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WikiCards · Card list · Science cards · Black hole
Legendary card · Science
Black hole, a Legendary card
A black hole is an astronomical body so compact that its gravity prevents anything, including light, from escaping.
- Rarity
- Legendary
- Domain
- Science
- ATK
- 94
- DEF
- 95
- Power
- 189
- Wikipedia reads a year
- 2,100,000
Power 189 (ATK + DEF): stronger than 95 % of WikiCards cards.
Black hole quiz: 3 questions
Three questions on the Black hole card, the way WikiCards duels ask them. Pick an answer, the facts are just below.
Find the missing word
The ______ of no escape is called the event horizon.
Answer
boundary. The boundary of no escape is called the event horizon. From the Black hole article on Wikipedia.
Which of these Wikipedia articles is read the most in a year?
Answer
Black hole. Black hole 2,100,000 · Rockwell B-1 Lancer 1,500,000 · Friedrich Hayek 330,000 · Antibiotic 250,000 Wikipedia reads over a year.
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.
- Albert Einstein's theory of general relativity, which describes gravitation as the curvature of spacetime, predicts that any sufficiently compact mass will form a black hole.
- The boundary of no escape is called the event horizon.
- In general relativity, crossing a black hole's event horizon traps an object inside but produces no locally detectable change.
Why it is Legendary
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Black hole article was read about 2,100,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 94 and blocks with 95: each hit it takes is cut by 38 %.
How to get Black hole
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 Black hole in the power ranking, all domains together.
- Kevin KeeganLegendary · Society · ATK 90 DEF 99
- Sinking of the TitanicLegendary · Arts · ATK 89 DEF 100
- Rod StewartLegendary · Arts · ATK 89 DEF 100
- Claudia SheinbaumLegendary · History · ATK 93 DEF 96
- Leonardo da VinciLegendary · Science · ATK 89 DEF 100
- MicrosoftLegendary · Society · ATK 96 DEF 93
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, Black hole (revision), CC BY-SA 4.0. Photo : Event Horizon Telescope , uploader cropped and converted TIF to JPG, CC BY 4.0, Wikimedia Commons.
