New simulations suggest that the planets' orbits will destabilize well before the Sun expands into its red giant phase.

The post The Solar System Has a New Life Expectancy, and It’s a Billion Times Shorter appeared first on Sky & Telescope.

"Rogue" Neptune-size worlds might not roam the galaxy totally on their own, just very far away from their parent stars.

The post "Rogue" Neptunes Are Detached But Not Alone appeared first on Sky & Telescope.