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WikiCards · Card list · Science cards · Ritchey–Chrétien telescope
Uncommon card · Science
Ritchey–Chrétien telescope, an Uncommon card
A Ritchey–Chrétien telescope is a specialized variant of the Cassegrain telescope that has a hyperbolic primary mirror and a hyperbolic secondary mirror designed to eliminate off-axis optical errors.
- Rarity
- Uncommon
- Domain
- Science
- ATK
- 62
- DEF
- 45
- Power
- 107
- Wikipedia reads a year
- 23,000
Power 107 (ATK + DEF): stronger than 45 % of WikiCards cards.
Ritchey–Chrétien telescope quiz: 3 questions
Three questions on the Ritchey–Chrétien telescope card, the way WikiCards duels ask them. Pick an answer, the facts are just below.
Find the missing word
The RCT has a wider field of view free of ______ errors compared to a more traditional reflecting telescope configuration.
Answer
optical. The RCT has a wider field of view free of optical errors compared to a more traditional reflecting telescope configuration. From the Ritchey–Chrétien telescope article on Wikipedia.
Which of these cards hits hardest (highest ATK)?
Answer
Hayden White. Hayden White 67 · Ritchey–Chrétien telescope 62 · Ralph Merkle 59 · Hydrogen bromide 56 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 RCT has a wider field of view free of optical errors compared to a more traditional reflecting telescope configuration.
- Since the mid 20th century, a majority of large professional research telescopes have been Ritchey–Chrétien configurations, some well-known examples are the Hubble Space Telescope, the Keck telescopes and the ESO Very Large Telescope.
Why it is Uncommon
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Ritchey–Chrétien telescope article was read about 23,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 62 and blocks with 45: each hit it takes is cut by 18 %.
How to get Ritchey–Chrétien telescope
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 Ritchey–Chrétien telescope in the power ranking, all domains together.
- Pierre BayleUncommon · Science · ATK 62 DEF 45
- Rabanus MaurusUncommon · Arts · ATK 62 DEF 45
- Ralph MerkleUncommon · Science · ATK 59 DEF 48
- Talant DujshebaevUncommon · Society · ATK 64 DEF 43
- Ahmed Mohamed IslamUncommon · History · ATK 63 DEF 44
- Arjun AppaduraiUncommon · Science · ATK 64 DEF 43
Card lists
- Wikipedia quizNew questions every day
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- Tier listS and A tiers by power (ATK + DEF)
Credits
Text : Wikipedia, Ritchey–Chrétien telescope (revision), CC BY-SA 4.0. Photo : Kowloonese at English Wikipedia, Public domain, Wikimedia Commons.
