questions on seti and astropulse

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merle van osdol

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Message 1548475 - Posted: 27 Jul 2014, 14:38:36 UTC

Considering MB v7, how far out in light years is v7 able to reach as far as ETI detection? Same question for astropulse? I know my questions may be very naïve but that's the best I can do until I learn. Hopefully here.
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Message 1548805 - Posted: 28 Jul 2014, 6:24:12 UTC - in response to Message 1548475.  

Hello probably about 250 million light years the size of our Galaxy any father than that is pointless even E.T would have troubble travelling to another Galaxy . Any signal out there will travel to the edge of the Cosmos weather or not E.T could pick it up , your guess is as good as any i spose as it would be very , very , very , very , very weak
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Message 1548974 - Posted: 28 Jul 2014, 14:27:03 UTC - in response to Message 1548475.  

At 1000 light years we could most likely only pick up an intentional, high powered, focused beam.

Take note that there are not that many stars within 1000 lightyears and that (as far as I know) we ourselves are not sending any such beacon of existence.
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Message 1549010 - Posted: 28 Jul 2014, 15:44:20 UTC - in response to Message 1548998.  

There are perhaps a million stars within 1000 light years, not all of them main sequence.

I consider that to be not many in terms of the estimated 300 billion stars in our own Galaxy.

We are more likely to catch spurious signals from planets around stars of, say, 100 light years out of which there are perhaps 10,000: again many are not main sequence, non binary which may be requirements for intelligent life.
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merle van osdol

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Message 1549062 - Posted: 28 Jul 2014, 17:20:27 UTC - in response to Message 1549010.  
Last modified: 28 Jul 2014, 17:46:10 UTC

Thanks for this input from all. I didn't know that we still talk of main sequence stars? I remember that terminology from the '50's. General question: What are those green stars by some persons names?
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Message 1549210 - Posted: 28 Jul 2014, 22:17:37 UTC - in response to Message 1549062.  

Thanks for this input from all. I didn't know that we still talk of main sequence stars? I remember that terminology from the '50's. General question: What are those green stars by some persons names?

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Message 1549546 - Posted: 29 Jul 2014, 20:21:28 UTC - in response to Message 1549210.  

Thanks Gary. Does main sequence exclude pulsars, quasars, binary systems?
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Message 1549574 - Posted: 29 Jul 2014, 21:02:57 UTC
Last modified: 29 Jul 2014, 21:04:09 UTC

I'm sure those questions can't be answered by one man only but I do hope it includes... (anyhow)!:)
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Message 1549578 - Posted: 29 Jul 2014, 21:08:12 UTC

http://en.wikipedia.org/wiki/Main_sequence

Oh
Be
A
Fine
Girl
Kiss
Me
Right
Now
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merle van osdol

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Message 1549579 - Posted: 29 Jul 2014, 21:08:55 UTC - in response to Message 1549574.  

Julie,
What does main sequence stars mean to you, if anything?
Thanks
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Message 1549788 - Posted: 30 Jul 2014, 11:28:56 UTC - in response to Message 1549579.  

Julie,
What does main sequence stars mean to you, if anything?
Thanks



Hi Merle:) Main sequence stars are stars that are fusing hydrogen atoms to form helium atoms in their cores. This to produce energy of course, which is the basis for all life in the Universe. Our Sun is a G-type main-sequence star. You can see our Sun's position in the diagram below.


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merle van osdol

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Message 1549819 - Posted: 30 Jul 2014, 13:46:13 UTC - in response to Message 1549788.  

Thanks Julie. You look so sad. Don't cry.
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Message 1549854 - Posted: 30 Jul 2014, 14:26:11 UTC - in response to Message 1549788.  
Last modified: 30 Jul 2014, 14:26:35 UTC

Those must be surface temperatures. Roughly 10,000 degrees Fahrenheit on our Sun.
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Message 1549855 - Posted: 30 Jul 2014, 14:26:32 UTC - in response to Message 1549819.  

Thanks Julie. You look so sad. Don't cry.


I have been asked before to change my avatar, but I won't. Maybe in a few years:)
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merle van osdol

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Message 1549966 - Posted: 30 Jul 2014, 17:10:58 UTC - in response to Message 1549855.  

Why change? It is very cute,creative and unique; especially with the kitty.

I remember about the main sequence from my first book on stars that I loved, back around '50, but I didn't realize it was still in use after all the discoveries that have been made since then. I'm not so sure that we can exclude white dwarfs from being void of any life in their neighborhood.
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Message 1549972 - Posted: 30 Jul 2014, 17:18:07 UTC - in response to Message 1549966.  

Why change? It is very cute,creative and unique; especially with the kitty.

I remember about the main sequence from my first book on stars that I loved, back around '50, but I didn't realize it was still in use after all the discoveries that have been made since then. I'm not so sure that we can exclude white dwarfs from being void of any life in their neighborhood.



The diagram is a basis for any astronomer in the understanding of stars:)
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merle van osdol

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Message 1550703 - Posted: 31 Jul 2014, 23:20:31 UTC

If seti were to find ETI, which app would probably be the best bet for being the big winner - MB or AP?
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Message 1550705 - Posted: 31 Jul 2014, 23:27:34 UTC - in response to Message 1550703.  

We don't know that is why we use both.
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Message boards : SETI@home Science : questions on seti and astropulse


 
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