Astrology

Astrology is a skill that provides passive buffs to various other skills in the game similar to the

This page was last updated for (v1.2).

Astrology

This article is about the Astrology skill. For training the skill, see Astrology/Training.

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Agility

skill.

Modifiers will be unlocked as you level up your mastery in each constellation, and the buff can be upgraded by spending Stardust or Golden Stardust to level up that buff to a maximum level of 5 for Golden Stardust buffs and 8 for Stardust buffs.

Mechanics

Leveling Astrology involves Studying various Constellations, starting with the Deedree Constellation at level 1. Studying has a base interval of 3 seconds per action. Studying does not cost any resources and provides Astrology experience and Mastery experience for the Constellation after each action.

Each Study action also has a chance to provide Stardust, Golden Stardust, or to () discover a Meteorite.

Acquiring Stardust

Both Stardust and Golden Stardust are exclusively obtained from Astrology. Both are acquired at random while studying constellations, where Stardust and Golden Stardust drops with a 5% and 2% chance per action respectively.

The rate at which stardust may be acquired can be increased by:

• Decreasing the action interval
  • Secret Stardust Potion reduces the action interval by 3/5/10/15% depending on the potion's tier. Note that since the potions themselves use Stardust as an ingredient, maximizing the
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    Herblore preservation and doubling chances before creating any of these potions is highly recommended.
  • 
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    Variel reduces the action interval by 5%.
  • Superior Astrology Skillcape reduces the action interval by 10%.
  • Owl + Eagle Synergy reduces the action interval by 10%
    • Owl itself provides 5% interval reduction, so equipping the synergy gives a total of 15% action interval reduction.
• Increasing the drop chance
  • Stardust:
    • The 25% Mastery pool checkpoint provides a +5% bonus to the drop chance
    • 
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      Variel provides a +2% bonus
    • 
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      Rosaniya provides a +4% bonus
  • Golden Stardust:
    • The 50% Mastery pool checkpoint provides a +3% bonus to the drop chance
    • The 95% Mastery pool checkpoint provides a +2% bonus
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      Astro provides a +1% bonus
    • 
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      Variel provides a +2.5% bonus
  • Meteorite Ore:
    • The 95% Mastery pool checkpoint provides a +2% bonus
    • 
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      Variel provides a +0.5% bonus
• Increasing the drop quantity
  • Equipping Astrology Skillcape provides a +1 bonus to the quantity of both Stardust and Golden Stardust that is dropped.
  • Equipping Superior Astrology Skillcape provides a +2 bonus to the quantity of both Stardust and Golden Stardust that is dropped.
  • Both types of Stardust are affected by doubling modifiers, such as:
    • Aorpheat's Signet Ring
    • Some
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      Agility courses
    • The
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      Mastery Level 40 star in
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      Rosaniya

Modifiers

Each Constellation starts with 6 predetermined Stars (modifiers) that are unlocked by increasing the

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Mastery

Level of the Constellation. Upgrading Stars that provide standard modifiers costs Stardust, while upgrading Stars that provide unique modifiers costs Golden Stardust. The modifier starts at 0, so you need to use the appropriate type of Stardust to benefit from a Stars' modifiers.

The maximum amount of upgrades you can put into a Star modifier is determined by the type of modifier. Normal modifiers can go up to level 8, whereas unique modifiers can only go up to level 5. Each upgrade gives a linear increase to the bonus.

The first upgrade requires 10 Stardust or 50 Golden Stardust. With each upgrade, the cost of Stardust or Golden Stardust will double, resulting in the last upgrade of a star costing 1,280 Stardust or 800 Golden Stardust. Each standard modifier requires 2,550 Stardust to max out, while each unique modifier requires 1,550 Golden Stardust 1550 to max out. This results in the following total cost by expansion:

Total Cost by Expansion	Stardust	Golden Stardust
Full Version	84,150	51,150
Throne of the Herald Expansion	30,600	18,600
Atlas of Discovery Expansion	7,650	4,650
Combined Full Version + +	122,400	74,400

Despite the wording Unique Modifier, the modifiers do stack with similar types of modifiers, e.g.

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Deedree

's

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Mastery

Level 20 star (up to +5% Farming Yield) stacks with the +3% Farming Yield from Bob's Gloves

Mastery Unlocks

Item Mastery Unlocks

Level	Unlock
20	Unlock another Star (Unique Modifier)
40	Unlock another Star (Standard Modifier)
60	Unlock another Star (Unique Modifier)
80	Unlock another Star (Standard Modifier)
99	Unlock another Star (Unique Modifier)

Mastery Pool Checkpoints

Pool %	Pool XP	Bonus
10%	800,000 xp	+5% Astrology Mastery XP for Melvor Realm only
25%	2,000,000 xp	+5% chance to gain Stardust in Astrology
50%	4,000,000 xp	+3% chance to gain Golden Stardust in Astrology
95%	7,600,000 xp	+2% chance to locate a Meteorite in Astrology +2% chance to gain Golden Stardust in Astrology
Total Mastery Pool XP		8,000,000

Skillcape

The skillcape can be purchased from the store for 1,000,000 after the player reaches

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Level 99

.
The superior skillcape can be purchased from the store for 10,000,000 after the player reaches

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Level 120

.

