Many building blocks are needed to support life, including water, carbon dioxide, methane, ammonia, and hydrogen gas (Smithsonian Magazine). To be considered “potentially habitable”, a planet must be up to 2.5 times the size of the Earth or up to 10 times Earth’s mass and orbit the right distance from its star for liquid water to possibly be present (Planetary Habitability Laboratory).

The date a planet is discovered may be different than the date it is found to be potentially habitable, because a planet's habitability is determined through an analysis of data beyond just its discovery. Consequently, exoplanets can be added or removed from the list as more data become available and is analyzed.

Exoplanets being removed from the list will not affect resolution so long as at least 5 more exoplanets are found to be potentially habitable within the timeframe of the question. In other words, the question may still be resolved as "Yes" even if the catalog shows less than 74 potentially habitable exoplanets (i.e., 69 at the time the question launched + 5), if 5 planets are added but some are also removed from the list.

The INFER Team has the list of the 69 exoplanets included in the catalog at the time the question was launched in this spreadsheet. Note that this spreadsheet will not be updated and will only serve as a reference for resolution.