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Uncommon card · Science
GW170817, an Uncommon card
GW170817 was a gravitational wave observed by the LIGO and Virgo detectors on 17 August 2017, originating within the shell elliptical galaxy NGC 4993, about 140 million light years away.
- Rarity
- Uncommon
- Domain
- Science
- ATK
- 82
- DEF
- 95
- Power
- 177
- Wikipedia reads a year
- 42,000
Power 177 (ATK + DEF): stronger than 90 % of WikiCards cards.
GW170817 quiz: 3 questions
Three questions on the GW170817 card, the way WikiCards duels ask them. Pick an answer, the facts are just below.
Find the missing word
It is the first GW detection to be definitively correlated with any ______ observation.
Answer
electromagnetic. It is the first GW detection to be definitively correlated with any electromagnetic observation. From the GW170817 article on Wikipedia.
In which decade?
GW170817 was a gravitational wave observed by the LIGO and Virgo detectors on 17 August ____, originating within the shell elliptical galaxy NGC 4993, about 140 million light years away.
Answer
2010s. GW170817 was a gravitational wave observed by the LIGO and Virgo detectors on 17 August 2017, originating within the shell elliptical galaxy NGC 4993, about 140 million light years away. From the GW170817 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.
- The wave was produced by the last moments of the inspiral of a binary pair of neutron stars, ending with their merger.
- It is the first GW detection to be definitively correlated with any electromagnetic observation.
- Unlike the five prior GW detections, which were of merging black holes and thus not expected to have detectable electromagnetic signals, the aftermath of this merger was seen across the electromagnetic spectrum by 70 observatories on 7 continents and in space, marking a significant breakthrough for multi-messenger astronomy.
Why it is Uncommon
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The GW170817 article was read about 42,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 82 and blocks with 95: each hit it takes is cut by 38 %.
How to get GW170817
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, GW170817 (revision), CC BY-SA 4.0. Photo : LIGO Scientific Collaboration and Virgo Collaboration, CC BY-SA 4.0, Wikimedia Commons.
