Scan the 'heartbeat' of distant stars, listening for different frequencies to determine their class and solar energy yield (lower frequency noises indicate a higher class star). Energy is necessary to scan, hyperjump, fire and take damage (see below), and will be replenished based on the local star's solar energy yield. Pivot the camera around the ship and scan for high yield stars to hyperjump to, and enemy ships emitting a low frequency humming noise (number of enemy ships displayed on bottom left, if any) . Enemy ships show up as a tiny speck of light in the horizon, which can be scanned for and destroyed when fired upon. Enemies will eventually fire upon your ship, dealing it energy damage and destroying it when energy reaches 0.