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WikiCards · Card list · Science cards · Common envelope
Common card · Science
Common envelope, a Common card
In astronomy, a common envelope is gas that contains a binary-star system.
- Rarity
- Common
- Domain
- Science
- ATK
- 55
- DEF
- 31
- Power
- 86
- Wikipedia reads a year
- 6,000
Power 86 (ATK + DEF): stronger than 30 % of WikiCards cards.
Common envelope quiz: 3 questions
Three questions on the Common envelope card, the way WikiCards duels ask them. Pick an answer, the facts are just below.
Find the missing word
The gas does not rotate at the same rate as the ______ binary system.
Answer
embedded. The gas does not rotate at the same rate as the embedded binary system. From the Common envelope article on Wikipedia.
Which of these cards hits hardest (highest ATK)?
Answer
Robert B. Leighton. Robert B. Leighton 59 · Common envelope 55 · Extrusive rock 48 · Kytoon 45 ATK in WikiCards.
In a duel, each round asks a question like these about the opposing card, with 15 seconds to answer.
The facts on the card
The card carries these facts from its Wikipedia article.
- The gas does not rotate at the same rate as the embedded binary system.
- A system with such a configuration is said to be in a common-envelope phase or undergoing common-envelope evolution.
- During a common-envelope phase, the embedded binary system is subject to drag forces from the envelope, which cause the separation of the two stars to decrease.
Why it is Common
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Common envelope article was read about 6,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 55 and blocks with 31: each hit it takes is cut by 12 %.
How to get Common envelope
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 Common envelope in the power ranking, all domains together.
- Otto OrseoloCommon · History · ATK 57 DEF 29
- Senapati of MataramCommon · History · ATK 58 DEF 28
- Wendell Meredith StanleyCommon · Science · ATK 55 DEF 31
- Enzo IacchettiCommon · Arts · ATK 53 DEF 33
- KytoonCommon · Society · ATK 45 DEF 41
- Portugal Cove–St. Philip'sCommon · Society · ATK 56 DEF 30
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, Common envelope (revision), CC BY-SA 4.0. Photo : Philip D. Hall, CC BY-SA 4.0, Wikimedia Commons.
