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WikiCards · Card list · Science cards · Habitable zone
Uncommon card · Science
Habitable zone, an Uncommon card
In astronomy and astrobiology, the habitable zone, also known as the circumstellar habitable zone, or as the Goldilocks zone, is the range of orbits around a star within which a planetary surface could potentially support liquid water.
- Rarity
- Uncommon
- Domain
- Science
- ATK
- 88
- DEF
- 95
- Power
- 183
- Wikipedia reads a year
- 120,000
Power 183 (ATK + DEF): stronger than 95 % of WikiCards cards.
The facts on the card
The card carries these facts from its Wikipedia article.
- Liquid water is considered by many scientists as necessary for a planet to be habitable.
- The range depends upon the brightness of the star interacting with a planet's atmosphere.
- At the inner edge the star's light, trapped by greenhouse gases in a planet's atmosphere, boils off the planet's water.
Why it is Uncommon
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Habitable zone 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 88 and blocks with 95: each hit it takes is cut by 38 %.
How to get Habitable zone
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.
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Card lists
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- All cards from A to ZEvery card, by name
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Credits
Text : Wikipedia, Habitable zone (revision), CC BY-SA 4.0. Photo : NASA / JPL-Caltech / Olivier de Goursac, Public domain, Wikimedia Commons.
