In a small telescope, 61 Cygni is a lovely, wide pair of yellow-orange points, spectral types
K5 and K7, currently separated by 31".
From the effective temperatures we obtain spectral types
F0 & K2, which are close to the estimates of Svechnikov & Kuznetsova, (3) F0 & G7IV.
Some spectral types
of Supergiant stars were unexpectedly constant.
Eyes with different spectral types
of cone cells can distinguish different colors.
For those who remember spectral types
by the rhyme "Oh Be A Fine Girl, Kiss Me", or even the extended "Right Now Sweetie", will realise that the L-type occurs nowhere.
The workshops are held every 10 years, and this latest addressed such unanswered questions as the chemical evolution of the different spectral types
of white dwarfs, and the excitation of pulsations.
Beyond this, we will use fainter stars and their NIR photometry, drawn from DENIS and 2MASS, if cross-identifications provide reliable spectral types
A retina with at least ten spectral types
of photoreceptors in a mantis shrimp.
corresponds to temperature, and Russell drew his 1914 diagram with an ordinary series of spectral types
that we now know has temperature decreasing toward the right.
Given the range of possible spectral types
this star could, on the face of it, be almost any of the low-amplitude variable stars on the upper main sequence (see Degroote et al.
Other articles survey the current state of research in topics that include astrobiology, sungrazing comets, digital image reconstruction, new spectral types
L and T, high-velocity white dwarfs and galactic structure, standard photometric systems, mega-masers and galaxies, and galactic winds.
Five of the sky's 20 brightest stars have spectral types
between B0 and B3--hotter than Rigel or Regulus.