In this video segment adapted from NOVA, learn how the four rocky planets of the inner solar system formed.

They noted that any larger asteroid formed very early on in the solar system would have been heated to high temperatures by the decay of large amounts of aluminum-26, a radioactive nuclide ...

Over four billion years ago, the solar system was a wild and dangerous place. Swirling clouds of dust and gas slowly turned ...

Scientists have found how our solar system was formed in the wind-blown bubbles around a giant, long-dead star.

“The discovery of this [system] shows that the planet system – the solar system formation – requires maybe a different approach to understanding how they form,” Ge said.

Scientists have discovered that meteorites on Earth, containing tiny molten droplets called chondrules, reveal the formation of Jupiter 4.6 billion years ago.

“The gas giants must have formed by 4 million years after the formation of the solar system,” Weiss says.

The dwarf planet formed a bit differently from the rest of the solar system.

Astronomers have discovered a brand new type of planet outside our solar system that, even in its infancy, is already bigger ...