These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 0.99 s (backtrack: 0/20).

[ebuild  N     ] sci-astronomy/erfa-2.0.0:0/1::gentoo  713 KiB
[ebuild  N     ] sci-astronomy/pal-0.9.8-r1::gentoo  USE="-static-libs" 1239 KiB

Total: 2 packages (2 new), Size of downloads: 1951 KiB