Sentences with phrase «rocky core»

They applied the model to the icy bodies around our solar system to show how radiation emitted from rocky cores could break up water molecules and support hydrogen - eating microbes.

The ocean is several tens of kilometers deep and surrounds a large rocky core.

A stiff rocky core would not flex enough to generate the heat necessary to melt the ice or explain the jets.

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

The ocean is several tens of kilometres deep and surrounds a large rocky core.

Many theorists believe that the gas giants began with rocky cores with masses equal to about 10 Earths, giving them enough gravity to gobble up their gas shells.

«Some future extraterrestrials visiting our solar system will be able to look at the naked rocky core of what was once an ice moon.»

They modelled more complex bodies than have been tried before: rather than just a homogeneous ball, they included more realistic objects with a hard, rocky core surrounded by an icy mantle.

But in many instances, the simulations show, even planets starting with rocky cores as little as 1.5 Earth's mass may trap and hold atmospheres containing between 100 and 1000 times the amount of hydrogen found in the water in Earth's oceans — thick, dense envelopes exerting pressures so hellish that life on the planets» surfaces might be almost impossible.

«Or, if gas giant planets like KELT - 9b possess solid rocky cores as some theories suggest, the planet may be boiled down to a barren rock, like Mercury,» said Keivan Stassun, the Vanderbilt astrophysicist who co-directed the study, in a statement.

This represents the stage at which the planet's solid rocky core begins to melt, creating a molten material that sloshes around in Mercury's mantle before erupting onto the surface.

But will the Earth's rocky core survive the red giant phase and continue orbiting the white dwarf?»

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.

Combined with its mass of 8.57 Earths, that size suggests the planet has a dense rocky core, surrounded by a 3000 - kilometre - thick envelope of nearly pure water.

The collision stripped the differentiated body, leaving only a rapidly rotating rocky core with a thin vineer of remaining water ice in place.

There are two layers - an external icy layer of 30 - 40 km, and an internal rocky core made up of silicates.»

Astrobiologists theorize that, like ancient Earth, life may have emerged around hydrothermal vents located around the moon's submerged rocky core.

Or, if gas giant planets like KELT - 9b possess solid rocky cores as some theories suggest, the planet may be boiled down to a barren rock, like Mercury.»

Europa, meanwhile, appears to be entirely covered by an ocean, sandwiched between a rocky core and a thin ice crust.

Researchers have found a host of Earth - like planets, and are trying to understand what conditions might be like at the surface of a planet with a rocky core and a thick atmosphere.

They found that Enceladus has a rocky core and an icy crust.

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.

They're like small Neptunes but with huge amounts of liquid water around a rocky core.»

Jupiter is thought to have a rocky core with the mass of 10 Earths that helped it accumulate its gas shroud.

At high southern latitudes, a regional water ocean is shown sandwiched between an icy outer shell and a low density, rocky core.

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

Give me a bunch of Vestas, and I can make a dry Earth with a rocky core.

These heavier elements make up the dust from which planets» rocky cores are thought to coalesce.

It could be produced by water reacting with iron, or similar reactions baking out primitive organic molecules trapped in the rocky core.

New calculations suggest that Jupiter's rocky core is dissolving like an antacid tablet plopped in water.

He speculates that even larger planets around other stars might have lost their rocky cores entirely.

Observations from NASA's Dawn spacecraft showed that Ceres has a rocky core and may once have had an ocean that has since evaporated, says UCLA planetary scientist Edward Young.

If there's gas around and the bodies get large enough, perhaps something on the order of 10 Earth masses or so, then you can start pulling some gas in on top of your rocky core and make something that looks like a gas giant planet, like Jupiter.

(Jupiter, with its rocky core, has a density of 1.326 g / cm ³.)

According to this study, Enceladus is made up successively of a rocky core with a radius of 185 km, and an internal ocean approximately 45 km deep, isolated from the surface by an ice shell with a mean thickness of around 20 km, except at the south pole where it is thought to be less than 5 km thick.

On the outside they are covered by a thick layer of ice, and underneath this there is an ocean surrounding a rocky core.

«It was previously thought that the oceans in these satellites are in direct contact with the rocky core and a chemical reaction took place between them.

The team believes a shallow global ocean, perhaps only a mile deep, lies between Enceladus» rocky core and its 30 - mile - thick icy crust.

For example, the physical and chemical conditions inside the planet can be little more than guessed at, and even the mass of its rocky core is uncertain by at least 50 per cent.

«Scientists have been debating whether this planet has an atmosphere like Earth and Venus, or just a rocky core and no atmosphere, like Mercury.

But even in the cold of space, these wayward worlds could stay warm, thanks to the decay of radioactive elements in their rocky cores.

Coming as close as 5000 kilometers to the 140,000 - kilometer - diameter gas ball, Juno and it's gravity - gauging system should measure the mass of any rocky core at the center of Jupiter.

This violent «stripping» occurs in planets that are made up of a rocky core with a gaseous outer layer.

McKinnon has one idea: If the Cassini spacecraft orbiting Saturn could pin down the nature of Titan's interior, researchers would know whether it formed hot in violent collisions — which would have produced a rocky core — or it formed cold through the quiet agglomeration of primordial debris.

After its ice - rich veneer was stripped away in large chunks, its rocky core disappeared beneath the saturnian clouds.

Although most are made of ice on top of a rocky core, these worlds carry evidence of processes remarkably like those on the terrestrial planets.

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.

That could indicate that the planet is a sort of mini-Neptune — a rocky core sheathed in ice and gas — or a terrestrial world that spewed out a hydrogen atmosphere from molten rock.

This stretches and squeezes the moon's rocky core, producing heat by friction.

At that distance, dust moves so slowly that by the time it had snowballed into a rocky core, the star would already have blown away most of the gas in the disc around it.