Secondary asteroids
From Astrolords
Secondary asteroids are those that players can capture to mine for crystals.
Once players acquire the science of Domain, they can capture up to 5 secondary asteroids.
To do that, players need to find an empty asteroid (or the asteroid that belongs to other Astro Lord) on their radars and then send out an attack to capture it.
In order to capture the other Lord’s asteroid, players need to destroy the defending Star-Base.
Other players can not see the Astro Lord's secondary asteroid unless he/she builds a Star-Base there.
Once players build a StarBase, they can teleport their resources.
If players do not extend the lifetime of their secondary asteroid, it disappears.