Astronomers have discovered a mini-Neptune with an atmosphere that does not contain water or hydrogen, contradicting previous assumptions about these types of planets. Some research has suggested that mini-Neptunes could have conditions suitable for life, with possibilities including liquid water oceans or steamy atmospheres. The characteristics of mini-Neptunes are still being studied, with some findings indicating that water may be hidden deep inside these planets, while others propose that they could be super-Earths with bloated atmospheres.