WikiCards · Card list · Science cards · H II region
Uncommon card · Science
H II region, an Uncommon card
An H II region is a region of interstellar atomic hydrogen that is ionized.
- Rarity
- Uncommon
- Domain
- Science
- ATK
- 72
- DEF
- 76
- Power
- 148
- Wikipedia reads a year
- 39,000
Power 148 (ATK + DEF): stronger than 80 % of WikiCards cards.
The facts on the card
The card carries these facts from its Wikipedia article.
- It is typically in a molecular cloud of partially ionized gas in which star formation has recently taken place, with a size ranging from one to hundreds of light years, and density from a few to about a million particles per cubic centimetre.
- The Orion Nebula, now known to be an H II region, was observed in 1610 by Nicolas-Claude Fabri de Peiresc by telescope, the first such object discovered.
- The regions may be of any shape because the distribution of the stars and gas inside them is irregular.
Why it is Uncommon
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The H II region article was read about 39,000 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 76: each hit it takes is cut by 30 %.
How to get H II region
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
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The cards just above and just below H II region in the power ranking, all domains together.
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- Great Bear RainforestUncommon · Nature · ATK 71 DEF 77
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- Animal migrationUncommon · Nature · ATK 72 DEF 76
Card lists
- All cards from A to ZEvery card, by name
- Nature cards600 cards
- Science cards600 cards
- History cards600 cards
- Arts cards600 cards
- Society cards600 cards
- Tier listS and A tiers by power (ATK + DEF)
- Legendary cards136 cards
- Epic cards262 cards
- Strongest cardsTop 100 by attack
Credits
Text : Wikipedia, H II region (revision), CC BY-SA 4.0. Photo : Hui Yang (University of Illinois) and NASA/ESA, Public domain, Wikimedia Commons.







