Sentences with phrase «solar nebula»

Indeed, sometime after the tenuous gas of the Solar nebula began collapsing into the proto - Sun within its host molecular cloud, a strong magnetic field developed that was instrumental in transporting rotational energy away from its core region in bi-polar jets of gas so that centrifugal forces created by the nebula's collapse did not grow so much as to halt continuing gravitational contraction.

That these two isotopes from two sources are found consistently in similar ratios suggest that the Solar Nebula was very well mixed or the developing Solar System absorbed a stray cloud of dust that contained both isotopes (Trinquier et al, 2009; and Rachel Courtland, New Scientist, April 16, 2008).

Nor is repeated lightning seen in regions of space comparable to the hypothetical solar nebula.

When it formed from the solar nebula, Venus would have had a much faster, prograde rotation, but calculations show that over billions of years, tidal effects on its dense atmosphere could have slowed down its initial rotation to the value seen today.

Some researchers have suggested a repeating, pulsed heat source, such as lightning bolts, but no consensus has been reached on the feasibility of generating lightning in the solar nebula.141

Of course, the solar nebula that evolutionists imagine would not have produced lightning powerful enough and focused enough to melt trillions upon trillions of pinpoints of rock.

u One of the big problems in the current story on how asteroids evolved is: «How do gas and dust in a hypothetical solar nebula condense into dense boulders (asteroids, planetesimals, and meteoroids)?»

u Leslie W. Looney, John J. Tobin, and Brian D. Fields, «Radioactive Probes of the Supernova - Contaminated Solar Nebula,» The Astrophysical Journal, Vol.

«Studies of comets and asteroids show that the solar nebula that spawned our Sun and planets was rich in water and complex organic compounds,» noted Karin Öberg, an astronomer with the Harvard - Smithsonian Center for Astrophysics in Cambridge, Mass., and lead author on a paper published in the journal Nature.

This finding was expected because meteorites from Vesta have less iron than the solar nebula from which planetary building blocks formed.

Alternatively, Mercury may have formed from the solar nebula before the Sun's energy output had stabilized.

Using first - principles methods, we show that molecular water and a wide - variety of organics found in the solar nebula could have been directly incorporated on to planetary grains, implying a possible endogenous source of life on Earth.

There was no solar system, only a giant, rotating cloud of particles called the solar nebula.

The story begins about 4.57 billion years ago, when the planets of the Solar System started forming from the primordial solar nebula.

In fact, the researchers found that chondrules were most likely created by the collision of such moon - sized planetary embryos: These bodies smashed together with such violent force that they melted a fraction of their material, and shot a molten plume out into the solar nebula.

Comets represent the icy planetesimals that are left over building blocks from the collapse of the solar nebula (Figure 11.2).

He also hopes to explore what happens to chondrules once they are launched into the solar nebula.

«Jupiter is the oldest planet of the solar system, and its solid core formed well before the solar nebula gas dissipated, consistent with the core accretion model for giant planet formation.»

A soil sample from an asteroid can give us clues about the raw materials that made up planets and asteroids in their formative years, and about the state of the inside of a solar nebula around the time of the birth of the planets.

So the conclusion was the gas - giant cores must have formed before dissipation of the solar nebula — the gaseous circumstellar disk surrounding the young sun — which likely occurred between 1 million years and 10 million years after the solar system formed.

Short - duration flash - heating events in the solar nebula prior to the formation of planets in our solar system were responsible for supplying Earth with a presumably ideal amount of carbon for life and evolution.

Without the solar nebula, the growth of the sun and its large gas planets would have slowed or stopped.

Some 4.6 billion years ago, our solar system was just a baby sun engulfed in its solar nebula — a disc - shaped cloud.

Based on the standard models that simulate carbon reactions in the solar nebula where the sun and planets originated, Earth and the other terrestrial planets should have up to 100 times more carbon,» states Prof. Gail.

Measurements of surface chemical composition, either by direct sampling (as has been done on Earth, the moon, and Mars) or through spectroscopic observations, can be used to estimate elemental abundances and the degree of chemical differentiation that occurred as the planets condensed from the solar nebula.

There are many possible sources for the components of Earth's primordial atmosphere, from the so - called solar nebula, a cloud of dust and gas leftover from the sun's formation, to comets and other impactors that may have delivered significant amounts of chemicals to Earth during or after the planet's formation.

These so - called chondrules were formed during short - duration flash - heating events in the solar nebula.

One of these clumps, rotating and collapsing under its own gravitation, formed a flattened spinning disc known as the solar nebula.

«This goes to the core of the question of whether this primitive solar system material was made in the interstellar medium, or whether it was made in the solar nebula later,» says Klaus Pontoppidan of the Space Telescope Science Institute in Maryland.

However, if the planet managed to keep water from the solar nebula before it evaporated away, there's no reason other planets couldn't do the same thing.

That past began 4.56 billion years ago, when the first solids cooled and congealed from the hot gas and dust swirling in the newborn solar nebula.

The reason oxygen isotopes are present in a different pattern is because they are derived from sustained chemical reactions occurring on the surface of the outer solar nebula, rather than from a one - time event.

Generally, science says that our solar system's planets ultimately formed from a huge, ancient cloud of interstellar dust (the solar nebula) in space.

Probably not, because you need a dense dust cloud like the solar nebula to coagulate large bodies» he says.

Science also holds that the solar nebula was homogenous, that is, the same kind of dust everywhere.

This is a more precise figure than previous estimates, which placed the solar nebula's lifetime at somewhere between 1 and 10 million years.

«What's more, the angrites» paleomagnetism constrains the lifetime of our own solar nebula, while astronomical observations obviously measure other faraway solar systems,» Wang adds.

Weiss says that if the solar nebula was around in the first 4 million years of solar system formation, this would give support to the core accretion scenario, which is generally favored among scientists.

Most of this interstellar material contracted at the disk's center to form the sun, and part of the solar nebula's remaining gas and dust condensed to form the planets and the rest of our solar system.

City - size planetesimals — rocky microworlds that clumped together in the solar nebula — smashed into our planet's surface at incredible velocities and seeped down to Earth's iron core, depositing yet more iron.

By studying the magnetic orientations in pristine samples of ancient meteorites that formed 4.563 billion years ago, the team determined that the solar nebula lasted around 3 to 4 million years.

«So even if the solar nebula hadn't disappeared by 4 million years, it was basically on its way out.»

About 4.6 billion years ago, an enormous cloud of hydrogen gas and dust collapsed under its own weight, eventually flattening into a disk called the solar nebula.

«It's predicted that once the magnetic field drops by a factor of 10 - 100 in the inner solar system, which we've now shown, the solar nebula goes away really quickly, within 100,000 years,» Weiss says.

Now scientists from MIT and their colleagues have estimated the lifetime of the solar nebula — a key stage during which much of the solar system evolution took shape.

Now that the scientists have a better idea of how long the solar nebula persisted, they can also narrow in on how giant planets such as Jupiter and Saturn formed.

In the old view, the planets formed in an orderly manner, born from a swirling disk of gas and dust, known as the solar nebula, into stable orbits at their present locations from the sun.

Every piece of the solar nebula had a distinctive composition, determined by its temperature and distance from the sun.

They are truly primordial remnants from the solar nebula, a cloud of gas and dust that birthed the sun and planets.

Read up on solar nebula theory.