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WikiCards · Card list · Science cards · Cygnus X-1
Uncommon card · Science
Cygnus X-1, an Uncommon card
Cygnus X-1 is a galactic X-ray source in the constellation Cygnus and was the first such source widely accepted to be a black hole.
- Rarity
- Uncommon
- Domain
- Science
- ATK
- 81
- DEF
- 91
- Power
- 172
- Wikipedia reads a year
- 120,000
Ranked #1,354 of the 3,000 cards of the base set by power (ATK + DEF).
Cygnus X-1 quiz: 3 questions
Three questions on the Cygnus X-1 card, the way WikiCards duels ask them. Pick an answer, the facts are just below.
Find the missing word
It remains among the most studied ______ objects in its class.
Answer
astronomical. It remains among the most studied astronomical objects in its class. From the Cygnus X-1 article on Wikipedia.
In which decade?
It was discovered in ____ during a rocket flight and is one of the strongest X-ray sources detectable from Earth, producing a peak X-ray flux density of 2.3×10−23 W/.
Answer
1960s. It was discovered in 1964 during a rocket flight and is one of the strongest X-ray sources detectable from Earth, producing a peak X-ray flux density of 2.3×10−23 W/. From the Cygnus X-1 article on Wikipedia.
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.
- It was discovered in 1964 during a rocket flight and is one of the strongest X-ray sources detectable from Earth, producing a peak X-ray flux density of 2.3×10−23 W/.
- It remains among the most studied astronomical objects in its class.
- The compact object is now estimated to have a mass about 21.2 times the mass of the Sun and has been shown to be too small to be any known kind of normal star or other likely object besides a black hole.
Why it is Uncommon
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Cygnus X-1 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 81 and blocks with 91: each hit it takes is cut by 36 %.
How to get Cygnus X-1
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 Cygnus X-1 in the power ranking, all domains together.
- LanzhouUncommon · Society · ATK 81 DEF 91
- Breeder reactorUncommon · Society · ATK 83 DEF 89
- LivestockUncommon · Nature · ATK 76 DEF 96
- Lu XunUncommon · Arts · ATK 79 DEF 93
- Al AinUncommon · Society · ATK 81 DEF 91
- Ali al-RidaUncommon · History · ATK 78 DEF 94
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, Cygnus X-1 (revision), CC BY-SA 4.0. Photo : IAU and Sky & Telescope magazine (Roger Sinnott & Rick Fienberg), CC BY 4.0, Wikimedia Commons.
