Starship Asterisk*

Most high resolution deep field galaxy images comparable to this show up a menagerie of more distant galaxies. But I could only find a few few dim distant spiral candidates. Have these more distant been editted out? Is this an artefact of Andromed covering such an expanse? Or are we looking in the d...

Will the outgassing increasingly make the comet spin and as it shrinks into rubble help it take on a spherical shape? Related to this is there any particular reason why we have seen at least two of these rubble residues take on a near Octahedral shape instead of one of the other polyhedrons? Might w...

Probably been said before but this taxonomy manages to omit most of the really interesting naked eye fuzzy objects, depending on sky darkness - 4 galaxies (LMC, SMC, Andromeda, Triangulum), 7 (caldwell) + 10 (messier) fuzzy globular clusters brighter than magnitude 7, a number of fuzzy naked eye neb...

It may not be that the oblateness of many stars is sufficient to be measured. But if a useful relationship could be derived then spectra from space telescopes (Gaia?) might provide a means of estimating the oblateness of fast spinning stars (would Gaia be able to provide measurements of oblateness ...

"I think it probably wouldn't work too well because in fact, stars are not very good blackbodies. That's because the photons they emit are produced over a range of their outer regions, and there is a temperature gradient across that emission range. So their spectrum already consists of a super...

"I think it probably wouldn't work too well because in fact, stars are not very good blackbodies. That's because the photons they emit are produced over a range of their outer regions, and there is a temperature gradient across that emission range. So their spectrum already consists of a superp...

The link from M21 goes to this site https://www.universetoday.com/31935/messier-21/ which discusses rapidly spinning Be stars of which Achernar is an extreme example. As a result of this spin the star is reportedly greatly flattened and as a result its surface varies in temperature. I wondered how t...