Solar nebula
A planetary disc forming in the Orion Nebula.
In cosmogony, the solar nebula is believed to be a gaseous cloud from which Earth's solar system formed.
Definition: solar nebula: The cloud of gas and dust that began to collapse about 5 billion years ago to form the solar system.
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solar nebula The swirling gas surrounding the early Sun during the epoch of solar system formation, also referred to as the primitive solar system.
Solar nebula- the cloud of gas and dust that began to collapse about 5 billion years ago to form the Solar System ...
solar nebula
The cloud of nebulous gas that surrounded the early Sun as it developed through the initial stages of its formation.
Solar Nebula Theory
The theory that the planets formed from the same cloud of gas and dust that formed the sun.
Solar Wind ...
Solar Nebula
the disk of dust and gas of which the Solar System was believed to have formed about 5 billion years ago.
Solar nebula: The immense cloud of gas and particles of floating cosmic dust from which our Solar System (Sun and planets) condensed 4.6 billion years ago.
Solar Nebula - The rotating disk of gas and dust, surrounding the newly formed Sun, from which planets and smaller solar system bodies formed
Solar Wind - The hot plasma that flows outward from the Sun ...
Proto-Solar Nebula
The slowly rotating cloud of gas and dust from which the Solar System formed.
Protostellar Core ...
Solar Nebula
The large cloud of gas from which the Sun and planets were formed 4,600 million years ago.
Space Probe ...
solar nebula - (n.)
cloud of gas and dust out of which a star condenses. The primordial gas and dust cloud from which the sun and planets condensed.
solar (stellar) wind - (n.) ...
Solar nebula
In cosmogony, the nebular hypothesis is the most widely accepted model explaining the formation and evolution of the Solar System. It was first proposed in 1734 by Emanuel Swedenborg....
as a group of planetesimal
Planetesimal ...
Pre-solar nebula forms and begins to collapse. Sun begins to form.[25]
1 Ã- 105-5 Ã- 107 years
Sun is a T Tauri protostar.[16] ...
When the solar nebula stopped collapsing it began cooling, though the core forming the Sun remained hot. This meant that the outer parts of the solar nebula cooled off more than the inner parts closer to the hot proto-Sun.
Astronomy: Solar nebula, Sunspot
People: Giovanni Cassini
Lists: List of mathematical topics
Referenced By ...
You have a solar nebula sitting out there that will start collapsing down to make the Sun and some other stuff. We don't want it to form in any general way, do we?
Formation of the solar nebula
Differentiation into inner and outer planets
Later stages of planetary accretion
Formation of the outer planets and their moons
The small bodies
Formation of ring systems
Solution to the angular momentum puzzle ...
A relatively cool solar nebula at distances this far from the Sun is in agreement with most current theoretical calculations of the formation of the Sun.
The fragmentation and gravitational collapse of an interstellar cloud of gas and dust, triggered perhaps by nearby supernova explosions, may have led to the formation of a primordial solar nebula.
solar nebula The large cloud of gas and dust from which the Sun and planets condensed 4.6 billion years ago.
Indeed, sometime after the tenuous gas of the Solar nebula began collapsing into the proto-Sun within its host molecular cloud, ...
The asteroid belt formed from the primordial solar nebula as a group of planetesimals—the smaller precursors of the planets.
The conventional model for solar system formation, called the solar nebula hypothesis, holds that the solar nebula cooled from T 2000 K with an initially uniform solar composition.
Except for the lightest elements (e.g., H, He), chondrites have the same elemental composition as the original solar nebula because they come from asteroids that never melted or underwent differentiation.
Scientists believe that comets are the debris left from the solar nebula which condensed to form the Sun and planets in our solar system. Most comets are thought to originate in a huge cloud called the Oort Cloud.
They typically have orbits of low eccentricity and inclination, suggesting that their orbits have not changed significantly since they condensed out of the solar nebula.
Resonance KBOs inhabit one of the mean motion resonances with Neptune.
The original atmosphere may have been similar to the composition of the solar nebula and close to the present composition of the Gas Giant planets, though this depends on the details of how the planets condensed from the solar nebula.
Some of them, however, became differentiated; in other words, after they formed from primitive material in the solar nebula, ...
There were three principal theories: co-accretion which asserted that the Moon and the Earth formed at the same time from the Solar Nebula; fission which asserted that the Moon split off of the Earth; ...
The Earth only rotates because of leftover momentum from the solar nebula. Each molecule in the cloud had its own momentum, and as they came together, their combined momentum added up and was conserved(see the theory of conservation of momentum).
A Dictionary of Earth Sciences entry for solar nebula
The Oxford Companion to the Earth entry for solar system
The Oxford Companion to the Earth entry for solar system abundances of the chemical elements ...
Gerard Kuiper in 1951 argued that the rotating disk of dust and gas ("solar nebula") from which the planets condensed probably did not end abruptly with the relatively large mass of Neptune.
One of the small bodies that formed from the solar nebula and eventually grew into proto-planets.
population I
Stars rich in atoms heavier than helium. Nearly always relatively young stars found in the disk of the galaxy.
Scientists believe the solar wind is almost identical in composition to the primeval solar nebula, the cloud from which the Sun and planets condensed 4.5 billion years ago.
Their reasoning works as follows: they described Jupiter's formation in three phases, 1) the accretion of Jupiter's core, 2) a rapid accumulation of gas from the solar nebula from which the stars and planets formed, and 3) a slower accretion of gas ...
As the region that would become the Solar System, known as the pre-solar nebula, collapsed, conservation of angular momentum made it rotate faster. The centre, where most of the mass collected, became increasingly hotter than the surrounding disc.
6 billion years ago as the primordial solar nebula of dust and gas began to coalesce around the infant Sun. Within the first billion years or so, the planets formed and life began to emerge on Earth - and perhaps elsewhere.
These are considered to be the oldest materials in the solar system, with a composition reflecting that of the primitive solar nebula.
In the most popular theory, icy planetesimals in the primitive solar nebula that wandered close to Uranus or Neptune but not close enough to be captured by them were flung to great distances from the Sun, ...
Currently, there are several theories on the origin of Titan's atmosphere, including accretion of gas from the solar nebula, and outgassing of atmospheric constituents from the interior.
Meteorites are bits of rock that are captured by a planet's gravity and pulled to the surface. This meteorite is of a type named and is thought to have formed at the same time as the planets in the solar nebula, about 4.55 billion years ago.
Chondrules show evidence that they were formed at about the same time as the planets - it has been suggested that they formed in the Solar nebula by impact between high-velocity grains.
While the centre of the Sun has been modified by nuclear reactions, researchers believe that the surface, where the solar wind originates, has preserved the composition of the original solar nebula from which the planets were formed.
When the planets were forming out of the same cloud of gas and dust as the Sun, the temperatures in the warm inner regions of the primordial solar nebula were so high that iron-rich minerals were just about the only ones that could condense into ...
 See also: Solar, Nebula, Planet, Solar System, Sun
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