Questions tagged [classification]
Questions regarding grouping objects together based on one or more shared property.
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Does "spectral type" and "stellar classification" refer to the same thing?
Should the tags stellar-classification and spectral-type be merged? has been asked in meta two weeks ago. It requires some careful consideration but so far no response has been forthcoming, so I'm ...
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Can Jupiter's nightside be classified as spectral type Y?
As far as I am aware, the latest spectral types that have been assigned are around Y2, for objects like WISE 0855-0714 that have temperatures around 250 K or so. I've also seen several directly-imaged ...
user24157
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How are the numerical stellar subclassifications determined?
From Wikipedia:
The spectral classes O through M, as well as other more specialized classes discussed later, are subdivided by Arabic numerals (0–9), where 0 denotes the hottest stars of a given ...
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Synthesising types of galaxies using various stellar spectra
I have asked this on Physics Stack Exchange but Astronomy is probably more appropriate. I have been given the task of synthesising an elliptical galaxy, a starburst galaxy and a spiral galaxy (...
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Why does spectral class and U-V colour correlate slightly differently for main sequence, giant and supergiant stars?
In this diagram the $x$-axis is spectral type for stars and the $y$-axis is B-V colour.
Taking Series 1 as the Main Sequence, Series 2 as Giants and Series 3 as Super-giants. Why the spectral class ...
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Are falling evaporating bodies (FEBs) and exocomets the same thing? How does one know they're falling and evaporating?
Looking for a (short) list of comets with heliocentric escape velocity I stumbled upon Wikipedia's exocoments which like exoplanets, are bound to other stars. I should have been looking for "...
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How are Y-dwarf spectral subtypes defined?
It is often stated that the spectral subtype indicates the relative position between spectral types, e.g. G5 being halfway from the start of spectral type G to the beginning of spectral type F.
Given ...
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