Regular Skillcape

The Astrology Skillcape is the skillcape for the Astrology skill. It can be purchased for 1,000,000 from the Shop once the player reaches

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Level 99

in the Astrology skill. The Astrology Skillcape offers the following benefits when worn:

+1 base quantity when gaining Stardust from Astrology and +1 base quantity when gaining Golden Stardust from Astrology

Superior Skillcape

The Superior Astrology Skillcape is the superior skillcape for the Astrology skill. It can be purchased for 10,000,000 from the Shop once the player reaches

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Level 120

in the Astrology skill.

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Level 120

can only be reached if the player owns the Throne of the Herald expansion. Likewise, the superior skillcape can only be purchased if the player owns this expansion. The superior skillcape offers the following benefits when worn:

+2 base quantity when gaining Stardust from Astrology, +2 base quantity when gaining Golden Stardust from Astrology, and -10% Astrology Interval

Pet

The pet can be unlocked by doing any Astrology action.

Pet	Name	DLC	Effect
Error creating thumbnail: File missing	Astro		+1% chance to gain Golden Stardust in Astrology

Constellations

The bonuses listed below are the maximum possible.

Constellation		Error creating thumbnail: File missing Level	DLC	XP	Skills	Standard Stars		Unique Stars
						Error creating thumbnail: File missing Level	Modifiers	Error creating thumbnail: File missing Level	Modifiers
Error creating thumbnail: File missing	Deedree	1		5	Error creating thumbnail: File missing Woodcutting Error creating thumbnail: File missing Farming	1	+8% Woodcutting Skill XP +8% Farming Skill XP	20	+5% chance to gain Bird Nest in Woodcutting
						40	+8% Woodcutting Mastery XP +8% Farming Mastery XP	60	+5% base primary resource quantity gained in Farming
						80	+8% Chance to Double Items in Woodcutting +8% Chance to Double Items in Farming	99	+5% chance to gain Stardust from Magic Tree in Woodcutting (Quantity equal to primary skill resource quantity)
Error creating thumbnail: File missing	Iridan	10		13	Error creating thumbnail: File missing Attack Error creating thumbnail: File missing Smithing	1	+8% Accuracy Rating +8% Attack Skill XP	20	+5 Hidden Attack Level
						40	+8% Smithing Mastery XP +8% Smithing Skill XP	60	-5% Smithing Interval
						80	+8% Chance to Double Items in Smithing	99	+5% of Maximum Hit added to Minimum Hit
Error creating thumbnail: File missing	Ameria	20		21	Error creating thumbnail: File missing Fishing Error creating thumbnail: File missing Firemaking	1	+8% Fishing Skill XP +8% Firemaking Skill XP	20	+5% chance to receive Special Items from Fishing
						40	+8% Fishing Mastery XP +8% Firemaking Mastery XP	60	-5% Fishing Interval -5% Firemaking Interval
						80	+8% Chance to Double Items in Fishing +8% Chance to Double Items in Firemaking	99	+5% chance to gain 1 Diamond from Firemaking (Cannot be doubled)
Error creating thumbnail: File missing	Terra	30		29	Error creating thumbnail: File missing Strength Error creating thumbnail: File missing Mining	1	+8% Accuracy Rating +8% Strength Skill XP	20	+5 Hidden Strength Level +5% Melee Strength Bonus from Equipment
						40	+8% Mining Mastery XP +8% Mining Skill XP	60	+5% Chance to receive gems from Mining (Does not work for Rune Essence)
						80	+8% Chance to Double Items in Mining	99	+5% chance to deal no damage to Essence Nodes in Mining +5% chance to deal no damage to Ore Nodes in Mining
Error creating thumbnail: File missing	Vale	40		37	Error creating thumbnail: File missing Hitpoints Error creating thumbnail: File missing Cooking	1	+8% Accuracy Rating +8% Hitpoints Skill XP	20	-5% Cooking Interval
						40	+8% Cooking Mastery XP +8% Cooking Skill XP	60	+5% Lifesteal
						80	+8% Chance to Double Items in Cooking	99	+5% Food Healing Value +5% Chance to Preserve Food when eaten
Error creating thumbnail: File missing	Nysa	45		41	Error creating thumbnail: File missing Archaeology Error creating thumbnail: File missing Cartography	1	+8% Archaeology Skill XP +8% Cartography Skill XP	20	-5 dig site map refinement cost
						40	+8% chance to preserve dig site map excavation actions	60	-5% Cartography survey interval
						80	+8% Archaeology Mastery XP	99	+5% Chance to Double Items in Archaeology +5% Chance to Double Items in Cartography
Error creating thumbnail: File missing	Syllia	50		45	Error creating thumbnail: File missing Ranged Error creating thumbnail: File missing Fletching	1	+8% Accuracy Rating +8% Ranged Skill XP	20	+5 Hidden Ranged Level +5% Ranged Strength Bonus from Equipment
