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WikiCards · Card list · Science cards · CNO cycle
Uncommon card · Science
CNO cycle, an Uncommon card
In astrophysics, the carbon–nitrogen–oxygen cycle, sometimes called Bethe–Weizsäcker cycle after Hans Albrecht Bethe and Carl Friedrich von Weizsäcker, is one of the two known sets of fusion reactions by which stars convert hydrogen to helium, the other being the proton–proton chain reaction, which is more efficient…
- Rarity
- Uncommon
- Domain
- Science
- ATK
- 72
- DEF
- 57
- Power
- 129
- Wikipedia reads a year
- 50,000
Power 129 (ATK + DEF): stronger than 65 % of WikiCards cards.
The facts on the card
The card carries these facts from its Wikipedia article.
- The CNO cycle is hypothesized to be dominant in stars that are more than 1.3 times as massive as the Sun.
- Unlike the proton-proton reaction, which consumes all its constituents, the CNO cycle is a catalytic cycle.
- In the CNO cycle, four protons fuse, using isotopes of carbon, nitrogen, and oxygen as catalysts, each of which is consumed at one step of the CNO cycle, but re-generated in a later step.
Why it is Uncommon
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The CNO cycle article was read about 50,000 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 57: each hit it takes is cut by 23 %.
How to get CNO cycle
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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Credits
Text : Wikipedia, CNO cycle (revision), CC BY-SA 4.0. Photo : RJHall translator: Manlleus (ca/es), CC BY-SA 3.0, Wikimedia Commons.
