Determining Earth's bulk composition is difficult because so little of the planet is directly accessible. As a result, most estimates derive from a comparison of Earth rocks with the planet's ...

The Earth formed relatively quickly from the cloud of dust and gas around the sun, trapping water and gases in the planet’s mantle, according to research published Dec. 5 in the journal Nature. Apart ...

Earth's building blocks were more eclectic than once thought, according to a new study suggesting our planet formed from collisions of many different types of meteorites. Our planet is thought to ...

Where did the materials that make up the Earth and moon come from—and when did they arrive? Most scientific models contend the Earth formed gradually by addition from an assortment of moon- to ...

Scientists can use modern rocks, moon samples and meteorites to figure out when and how the Earth and moon formed, and what they might once have looked like.

Earth's building blocks were more eclectic than once thought, according to a new study suggesting our planet formed from collisions of many different types of meteorites. Our planet is thought to ...

Impacts of numerous Moon- to Mars-sized planetary embryos on the growing Earth released sufficient energy to induce melting and core formation within the Earth 10,11. As metal segregation is ...

New research sheds light on the earliest days of the earth's formation and potentially calls into question some earlier assumptions in planetary science about the early years of rocky planets ...

The rocks that came together to form Earth might have carried more water than we thought Our planet may have been born wet. When and how Earth got its water is an open question in planetary ...