						40	+8% Fletching Mastery XP +8% Fletching Skill XP	60	+5% Ammo Preservation
						80	+8% Chance to Double Items in Fletching	99	+5% Chance to gain +1 additional resource in Fletching (Cannot be doubled)
Error creating thumbnail: File missing	Arachi	60		53	Error creating thumbnail: File missing Magic Error creating thumbnail: File missing Runecrafting	1	+8% Accuracy Rating +8% Magic Skill XP	20	+5 Hidden Magic Level +5% Magic Damage Bonus from Equipment
						40	+8% Runecrafting Mastery XP +8% Runecrafting Skill XP	60	+5% Rune Preservation for Alt. Magic Spells
						80	+8% Chance to Double Items in Runecrafting	99	+5% Chance to receive random Elemental Runes from Runecrafting when creating Runes
Error creating thumbnail: File missing	Ko	70		61	Error creating thumbnail: File missing Agility Error creating thumbnail: File missing Thieving	1	+8% Thieving Skill XP +8% Agility Skill XP	20	-5% Thieving Interval -5% Agility Interval
						40	+8% Thieving Mastery XP +8% Agility Mastery XP	60	+5% GP gained from Agility
						80	+8% Chance to Double Items in Thieving	99	+50 Stealth while Thieving
Error creating thumbnail: File missing	Tellus	80		69	Error creating thumbnail: File missing Defence Error creating thumbnail: File missing Slayer	1	+8 Hidden Defence Level +8% Defence Skill XP	20	+5% Global Slayer Coins (except Item Sales)
						40	+8% Slayer Skill XP	60	+5% Damage to Monsters in Slayer Areas
						80	+8% GP from Combat	99	+5% Reflect Damage
Error creating thumbnail: File missing	Hyden	90		77	Error creating thumbnail: File missing Prayer Error creating thumbnail: File missing Crafting	1	+8% Prayer Skill XP	20	-5% Crafting Interval
						40	+8% Crafting Mastery XP +8% Crafting Skill XP	60	+5% Chance to gain +1 additional resource in Crafting (Cannot be doubled)
						80	+8% Chance to Double Items in Crafting	99	+5% Chance To Preserve Prayer Points
Error creating thumbnail: File missing	Qimican	95		85	Error creating thumbnail: File missing Summoning Error creating thumbnail: File missing Herblore	1	+8% Herblore Skill XP +8% Summoning Skill XP	20	-5% Herblore Interval -5% Summoning Interval
						40	+8% Herblore Mastery XP +8% Summoning Mastery XP	60	+5% Chance To Preserve Potion Charge
						80	+8% Chance to Double Items in Herblore +8% Chance to Double Items in Summoning	99	+5% Chance to preserve Summoning Charges
Error creating thumbnail: File missing	Variel	100		155	Error creating thumbnail: File missing Astrology	1	+8% Astrology Skill XP	20	-5% Astrology Interval
						40	+8% Astrology Mastery XP for Melvor Realm only	60	+2.5% chance to gain Golden Stardust in Astrology
						80	+2% chance to gain Stardust in Astrology	99	+0.5% chance to locate a Meteorite in Astrology
Error creating thumbnail: File missing	Haemir	105		235	Error creating thumbnail: File missing Township	1	+8% Township Skill XP	20	+5% Township Happiness
						40	+8% Township Resource Generation	60	-5% Township Building Cost (Capped at -80%)
						80	+8% Township Max Storage	99	+5% Township Education
Error creating thumbnail: File missing	Rosaniya	110		335	Error creating thumbnail: File missing Woodcutting Error creating thumbnail: File missing Fishing Error creating thumbnail: File missing Firemaking Error creating thumbnail: File missing Cooking Error creating thumbnail: File missing Mining Error creating thumbnail: File missing Smithing Error creating thumbnail: File missing Farming Error creating thumbnail: File missing Thieving Error creating thumbnail: File missing Fletching Error creating thumbnail: File missing Crafting Error creating thumbnail: File missing Runecrafting Error creating thumbnail: File missing Herblore Error creating thumbnail: File missing Agility Error creating thumbnail: File missing Summoning Error creating thumbnail: File missing Astrology Error creating thumbnail: File missing Township	1	+8% chance to receive a Quality Superior Gem while Mining Gem Veins or Meteorite Ore	20	+5% Global GP (except Item Sales)
						40	+8% Chance to Double Items Globally	60	+50 Bank Space
						80	+4% chance to gain Stardust in Astrology	99	+5% Mastery XP for Melvor Realm only
Error creating thumbnail: File missing	Ashtar	115		475	Error creating thumbnail: File missing Attack Error creating thumbnail: File missing Strength Error creating thumbnail: File missing Defence Error creating thumbnail: File missing Hitpoints Error creating thumbnail: File missing Ranged Error creating thumbnail: File missing Magic Error creating thumbnail: File missing Prayer Error creating thumbnail: File missing Slayer	1	+8% Auto Eat Efficiency	20	-5% Attack Interval
						40	+8% Damage To Slayer Tasks	60	+5% Flat Slayer Area Effect Negation
						80	+8% Chance To Double Loot in Combat	99	Gives the enemy: -5% Damage Reduction

