Physicists believe that the universe started as a very simple, extremely compact ball of energy. (discovermagazine.com)
Take small spoonfuls of the mixture, and roll into compact balls (N.b. if the mixture is crumbly, add a dash of water). (coconutandberries.com)
An extremely compact ball of neutrons created from the central core of a star that collapsed under gravity during a supernova explosion. (webbtelescope.org)