what is the role of dust particles in the formation of clouds?

Question

on the basis of saturation vapour pressure

Answer 1

1.Dust particles are in a cloud with 1,000M sun of dusty gas, if 1% of the clouds mass in dust grains.
98892E+31/1E-4 = 1.98892E+35 Dust Grains
( 1000 solar masses... 1% of 1000 is 10.

10 solar masses is dust grains. If mass of grain = 10^-4Kg

1 solar mass = 1.98892 × 10^30 kilograms
10 solar mass = 1.98892 × 10^31 kilograms)
2.Cloud condensation nuclei(CCN) also known as cloud seeds are small particles about which cloud droplets form. Water requires a non-gaseous surface to make the transition from a vapour to a liquid.
CCN or cloud seeds can be dust,sea salt spray, soot,
When no CCNs are present, water vapour can be supercooled below 0 °C before droplets form. if there is no CCN, in above freezing temperatures the air would have to be supersaturated to around 400% before the droplets could form.

Answer 2

Cloud condensation nuclei(CCN) also known as cloud seeds are small particles about which cloud droplets form. Water requires a non-gaseous surface to make the transition from a vapour to a liquid.
CCN or cloud seeds can be dust,sea salt spray, soot,
When no CCNs are present, water vapour can be supercooled below 0 °C before droplets form. if there is no CCN, in above freezing temperatures the air would have to be supersaturated to around 400% before the droplets could form.

Answer 3

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Answer 4

dust is composed of particles in space which are a few molecules to 0.1 mm in size. Cosmic dust can be further distinguished by its astronomical location; for example: intergalactic dust, interstellar dust, circumplanetary dust, dust clouds around other stars, and the major interplanetary dust components to our own zodiacal dust complex (seen in visible light as the zodiacal light): Comet dust, asteroidal dust plus some of the less significant contributors: Kuiper belt dust, interstellar dust passing through our solar system, and beta-meteoroids.

Cosmic dust was once solely an annoyance to astronomers, as it obscures objects they wish to observe. When infrared astronomy began, those so-called annoying dust particles were observed to be significant and vital components of astrophysical processes.

For example, the dust can drive the mass loss when a star is nearing the end of its life, play a part in the early stages of star formation, and form planets. In our own solar system, dust plays a major role in the zodiacal light, Saturn's B Ring spokes, the outer diffuse planetary rings at Jupiter, Saturn, Uranus and Neptune, the resonant dust ring at the Earth, and comets.

The study of dust is a many-faceted research topic that brings together different scientific fields: physics (solid-state, electromagnetic theory, surface physics, statistical physics, thermal physics), (fractal mathematics), chemistry (chemical reactions on grain surfaces), meteoritics, as well as every branch of astronomy and astrophysics. These disparate research areas can be linked by the following theme: the cosmic dust particles evolve cyclically; chemically, physically and dynamically. The evolution of dust traces out paths in which the universe recycles material, in processes analogous to the daily recycling steps with which many people are familiar: production, storage, processing, collection, consumption, and discarding. Observations and measurements of cosmic dust in different regions provide an important insight into the universe's recycling processes; in the clouds of the diffuse interstellar medium, in molecular clouds, in the circumstellar dust of young stellar objects, and in planetary systems such as our own solar system, where astronomers consider dust as in its most recycled state. The astronomers accumulate observational ‘snapshots’ of dust at different stages of its life and, over time, form a more complete movie of the universe's complicated recycling steps.

The detection of cosmic dust points to another facet of cosmic dust research: dust acting as photons. Once cosmic dust is detected, the scientific problem to be solved is an inverse problem to determine what processes brought that encoded photon-like object (dust) to the detector. Parameters such the particle's initial motion, material properties, intervening plasma and magnetic field determined the dust particle's arrival at the dust detector. Slightly changing any of these parameters can give significantly different dust dynamical behavior. Therefore one can learn about where that object came from, and what is (in) the intervening medium.