Talk:G-type main-sequence star

From Wikipedia, the free encyclopedia
Jump to: navigation, search
WikiProject Astronomy / Astronomical objects  (Rated Start-class, Mid-importance)
WikiProject icon G-type main-sequence star is within the scope of WikiProject Astronomy, which collaborates on articles related to Astronomy on Wikipedia.
Start-Class article Start  This article has been rated as Start-Class on the project's quality scale.
 Mid  This article has been rated as Mid-importance on the project's importance scale.
Taskforce icon
This article is supported by WikiProject Astronomical objects, which collaborates on articles related to astronomical objects.
 

Different Example[edit]

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[edit]

Does this sentence refer to the sun?

"yellow dwarf"[edit]

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)

Is this article needed?[edit]

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.)—RJH (talk) 14:55, 23 September 2009 (UTC)

Yellow dwarf actually white?[edit]

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)

"Often imprecisely called..."[edit]

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)