Dec
16
comment Can antiprotons make stable bounds with halogens?
thanks Sofia -.
Dec
16
comment Can antiprotons make stable bounds with halogens?
right, but with a high $n$ so that their overlap with the matter nuclei is tiny. Also, Rydberg matter seems to hold the atoms from decaying by quantum correlations. But I guess that's a story for another thread.. or question
Dec
16
comment Can antiprotons make stable bounds with halogens?
It would be interesting indeed. It is a long shot, but I keep wondering from time to time that antiprotons could make metastable Rydberg atoms with normal matter with some coherent RF pumping of sorts. Who knows
Dec
16
asked Can antiprotons make stable bounds with halogens?
Dec
14
awarded Popular Question
Dec
12
comment Accumulated environmental damage to Hubble main mirror
"To date, since the first shuttle servicing mission’s correction for a significant aberration in the mirror, there has been no measurable degradation." Aberration is associated with low-order Bessel modes of deformation of the lens, and those are associated with plastic strain due to thermal cycling. Those are interesting to know, but is not what I'm interested. My concern is about the microscopic degradation of the mirror surface. Aberration doesn't detect that, only reductions in Strehl ratios and scattering leaking can estimate those, and there is no practical way to measure the latter
Dec
7
asked Interstellar electron velocity distributions
Dec
5
awarded Popular Question
Dec
5
accepted Gravity Assist braking
Dec
4
comment Gravity Assist braking
so basically, aim for the exit orbit with least angular momentum relative to star CoM, and wait for star's gravity to do its job? does that means that the maximum velocity is constrained by the star's escape velocity?
Dec
4
asked Gravity Assist braking
Dec
3
comment Perimeter of $(p,q)$ tiling of the hyperbolic plane
Cool, I just wanted to clarify because Willemien commented on my question and he assumed I meant distances under the underlying hyperbolic metric, wanted to make sure this applied to the Euclidean projection
Dec
3
comment Perimeter of $(p,q)$ tiling of the hyperbolic plane
to make it clear, it seems that this argument applies both for the projected Euclidean metric perimeters and the underlying hyperbolic lengths
Dec
3
comment Perimeter of $(p,q)$ tiling of the hyperbolic plane
Which is why I made the comment of $\pi$ as the total area, to make it clear that I was referring to the lengths of the projected (euclidean) perimeters on the Poincare disc coordinates, not on the underlying hyperbolic plane
Dec
2
comment Perimeter of $(p,q)$ tiling of the hyperbolic plane
because the tilings cover the Poincare disc completely, which has area $\pi$
Nov
28
accepted Perimeter of $(p,q)$ tiling of the hyperbolic plane
Nov
28
revised Perimeter of $(p,q)$ tiling of the hyperbolic plane
added 16 characters in body
Nov
28
asked Perimeter of $(p,q)$ tiling of the hyperbolic plane
Nov
27
awarded Taxonomist
Nov
23
awarded Popular Question
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