The phrase "hotter planet" refers to a situation where the Earth's temperature increases significantly, causing the overall climate and weather to become hotter. Full definition
And although that search will likely take years, the spacecraft was able to pick out five larger, hotter planets in its first 43 days of observations. (scientificamerican.com)
How hot the planet gets in the long term depends on how sensitive the climate is to CO2 accumulating in the atmosphere. (newscientist.com)
The team's observations confirm a theory from several years ago that this kind of precipitation could occur on massive, hot planets with powerful gravity. (sciencedaily.com)