Toggle sidebar Toggle sidebar

Helio

Joined: Jun 1, 2020

Last seen: Today at 4:48 PM Viewing forum list

Latest activity Postings Featured content About Trophies

- Helio reacted to billslugg's post in the thread SETI tests new alien-hunting strategy, but TRAPPIST-1 planets remain silent with Like.
  
  We need radio telescopes at opposite ends of the Solar System, kept in place by optical means, the angular resolution would be incredible.
  
  Tuesday at 5:25 PM
- Helio replied to the thread SETI tests new alien-hunting strategy, but TRAPPIST-1 planets remain silent.
  
  But the use of arrays (interferometry) really helps.
  
  Tuesday at 5:03 PM
- Helio reacted to Unclear Engineer's post in the thread NASA at a crossroads:' Budget woes, aging infrastructure and hard choices ahead with Like.
  
  This is really no surprise, given the U.S. national debt of $34 trillion and rising fast. Just the interest payments on that debt...
  
  Tuesday at 1:16 PM
- 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.
  
  Tuesday at 1:00 PM
- 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...
  
  Tuesday at 12:59 PM
- 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...
  
  Tuesday at 12:54 PM
- 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...
  
  Tuesday at 12:42 PM
- 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...
  
  Tuesday at 12:35 PM
- 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...
  
  Tuesday at 12:22 PM
- 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...
  
  Oct 18, 2024
- 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...
  
  Oct 17, 2024
- 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...
  
  Oct 17, 2024
- 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?
  
  Oct 16, 2024
- 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.
  
  Oct 15, 2024
- 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...
  
  Oct 15, 2024
Show older items
Loading…
Loading…
Loading…
Loading…