Potions

The Secret Stardust Potion reduces the interval for Study actions.

Secret Stardust Potion
Potion	Tier	Charges	Effect
	I	5	-3% Astrology Interval
	II	10	-5% Astrology Interval
	III	15	-10% Astrology Interval
	IV	25	-15% Astrology Interval

The Star Seeker Potion increases the chance of finding Golden Stardust.

Star Seeker Potion
Potion	Tier	Charges	Effect
	I	15	+1% chance to gain Golden Stardust in Astrology
	II	25	+2% chance to gain Golden Stardust in Astrology
	III	35	+3% chance to gain Golden Stardust in Astrology
	IV	50	+5% chance to gain Golden Stardust in Astrology

Summoning Boosts

This table shows all the

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Summoning

Familiars and Synergies that provide a bonus to Astrology.

Familiar 1		Familiar 2		DLC	Effect
	Owl				-5% Astrology Interval
Error creating thumbnail: File missing	Devil		Owl		Adds an additional +4 to regular stardust drops, gain no golden stardust
	Eagle		Owl		-10% Astrology interval for Melvor Realm only

Skill Boosts

This table lists most sources of Astrology-specific modifier boosts. For a list of boosts that apply to all skills, see the Skill Boosts page. This list does not contain boosts provided from

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Mastery

rewards.

Melvor Idle version v1.3.1 (Released: 30th October 2024)
Error creating thumbnail: File missing Combat: Error creating thumbnail: File missing Attack • Error creating thumbnail: File missing Strength • Error creating thumbnail: File missing Defence • Error creating thumbnail: File missing Hitpoints • Error creating thumbnail: File missing Ranged • Error creating thumbnail: File missing Magic • Error creating thumbnail: File missing Prayer • Error creating thumbnail: File missing Slayer • Error creating thumbnail: File missing Corruption
Skills: Error creating thumbnail: File missing Farming • Error creating thumbnail: File missing Township • Error creating thumbnail: File missing Woodcutting • Error creating thumbnail: File missing Fishing • Error creating thumbnail: File missing Firemaking • Error creating thumbnail: File missing Cooking • Error creating thumbnail: File missing Mining • Error creating thumbnail: File missing Smithing • Error creating thumbnail: File missing Thieving • Error creating thumbnail: File missing Fletching • Error creating thumbnail: File missing Crafting • Error creating thumbnail: File missing Runecrafting • Error creating thumbnail: File missing Herblore • Error creating thumbnail: File missing Agility • Error creating thumbnail: File missing Summoning • Error creating thumbnail: File missing Astrology • Error creating thumbnail: File missing Alternative Magic • Error creating thumbnail: File missing Cartography • Error creating thumbnail: File missing Archaeology • Error creating thumbnail: File missing Harvesting
Other: Error creating thumbnail: File missing Beginners Guide • Guides • Error creating thumbnail: File missing Bank • Error creating thumbnail: File missing Combat • Error creating thumbnail: File missing Mastery • Error creating thumbnail: File missing Money Making • Error creating thumbnail: File missing Shop • Easter Eggs • Pets • Error creating thumbnail: File missing Golbin Raid • Error creating thumbnail: File missing Full Version • Throne of the Herald • Atlas of Discovery • Error creating thumbnail: File missing Into the Abyss
Reference Tables: Items, Equipment, Experience Table, Upgrading Items, Combat Areas, Slayer Areas, Dungeons, Strongholds, The Abyss, Monsters