2MASS, a Common card

The card carries these facts from its Wikipedia article.

• It took place between 1997 and 2001, in two different locations: at the U.S. Fred Lawrence Whipple Observatory on Mount Hopkins, Arizona, and at the Cerro Tololo Inter-American Observatory in Chile, each using a 1.3-meter telescope for the Northern and Southern Hemisphere, respectively.
• It was conducted in the short-wavelength infrared at three distinct frequency bands near 2 micrometres, from which the photometric survey with its HgCdTe detectors derives its name.
• 2MASS produced an astronomical catalog with over 300 million observed objects, including minor planets of the Solar System, brown dwarfs, low-mass stars, nebulae, star clusters and galaxies.

Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The 2MASS article was read about 12,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 49 and blocks with 26: each hit it takes is cut by 10 %.

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.

The cards just above and just below 2MASS in the power ranking, all domains together.