Antimatter is a very useful substance in the game. It is used to power the hyperdrive travels via the warp cell.
This Finding Antimatter guide will show where to find antimatter.
The player needs the antimatter recipe first. Head to the space and follow the glowing line to the next system.
Activate the scanning tool to look for the next objective and then explore the location. The player will get the recipe for the warp cell. Follow the objective to a nearby space station and buy some items from the galactic market there.
Put the warp cell into hyperdrive and go to the next system. Use the scanner there and locate a factory. The player will find the antimatter recipe there.
You can find the complete No Man’s Sky Guide here.