Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
(top) Constellations per use are shown in the foreground, over the background of all other constellations. (bottom) The similarity graph between practical uses. The node size is proportional to the number of constellations per use, and the edge width to the similarity Δ.
