Hard and fast details about our solar system’s beginnings are extraordinarily difficult to come by. But a research team using new measurements of pristine magnetic fields within two extremely rare ...

The Orion Nebula, which our solar system may have resembled some 4 billion years ago. Image: NASA, ESA, M. Robberto (Space Telescope Science Institute/ESA) and the Hubble Space Telescope Orion ...

Helium-3, a rare isotope of helium gas, is leaking out of Earth's core, a new study reports. Because almost all helium-3 is from the Big Bang, the gas leak adds evidence that Earth formed inside a ...

When our solar system formed, Mars formed earlier than Earth, and its composition gives clues about early steps in planet formation. A new UC Davis study overturns previous ideas about how rocky ...

THE hypothesis of Kant and Laplace that the solar system originated by a gradual process from the contraction of a rotating nebula has become more and more improbable as the theory of such a process ...

THE object of the present treatise is to establish in a modified form the nebular theory of Laplace, by the introduction of some original views which have long occupied the attention of the author.

A new study of an old meteorite contradicts current thinking about how rocky planets like the Earth and Mars acquire volatile elements such as hydrogen, carbon, oxygen, nitrogen and noble gases as ...