Talk:Main sequence
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[edit] Temperatures in table
What part of the star do the temperatures in this table refer to? Surface? Core? Could someone with the appropriate knowledge alter this for clarity? QmunkE 15:47, 10 March 2006 (UTC)
All the temperatures refer to surface temp. Any text-book with the Hertzprung-Russel diagram will tell you that!
[edit] Dwarf?
Could someone explain the reason why stars on this sequence are called "dwarf stars"? The article doesn't explain the origin of the term at all. --LostLeviathan 05:01, 20 March 2006 (UTC)
These stars are hot, dim, and tiny compared to the Sun. They are actually remnants of stars. They are called dwarfs simply because they are very small. There is no real "origin" of the term.
- I disagree with the above (unsigned) argument. I think LostLeviathan was asking about Main Sequence stars being described as dwarfs, and not about White Dwarfs which are hot, dim, tiny, stellar remnants but are not on the main sequence.
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- Stars appear to be described as "dwarf" or "giant" with no "normal" size between the two. I think the most likely explanation (and feel free to correct me on this point if you think I'm wrong here), is that at the time the phrase was first coined around 1910, these were the smallest, dimmest stars of their colour that had been observed. Since then we have discovered white dwarfs, metal-poor sub-dwarfs and other types of small, dim stars.
- Astronaut 16:54, 28 July 2006 (UTC)
- I was going to ask the same thing. Why are main sequence stars also called dwarf stars? This definately needs to be explained in the article. Especially since the table at the end of the article seems to describe stars in their main sequence, yet includes a star or 16 solar radii and over 100 solar masses! I am generally quite knowledgable about astronomical topics, but if this has me confused it's safe to say the vast majority of readers will be as well.
- So someone in the know: why are main sequence stars also called dwarf stars, and just how big a range does this classification have? ie, how big can a star be while still being called a dwarf? Harley peters 19:45, 8 October 2006 (UTC)
[edit] Bet you find this Interesting?
I had a thought the other day. And tried to find this answer to this on Wikipedia and other sources. But as a complete layman became very confused, parsecs/light years ect. This is my thought, we (the human race) have been sending out RF signals of a reasonable strength since 1922, please correct me on this if I have this wrong. Based on this knowledge, I wondered how far and how many star like suns (G class stars) have these RF signals reached by this year, 2007 ? You know where I'm going with this thought, and yes maybe life is not restricted to G class stars, or maybe it is, or maybe only to G2V, and we all known G2V's are capable! Then there's the age of these stars, and then the metallic make up as well. I wish someone with the right knowledge would draw up a list of theses stars. And using the above knowledge. We could then break the list up into the most lightly to the most unlikely places that intelligent life may exist. And that have also received RF signals from us. I believe this list would be helpful to SETI, to reduce their listing down to size, so they can focus on a more broader range of RF signals. As I also believe the RF's they are searching are far too narrow, and I feel a lot of time and money is going to waist at SETI. If anyone can help me with this please do, maybe I've got this wrong as I'm just a layman. But in any case, post me something, its bugging me!
