BACK UP ALL ASSETS BEFORE INSTALLING THIS MOD!

Step 1 - Copy all the files inside the Assets folder into your Starbound/Assets folder
Step 2 - Open Celestial.config in your assets folder
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Change Line 40 from:

"unlockedBiomes" : [ "arid", "desert", "forest", "snow", "moon" ]

to:

"unlockedBiomes" : [ "arid", "desert", "forest", "snow", "moon", "toxic" ]
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Change Line 54 from:

"unlockedBiomes" : [ "arid", "desert", "forest", "snow", "moon", "jungle" ]

to:

"unlockedBiomes" : [ "arid", "desert", "forest", "snow", "moon", "jungle", "toxic" ]
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Change Line 68 from:

"unlockedBiomes" : [ "arid", "desert", "forest", "snow", "moon", "jungle", "grasslands" ]

to:

"unlockedBiomes" : [ "arid", "desert", "forest", "snow", "moon", "jungle", "grasslands", "toxic" ]
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Change Line 82 from:

"unlockedBiomes" : [ "arid", "desert", "forest", "snow", "moon", "jungle", "grasslands", "magma", "tentacles", "tundra", "volcanic" ]

to:

"unlockedBiomes" : [ "arid", "desert", "forest", "snow", "moon", "jungle", "grasslands", "magma", "tentacles", "tundra", "volcanic", "toxic" ]
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Change Line 308 from:

"availableBiomes" : [ "tentacles", "magma", "volcanic", "desert" ]

to

"availableBiomes" : [ "tentacles", "magma", "volcanic", "desert", "toxic" ]
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Change Line 313 from:

"availableBiomes" : [ "tentacles", "desert", "arid", "ocean", "savannah", "grasslands", "jungle", "forest" ]

to:

"availableBiomes" : [ "tentacles", "desert", "arid", "ocean", "savannah", "grasslands", "jungle", "forest", "toxic" ]
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Change Line 318 from:

"availableBiomes" : [ "snow", "tundra", "arctic" ]

to

"availableBiomes" : [ "snow", "tundra", "arctic", "toxic" ]
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OR IF YOU DONT HAVE ANY OTHER MODS YOU CAN COPY "celestial.config" FROM THIS FOLDER INTO YOUR ASSETS FOLDER AND OVERRIDE!