Sentences with phrase «from rocky cores»

In the icy bodies around our solar system, radiation emitted from rocky cores could break up water molecules and support hydrogen - eating microbes.

Not exact matches

Unlike in other states where governors were intimately involved with Common Core implementation, Cuomo has largely stayed out of the process, letting state education commissioner John King and the state Board of Regents take the heat from parents and teachers over the rocky rollout.

«Common Core is an issue about which there has been a lot of dialogue,» Cuomo spokeswoman Melissa DeRosa said in a statement Tuesday that both affirms the standards and distances the administration from its rocky rollout.

The chemicals would have originated in the rocky core of Enceladus, so to reach a plume they must have leached from the core via liquid water.

The debris probably was dredged up from the bottom of the moon's ocean by water percolating through the rocky core, and then...

New research from The University of Texas at Austin adds evidence to a theory that claims the metallic cores of rocky planets like Earth were formed when molten metal trapped between grains of silicate rock percolated to the center of the planet during its early formation.

Standard geology texts assume that the metallic core is virtually isolated from the rocky mantle, with only a thin interface called the D» layer between them.

One controversial theory posits that giant planets might not need rocky cores if they form directly from unstable whorls of gas in the nebula around a young star.

Earth and Mercury are both rocky planets with iron cores, but Mercury's interior differs from Earth's in a way that explains why the planet has such a bizarre magnetic field, UCLA planetary physicists and colleagues report.

Indeed, the present - day theory of planet formation — the build up of a rocky planet's core by the accretion of many small bodies — is very different from Jeans's.

The presence of this rock at a site indicates either that material has pushed up through Earth's crust from the mantle (a silicate rocky shell between the crust and the core with an average thickness of 2,886 km and depths ranging from 30 km to almost 3,000 km below the crust) or that a celestial body (a comet, meteor or meteorite) fell there.

Surprising findings from some of the oldest known meteorites suggest that our solar system was once chock - full of miniature planets, complete with metallic cores and rocky crusts.

Lagrange says the finding is consistent with a planet formation model known as core accretion in which the planet starts out as a rocky core that gravitationally acquires more matter from the surrounding swarm of dust and gas.

At the moment, the team's favored idea is akin to the second solution above: that large bodies of solid metal slowly dropped from the rocky mantle and into the core to lower the nucleation barrier.

In this scenario, planets could form mainly from gas, without first forming a rocky core.

While Saturn is mostly a gigantic shroud of liquid hydrogen and liquid helium, it contains a rocky core — about 18 times the size of Earth, which responds to tidal forces from all of Saturn's major moons by bulging.

In the past, the decay of radioactive elements and the leftover heat from Titan's formation might have melted nearly all the body's ice — so the ocean might have extended all the way down to the rocky core.

Analysis of data also shows that Ceres has a water - ice mantle surrounding a rocky core, and that there may still be at least pockets of liquid water beneath the surface, raising the prospect of potential habitability for microorganisms, as seemingly unlikely as that may sound for a world so far from the Sun.

Some planets are so near their star that they are losing mass too rapidly to have been planets for very long.14 Besides, their rocky cores would have melted before the planet's evolution could begin.15 Others are too far from their star and the dust near the star needed to grow a planet.

Furthermore, by knowing the mass of a planet from radial velocity measurements and the radius of a planet based on how much starlight it blocked, it is a simple calculation to determine a planet's density, which can tell astronomers whether that planet is rocky or gaseous in nature, or whether it has a small core and a thick atmosphere, or whether it has a large core covered in deep oceans.

The authors point out that Cassini's gravity measurements suggest Enceladus» rocky core is quite porous, which would allow water from the ocean to percolate into the interior.

Building on past observations of the white dwarf called SDSSJ1043 +0855 (the dead core of a star that originally was a few times the mass of the Sun), which has been known to be gobbling up rocky material in its orbit for almost a decade, the team used Keck Observatory's HIRES instrument fitted to the 10 - meter Keck I telescope as well as data from the Hubble Space Telescope to measure and characterize the material being accreted by the star.

It would appear that these chemicals originated in the rocky core of the moon and were leached from the core via liquid water.

In 2010, model simulations of rocky super-Earths between two and 10 Earth - masses indicated that high pressures could keep their cores solid instead of molten, which would prevent a protective magnetic field from forming protecting developing surface life from stellar radiation.

Unlike winds on the inner rocky planets like Earth, which are powered primarily by sunlight, winds on the gas giants are also fed by heat escaping from their deep cores, although the strength of this interior heat is a mere fraction of the sunlight falling on Earth.

The core accretion model describes how the rocky inner planets formed from Sol's protoplanetary disk.

Colliding at speeds up to 22,000 miles per hour (36,000 kilometers per hour), such a collision may have stripped most of the rocky mantle from the protoplanet that became Mercury with its iron - rich core, while a Mars - size protoplanet struck the early Earth off - center and created a spray of mostly mantle material that later accreted to form the Moon.

Below the ocean may be a few hundred miles (or kilometers) of a heavier form of ice that may exist under higher pressures on above a rocky core roughly 1,800 to 2,100 miles (3,000 to 3,400 km (more from Cassini news release; Lorenz et al, Science, March 21, 2008; Richard A. Kerr, ScienceNOW Daily News, March 20, 2008; David Shiga, New Scientist, March 20, 2008; and Charles Q. Choi and Andrea Thompson, Space.com/MSNBC, March 20, 2008).

Everywhere Governor Cuomo goes these days, he's dogged by questions from reporters about what's widely perceived as a rocky start up of New York State's adoption of the new national Common Core standards for school children.

Good news from Austlii, which has had a rocky year since some of its core funding was cut off.