When Jupiter was young, about 4.5 billion years ago, a protoplanet with 10 times the mass of Earth crashed head-on ... still recovering from that ancient crash. "It could still take many, many ...

YR4, previously dreaded to crash into Earth, is no longer a risk after fresh information altered its path, but it has a 2% possibility of hitting the Moon.

Jupiter’s skies can glow with lights more intense than anything on Earth. Its polar auroras shine when charged particles crash into its upper atmosphere, creating bursts of heat and energy.