Neptune

Attention is turning to Triton, Neptune's largest moon, and the question of whether it could support life. Triton is a frozen world with geysers erupting nitrogen ice and a likely subsurface ocean, making it one of the more intriguing candidates for habitability in the outer solar system. Discussion of its potential comes as interest in icy ocean moons like Europa and Enceladus continues to grow.

New modelling work reports that in nine out of ten simulations, the solar system's giant planets — Jupiter, Saturn, Uranus and Neptune — break apart from their current stable arrangement. The finding reignites debate about the long-term stability of planetary orbits and whether the solar system's apparent calm is a temporary state rather than a permanent one.