan

The Time Life series on Photography was spectacular, and probably taught me most of what I know about the subject.

I got the book through interlibrary loan, and it’s definitely something I read as a kid. Doesn’t have the illustration I describe above, but that could be a) because I read a different edition or b) I’m conflating two books or c) I’m totally imagining the illustration I’m thinking of.

Or d), you’ve gone down the wrong trouser leg.