Additions:

Meteorite Block, Meteorite Bricks, Chiseled Meteorite Block with an ignited variant.
Cosmic Torch, Lantern, Campfire.
Block of Stardust.
New sounds for Meteorite Blocks (faint humming), Cosmic Fire (noisy crackling), Celestial Respawn Anchors.
New particles for Cosmic Fire.
Stratos-based Chest variants.
Basic compatibility for L_Ender's Cataclysm, Ice and Fire, Identity, and The Twilight Forest.

Changes:

Drifting Events & Meteors can now happen in any dimension tagged as "has_drifting_events", and "has_meteors", respectively.
Celestial Debris has new glowy textures.
Celestizens have gotten a few visual changes & sounds
Celestial Gem Blocks have had a slight visual overhaul.
Quicksilt will now block your view when standing in it.
Celestizens will no longer despawn in Peaceful mode.
Nightshroom Blocks & Shelf Mushrooms should now appear slightly brigher in the inventory.
Meteor Smoke matches closer to the color of Cosmic Fire, and has new sprites.
Red dye can now be crafted from Wisp Willow Vines.

Fixed some stale assets being referenced, leading to annoying messages in the log.
Fixed Morel stems rendering wrong for some reason.
Fixed Cosmic Burning being permanent on the client.
Fixed Meteor Smoke having weird rendering bugs whenever custom render type particles are on screen.
Fixed many Celestizen bugs.
Fixed Miry Path and Farmland blocks decaying into dirt and being completely unusable. :(
Fixed boss bar rendering issues. This was only visible when playing with other mods that have custom boss bar renderers - a second boss bar would be rendered overtop.
Fixed incompatibility issues relating to access transformers.
Fixed Celestizen rotations.
Fixed annoying message that kept popping up when playing with Malum.