Probably solid core
Craters, volcanos (dead), erosion features
160-280 K ...
nucleus - the solid core of the comet, it is mostly ice and gas with a small amount of dust and other solids;
coma - a dense cloud of water, carbon dioxide, and other gases spewed off by the evaporating nucleus as the comet nears the Sun; ...
Does Jupiter Have a Solid Core?
Symbol for Jupiter
How Did Jupiter Get its Name?
Will Jupiter Become a Star?
What is Jupiter Made Of?
How Far is Jupiter From Earth?
How Long is a Year on Jupiter?
How Far is Jupiter from the Sun?
Current models for Jupiter's origin suggest instead that a solid core of about 10 Earth masses formed first as a result of the accretion of icy planetesimals.
The interior of Jupiter is made up of a solid core of material similar to that of the Earth with a diameter of about 24,000 km. Surrounding this, with a diameter of about 100,000 km, is a metallic mixture of hydrogen and helium.
Jupiter, on the other hand, may well be fluid throughout, although it could have a small solid core (say up to 15 times the mass of Earth!) of heavier elements such as iron and silicon extending out to perhaps 15% of its radius.
A neutron star's anatomy is very simple, and it has three main layers: a solid core, a "liquid" mantle, and a thin, solid crust.
Like Jupiter and Saturn, Neptune is one of the 'gas giant' planets, composed of a deep atmosphere around a liquid surface and sometimes a solid core.
The boundary between brown dwarfs and big gas planets is fuzzy, though gas planets are thought to form from solid cores accreting interplanetary nebula material, and therefore, ...
A: Gaseous planets are large, low-density planets (called gas giants) - they are made of gases and liquids and may or may not have a solid core.
Planets are made up mostly of rock or gas, with a small, solid core. In our solar system, the inner planets - Mercury, Venus, Earth, and Mars - are the rocky objects, and most of the outer planets - Jupiter, Saturn, Uranus, ...
A strange newfound planet as massive as Saturn appears to have the largest solid core known, providing an important clue to how some giant planets might form and setting off a controversy over how it formed.
We believe there is a solid crust of heavy nuclei, which is about 1 km thick. Below it is a layer of neutrons in liquid state. There may be a solid core, but we are not sure.
Uranus and Neptune are not strictly gas giants similar to Jupiter and Saturn, but are rather ice giants, meaning they have a larger solid core and are also made of ices.
and theoretical support in recent years, and understanding the high pressure and temperature behaviour of carbon is essential to predicting their evolution and structure. Current theories speculate that Neptune and Uranus have solid cores surrounded ...
However, each may have a small solid core as large as three to 20 Earth masses at their center.
It took its first photograph of Tempel 1 from 40 million miles away in April 2005. Then, while still 20 million miles out in June 2005, Deep Impact snapped an image of the comet's solid core for the first time.
The Jovian planets are thus referred to as the "gas giants" because gas is what they are mostly made of, although some or all of them probably have small solid cores. All have significant planetary magnetic fields, rings, and lots of satellites.
High-temperature silicates (e.g., olivine) formed near the protosun and were ejected, perhaps by strong bipolar jets, to the outer parts of the solar system. Recent data indicate that comets probably have porosities of ~75% and perhaps no solid core.
After about a quater of a second the core is solid neutrons and can be contracted no more the layers that were moving downward as fast as 15% of the spped of light bounce off the now solid core.
 See also: Earth, Planet, Solar, Orbit, Sun
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