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National Academy of Sciences report: An Astrobiology Strategy for the Search for Life in the Universe
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Mr. Kevvy Send message Joined: 15 May 99 Posts: 3797 Credit: 1,114,826,392 RAC: 3,319 |
NASA Should Expand the Search for Life in the Universe and Make Astrobiology an Integral Part of its Missions, Says New Report Oct. 10, 2018 As it was "congressionally mandated" I'm hoping we will see plenty of new NASA initiatives... perhaps even some for a SETI project (or even this one!... AstroPulse is already an NSF project.) |
tullio Send message Joined: 9 Apr 04 Posts: 8797 Credit: 2,930,782 RAC: 1 |
Bondi, Gold, Hoyle said much the same thing many years ago (the steady state universe). Then came the accidental discovery of the cosmic microwave background, which was seen as the proof of the Big Bang (a term coined by Hoyle as a derision). Let us see if the new theories have some experimental evidence. Tullio A theory unifying general relativity and quantum field theory is the Sacred Grail of today's physics. One of the attempts is the quantum loop gravity. I don't think a theory inspired by David Bohm has made any progress in this direction. |
William Rothamel Send message Joined: 25 Oct 06 Posts: 3756 Credit: 1,999,735 RAC: 4 |
I think that all we need to de-bunk this notion is to establish without a doubt that galaxies are, in fact., rushing away from us and one another. On a related notion of proof of various theories: Then someone needs to state why they think that the acceleration is increasing as what we see at the fringe is what happened 13 billion years ago when gravity may have had not enough time to slow the Big Bang. These far-out galaxies would be expected to be moving faster than the close=in galaxies since they would have the accelerating force of the Big Bang unfettered by gravity acting over a longer time than the ones we can see close in. |
William Rothamel Send message Joined: 25 Oct 06 Posts: 3756 Credit: 1,999,735 RAC: 4 |
We are finite but un-bounded. There was no time before the big bang; time started then. If we are expanding, the universe, itself, is creating more space. --Just as expanding in a 2-dimensional world (think basketball) would be to simply blow it up with more air like a balloon. If there were no 3rd dimension in this 2-dimensional analogy then there is notihng that it can expand into. There is no position North of North in a 2 dimension surface such as our globe. |
moomin Send message Joined: 21 Oct 17 Posts: 6204 Credit: 38,420 RAC: 0 |
Looks like NASA already has started. https://www.nasa.gov/feature/will-we-know-life-when-we-see-it-nasa-led-group-takes-stock-of-the-science NASA’s James Webb Space Telescope will characterize the atmospheres of some of the first small, rocky planets. Other observatories— such as the Giant Magellan Telescope and the Extremely Large Telescope, both in Chile— are planning to carry sophisticated instruments capable of detecting the first biosignatures on faraway worlds. https://nexss.info/about/about-nexss |
moomin Send message Joined: 21 Oct 17 Posts: 6204 Credit: 38,420 RAC: 0 |
I should define time as it might help a visiting ET.Why would ET be helped by how we on Earth measure time and length? I'm sure that ET have other units than we have for that but can navigate to us anyway. Just as we can travel to other places in space regardless if there would ETs on an exoplanet using other units. However the physical definition of time is more important. https://en.wikipedia.org/wiki/Time#Physical_definition Not how you divide it. https://en.wikipedia.org/wiki/Time_in_physics#Time_in_cosmology |
moomin Send message Joined: 21 Oct 17 Posts: 6204 Credit: 38,420 RAC: 0 |
Just like like the definition of a metre. It was created after the French Revolution in the 1790s, and was then defined as 1/10,000,000 of the distance from the North Pole to the Equator along the Paris meridian. Now the metre is the length of the path travelled by light in vacuum during a time interval of 1/299792458 second. Very close to to the originally metre actually and chosed by purpose. To ET this is of course totally unknown. |
moomin Send message Joined: 21 Oct 17 Posts: 6204 Credit: 38,420 RAC: 0 |
SETI institute has already proposed an alternative way to search for ET:) Sending Google Into Space to Search for Alien Life https://www.youtube.com/watch?v=OYd8QiJTi6s |
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