The formation of our solar system from a singular nebula raises an intriguing question: why did each planet develop with a ...

Leonardo Testi and team investigate the initial conditions for planet formation in this special astronomy focus ...

One of the biggest recent surprises in astronomy is the discovery that most stars like the Sun harbor a planet between the ...

The solar system is 4.54 billion years old, based on rock dating. Gas giants (Jupiter and Saturn) likely formed first. Ice giants (Uranus and Neptune) probably formed next. Rocky planets formed last, ...

The newly identified cluster of Kuiper Belt objects lies about 4 billion miles from the Sun, offering fresh clues about how ...

Plate tectonics give rise to Earth's mountain ranges, earthquakes and the long-term movement of continents, and may even have provided the right conditions for life on Earth. But as far as we know, no ...