SunriseÃÂ & x28;orÃÂ sunup& x29; is the moment when the upper rim of theÃÂ SunÃÂ appears on theÃÂ horizonÃÂ in theÃÂ morning.ÃÂ The term can also refer to the entire process of the solar disk crossing the horizon and its accompanyingÃÂ atmospheric effects.