Helio's latest activity
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Helio replied to the thread SETI tests new alien-hunting strategy, but TRAPPIST-1 planets remain silent.And we are close to having far better equipment in finding those signs, which will allow great focus for SETI on these exos. -
Helio reacted to billslugg's post in the thread SETI tests new alien-hunting strategy, but TRAPPIST-1 planets remain silent with
Like.
Planets from far away would first see that Earth had fluorocarbons in its atmosphere, thus would know intelligent life existed here... -
Helio replied to the thread The Pluto problem: Is it time to rethink our definition of a planet?.Using mass would be okay, perhaps, if it could be determined. Astronomers normally can’t determine mass but they can approximate...
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Helio replied to the thread SETI tests new alien-hunting strategy, but TRAPPIST-1 planets remain silent.Yep. The first use of a laser for communication with someone (or object, IIRC) was in 2012. That laser is in my office. :) NASA soon...
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Helio reacted to Mike Everman's post in the thread SETI tests new alien-hunting strategy, but TRAPPIST-1 planets remain silent with Like.
So the premise is that the folks in the Trappist system are either multi-planetary (more advanced than us, talking planet to planet), or...
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Helio replied to the thread The Pluto problem: Is it time to rethink our definition of a planet?.“Eight is enough.” Physics can step in and clarify the gray areas. Jean-Luc Margot produced a paper applying physics to orbit clearing...
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Helio replied to the thread SETI tests new alien-hunting strategy, but TRAPPIST-1 planets remain silent.The Trappist system has an M8V type star as the host. Red dwarfs are known for temper tantrums (large flares, etc.). The HZ here is...
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Helio replied to the thread Question Not when or where or how but why did the Big Bang happen..“Why?” is the main question asked in philosophy and religion. Science asks “how” questions. In earlier centuries science sought...
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Helio reacted to Meteoric Marmot's post in the thread Pollution from rocket launches and burning satellites could cause the next environmental emergency with Like.
Alumina is Al2O3 and its optical properties depend on which crystal structure it forms. One crystal structure is clear and forms...
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Helio replied to the thread Pollution from rocket launches and burning satellites could cause the next environmental emergency.Agreed. Isn’t aluminum oxide white, thus offering some greater reflection?
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Helio replied to the thread Hopes dim for another bright October comet after Tsuchinshan-ATLAS.Tonight's image with iPhone. I give my visual of it only a 60% chance that I saw it.
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Helio reacted to billslugg's post in the thread Hopes dim for another bright October comet after Tsuchinshan-ATLAS with Like.
Yes, skyglow is narrow, could easily be filtered out. Arequipa had 500,000 people but all streetlights were sodium vapor. Mercury...
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Helio reacted to billslugg's post in the thread Hopes dim for another bright October comet after Tsuchinshan-ATLAS with Like.
Very nice image. You have some real clear skies. In 1986, I was excited to be at 10,000 feet in the Andes because I figured the skies...
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Helio replied to the thread Hopes dim for another bright October comet after Tsuchinshan-ATLAS.Thanks. I just notice that Venus is barely on the left edge (about 1/2 way up). Perhaps this will help others for tonight's viewing...
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Helio replied to the thread Hopes dim for another bright October comet after Tsuchinshan-ATLAS.Here's one with my iPhone. I first found the comet using the iPhone, which sees such things better than the eye, of course.
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