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29 votes
Accepted

Why did the dust between the planets disappear during the birth of the solar system?

Dust happens in two ways. "Primordial dust" just condenses out of the protostellar material in the disc providing it gets cool enough and dense enough. "Second generation" dust is ...
ProfRob's user avatar
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7 votes
Accepted

How much mass does the Sun gain from the Poynting-Robertson effect?

The Sun does not accrete any mass as a result of the Poynting-Robertson (P-R) effect. The P-R effect only drags in relatively small dust particles and these are easily evaporated/sublimated when they ...
ProfRob's user avatar
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3 votes

Meteors arriving to a planet's atmosphere?

The assumption of an atmosphere with nearly no wind is difficult to find or create - but let's assume we find such body. Gravity works on solid particles, and assuming that they are denser than the ...
planetmaker's user avatar
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3 votes

Meteors arriving to a planet's atmosphere?

Yes, the material (dust and gas) stays in the atmosphere, at least for a while. Larger particles of dust will tend to fall, but are strongly affected by turbulence in the lower atmosphere. Water and ...
James K's user avatar
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3 votes

Mathematical modeling of the influence of components of the interstellar medium on the distortion of the wavefront of the observed object

As far as I know, interstellar scintillation has only been observed in the radio. However, Habibi et al. present a model in A&A 552, A93 (2013) that suggests it should be detectable in the optical....
John Doty's user avatar
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2 votes

The Poynting Robertson Effect

The Poynting Robertson effect (or P-R drag), as explained in the wikipedia Essentially there is a small, Special Relativistic aberration effect whereby the light received from the Sun by an orbiting ...
ProfRob's user avatar
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2 votes

How much mass does the Sun gain from the Poynting-Robertson effect?

Even if the Sun gains some mass due to the Poynting-Robertson effect, it most certainly is outweighed by its fusion processes. According to this article: Is the Sun Shrinking?, the Sun looses 4.289x10^...
Astrovis's user avatar
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1 vote

Color index B-V of the dimming Betelgeuse

The changes in Jupiter's B-V index are not compatible with the expected properties of circumstellar dust. Circumstellar disks cause Infrared excess, which would cause reddening, not a shortening of ...
Astrovis's user avatar
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