Scientists have long puzzled over how gas planets like Jupiter and Saturn got to be so big -- now they think pebbles may be the answer.
You don't get to meet your double every day, but Jupiter and the sun share the same galaxy as their very own doppelgangers.
The scars of the solar system's violent past remain and they are just becoming visible as NASA's New Horizons mission races toward dwarf planet Pluto for a close encounter on July 14.
Venus is looking hot. And it looks like lava might be causing it.
The stellar runts of the galaxy probably aren't so great for nurturing Earth-like worlds, say scientists running new simulations of the formation of planets around a variety of stars.
Having already discerned the dwarf planet has distinct surface features, NASA's New Horizons mission has now spotted not just Pluto's largest moons, but the smallest natural satellites too.
New research suggests that the frozen cores of 'mini-Neptunes' could be transformed into habitable worlds with a little help from their red dwarf hosts.
Heavy metal ferroelectric "snow" may cover Venus' highest mountain peaks, boosting the alien nature of Earth's weird 'twin.' Continue reading →
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