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WikiCards · Card list · Science cards · Lyman-alpha emitter
Common card · Science
Lyman-alpha emitter, a Common card
A Lyman-alpha emitter is a type of distant galaxy that emits Lyman-alpha radiation from neutral hydrogen.
- Rarity
- Common
- Domain
- Science
- ATK
- 62
- DEF
- 30
- Power
- 92
- Wikipedia reads a year
- 5,300
Power 92 (ATK + DEF): stronger than 35 % of WikiCards cards.
The facts on the card
The card carries these facts from its Wikipedia article.
- Most known LAEs are extremely distant, and because of the finite travel time of light they provide glimpses into the history of the universe.
- They are thought to be the progenitors of most modern Milky Way type galaxies.
- These galaxies can be found nowadays rather easily in narrow-band searches by an excess of their narrow-band flux at a wavelength which may be interpreted from their redshift 1 + z = λ 1215.67 Å where z is the redshift, λ is the observed wavelength, and 1215.67 Å is the wavelength of Lyman-alpha emission.
Why it is Common
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Lyman-alpha emitter article was read about 5,300 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 30: each hit it takes is cut by 12 %.
How to get Lyman-alpha emitter
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, Lyman-alpha emitter (revision), CC BY-SA 4.0. Photo : Left panel: D.Alexander et al. S.Chapman et al. T.Hayashino et al. J.Geach et al. Right Il, Public domain, Wikimedia Commons.
