Talk:G-type main-sequence star

G-type stars actually range in color from white, for more luminous types like the Sun
Sigh ... the sun isn't white, it's yellow. — Preceding unsigned comment added by 82.68.94.86 (talk) 15:04, 8 April 2018 (UTC)

Actually the temperature of the sun dictates that it's surface should be white... Inky Bendy (talk) 20:23, 25 February 2021 (UTC)

Different Example
The article says that betelgeuse is a red giant, while it is actually a supergiant, a much larger form of red giant. It is impossible for a yellow dwarf to become the size of betelgeuse. I think that should be edited to have a different example.

I changed the example to Aldebaran, which really is a red giant.--Syd Henderson 03:29, 15 September 2006 (UTC)

At least one yellow dwarf is known to have planets
Does this sentence refer to the sun?

"yellow dwarf"
The Sun emits white light, no? The term "yellow dwarf" should be better explained.--Pharos 03:54, 20 September 2007 (UTC)


 * One could argue that the Sun emits green light, but we have evolved to see that particular green as being neutral. --Doradus (talk) 20:38, 28 March 2009 (UTC)

... The peak is in the yellow/green. It's irrelevant what we have evolved to see. — Preceding unsigned comment added by 82.68.94.86 (talk) 15:09, 8 April 2018 (UTC)

Is this article needed?
Calling the Sun "small" is a bit strange! And the sentence incorrectly implies that dwarfs and giants are classified on the basis mass, rather than radius. This article needs work -- is it even needed? Timb66 (talk) 22:31, 12 June 2009 (UTC)
 * I removed the "small" and just left the mass range. The article could probably also use some information on internal convection and surface activity of G V stars, as well as the particulars of the spectrum. I.e. how do you identify a G V star based on it's spectral lines? (See B-type main sequence star for example.)&mdash;RJH (talk) 14:55, 23 September 2009 (UTC)

Yellow dwarf actually white?
From the article: "Our own Sun is in fact white, but appears yellow through the Earth's atmosphere due to Rayleigh scattering." If it is white, why is the Sun's image shown here as yellow, the image described as a "yellow-toned B/W photo"?

For consistency, for credibility, that image ought to show the Sun as white. Dratman (talk) 04:00, 16 April 2013 (UTC)

The sun isn't white. It's yellow. It's emission spectrum is hardly uniform.

"Often imprecisely called..."
I object to the statement that G-V stars are often imprecisely called yellow dwarfs. I request that it be changed to state that G-V stars are informally known as yellow dwarfs, which they are. This is more correct, as G-V stars DO peak in the green-yellow portion of the spectrum. Human eyes evolved to see this particular color as a neutral white. Stating it is imprecise because humans do not perceive it as yellow is being anthropocentric. Riley0143 (talk) 18:04, 17 July 2013 (UTC)

... Indeed. It's absurd to claim the sun is white. It doesn't have a uniform spectrum. — Preceding unsigned comment added by 82.68.94.86 (talk) 15:07, 8 April 2018 (UTC)


 * Agreed. If it's so "imprecise" why does NASA prefer the term? Viriditas (talk) 02:20, 16 February 2021 (UTC)

Off-color picture
The picture is a yellow-tinted picture of the sun. It does state that the color is wrong, but why not just show an accurately-colored picture of the sun? There's a very similar, but correctly colored, picture on the Sun article. — DanielLC 19:26, 12 March 2015 (UTC)

What are the Absolute magnitudes of the various classes of G type stars? G0-G9? The article for Class A stars has that listed.24.237.74.7 (talk) 02:52, 12 February 2016 (UTC)

Note 1 is Inconsistent with the chart "Properties of G type main sequence stars"
Note 1 states that the Sun is of type G5-V, among other reasons, because those type stars have exactly 1.00 Solar masses. However according to the chart itself, type G5-V has 0.98 Solar masses, and instead shows that it is type G4-V that has exactly 1.00 Solar Masses, not type G5-V. Obviously the Sun weighs exactly as much as the Sun; so either the chart or Note 1, is in error. — Preceding unsigned comment added by 2601:985:C100:8540:A970:DA24:C53A:9F06 (talk) 01:28, 23 April 2018 (UTC)


 * This is because spectral classifications and luminosity do not always align. Our star does not fit neatly into the category because it is hotter. Also, the mass has nothing to do with the classification of stars on the spectral type.Tpaclatee (talk) 02:48, 27 February 2021 (UTC)

Corrected statement about the Sun's colour, with cites
The previous version of the sentence suggested that the sun always looks yellow in our skies. But in fact it usually looks white and the spectrum peaks in the blue and green. It only looks yellow, orange or red in special conditions such as sunrise, sunset or with dust in the atmosphere.

Corrected it to "The Sun is in fact white, and its spectrum peaks in blue and green light, but it can often appear yellow, orange or red through Earth's atmosphere due to atmospheric Rayleigh scattering, especially at sunrise and sunset." with cites.

Our idea that it is yellow or orange is a cultural convention. In Japan they have the convention similarly that the sun is red and children draw red suns in their drawings.

Robert Walker (talk) 05:23, 6 November 2017 (UTC)

...not so. The spectrum has an objective peak. — Preceding unsigned comment added by 82.68.94.86 (talk) 15:08, 8 April 2018 (UTC)