Jupiter passes 100 moons while Saturn reaches 285 as astronomers confirm 15 new discoveries.

The two largest planets in our solar system, Jupiter and Saturn, also have the largest satellite systems, or the most moons.

There’s no mistaking Jupiter in the sky these Pottsville winter evenings, rising in the southeast as evening twilight ends. In fact you should be able to easily see it long before twilight fades.

A simulation-based study reveals that Jupiter does this with its stronger magnetic fields.