Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. A rare form of helium may have flooded Earth’s core during the ...

A team of researchers recently reported that a little over 4 pounds of helium-3 leak out of Earth every year, an indication that our planet formed in a solar nebula. Helium-3 is a very ancient isotope ...

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 ...

Astronomers estimate that at the time the Solar system formed, its proto-planetary disk contained the equivalent of about twenty Jupiter-masses of gas and dust. This so-called "minimum mass solar ...

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 ...