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WikiCards · Card list · Science cards · Accretion disk
Uncommon card · Science
Accretion disk, an Uncommon card
An accretion disk is a structure formed by diffuse material in orbital motion around a massive central body.
- Rarity
- Uncommon
- Domain
- Science
- ATK
- 72
- DEF
- 69
- Power
- 141
- Wikipedia reads a year
- 120,000
Ranked #2,093 of the 3,000 cards of the base set by power (ATK + DEF).
The facts on the card
The card carries these facts from its Wikipedia article.
- The central body is most frequently a star.
- Friction, uneven irradiance, magnetohydrodynamic effects, and other forces induce instabilities causing orbiting material in the disk to spiral inward toward the central body.
- Gravitational and frictional forces compress and raise the temperature of the material, causing the emission of electromagnetic radiation.
Why it is Uncommon
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Accretion disk article was read about 120,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 72 and blocks with 69: each hit it takes is cut by 28 %.
How to get Accretion disk
Open packs. Each pack holds five cards drawn from real Wikipedia articles, the rarest last, and the fifth card is always Rare or better. The odds are shown in the game. A free pack arrives every hour and two can wait, and the Coins you win in duels buy more packs.
More Science cards
Cards close in power
The cards just above and just below Accretion disk in the power ranking, all domains together.
- EconomyUncommon · Society · ATK 72 DEF 69
- List of HTTP header fieldsUncommon · Science · ATK 76 DEF 65
- Yaroslav the WiseUncommon · History · ATK 71 DEF 70
- ArgentavisUncommon · Nature · ATK 71 DEF 70
- Attu IslandUncommon · Nature · ATK 74 DEF 67
- CollageUncommon · Arts · ATK 74 DEF 67
Card lists
- Wikipedia quizNew questions every day
- All cards from A to ZEvery card, by name
- Science cards
- Legendary cards
- Tier listS and A tiers by power (ATK + DEF)
Credits
Text : Wikipedia, Accretion disk (revision), CC BY-SA 4.0. Photo : NASA’s Goddard Space Flight Center/Jeremy Schnittman, CC BY-SA 4.0, Wikimedia Commons.
