Pretty particles and powerful perks, look up at night and you might discover something.
Get the Astral Tome + Resonating Wand. Find the first 5 constellation papers and put a crafting table near a Collector Crystal. Make sure the Crystal has a clear view to the sky. While holding the Resonating Wand in your off-hand, run/fly around the night and look for shiny spots on the ground, dig down and look for Rock Crystals.
Craft the Lightwell, throw some Aquamarines in it, and craft the Starlight Crafting Altar. Get the Looking Glass, 8x Astral Relays and optionally a Cave Illuminator.
Get the Linking Tool, put Iron Ore next to a collector Crystal and link the Crystal to the ore. make a bunch of Starmetal Ingots. Craft the Telescope, Attunement Altar and Starmetal Cutting Tool. Finally, the Celestial Altar.
Get the Starlight Infuser. Get one of your Rock Crystals and throw it in Liquid Starlight together with Starmetal Dust. Craft the Iridescent Altar. Get the Starlight Infuser.