Faith is not "without evidence" argument

[Doc Dutch]

Hiding from us?

All of them? While it's reasonable that a very advanced civilization may have a "Prime Directive" custom, it'd be hard to stop two similarly advanced civilizations from recognizing each other. The Earth has been blasting radio and tv signals into space for 120 years at the speed of light.

Given the physics of the Universe, and 2 + 2 = 4 both on Earth and Tralfamadore, then they'd have similar technology for communications and, like us, go through stages of advancement where they'd be tossing out radio signals willy-nilly.

https://www.cbc.ca/news/science/exol...arth-1.6078841
Astronomers estimate 29 potentially habitable exoplanets may have received signals from Earth
7 star systems are within 100 light-years of Earth

he Milky Way is a big place. There are an estimated 200 billion stars, most of them with one or more planets. As a result, in the search for extraterrestrial life, it's like looking for a needle in a haystack.

However, a new study has released a list of potentially habitable planets that may have already received a signal from Earth, may be receiving them now, or will within 5,000 years.

The study, published in Nature, used data collected by the European Space Agency's (ESA) Gaia space telescope, which is mapping our galaxy in unprecedented 3D.

In our search for exoplanets, or planets orbiting other stars, one of the most popular methods is the transit method, where the light of a star dips ever-so-slightly (maybe close to 1 per cent), which indicates a planet has crossed in front of — or transited — the star.

However, this method requires the planet to be in our line of sight. It's like someone holding a pea in front of a giant light bulb; if it were held anywhere above or below the light bulb, we wouldn't notice the slight dip in brightness.

The authors of the new study found that, over the past 5,000 years, roughly 1,715 nearby stars would have been in a position to see Earth in this transit method, and of those, 29 potentially habitable planets around those stars could have also received human-made radio transmissions, which began roughly 100 years ago. That is, if they know to look for radio signals....

[AProudLefty]

All of them? While it's reasonable that a very advanced civilization may have a "Prime Directive" custom, it'd be hard to stop two similarly advanced civilizations from recognizing each other. The Earth has been blasting radio and tv signals into space for 120 years at the speed of light.

Given the physics of the Universe, and 2 + 2 = 4 both on Earth and Tralfamadore, then they'd have similar technology for communications and, like us, go through stages of advancement where they'd be tossing out radio signals willy-nilly.

https://www.cbc.ca/news/science/exol...arth-1.6078841
Astronomers estimate 29 potentially habitable exoplanets may have received signals from Earth
7 star systems are within 100 light-years of Earth

We might be sending the signals the wrong way. And looking for them the wrong way.

[IBDaMann]

Second, I have already answered this question.
I have already answered this question too.
I have already answered this question.
The answers I've already given you.

If you won't answer my questions, I'm not going to understand your position beyond the apparent physics violations. If you don't like the questions, I won't ask.

[IBDaMann]

Earth seems to be finely tuned to support life. The universe is deadly to life, but Earth has an established geophysical, chemical, orbital characteristic protecting the planet from the lethality of the cosmos.

What percentage of the universe is the earth?

[Doc Dutch]

We might be sending the signals the wrong way. And looking for them the wrong way.

Certainly a possibility, but if the math and physics are same, which is the way it appears, then it's reasonable that the tech would be similar.

Another possibility is a non-technical advanced civilization of tree-huggers who never invented radios or ventured into space.

One of my favorite movies lines is from 1968's Planet of the Apes where the three astronauts, after crossing a desert, discover primitive humans. Taylor (Charlton Heston) says "If this is the best they've got around here, in six months we'll be running this planet"... then they meet the apes.

If technological humans ever encounter a civilization of tree-huggers, the odds are "in six months we'll be running this planet." LOL

[IBDaMann]

You're dumb.

Nope. I speak well. You must be deaf.

[Doc Dutch]

Nope. I speak well. You must be deaf.

Mantra 41 Idiocracy

Mantra 1a.

Mantra 4a.

One of the "miscellaneous" documents on that site is Into the Night's mantra list.

[Into the Night]

Agreed. It's proof that he truly believes these are his "friends".

The only friends Sybil has is your socks, Sock.

[Into the Night]

If you won't answer my questions, I'm not going to understand your position beyond the apparent physics violations. If you don't like the questions, I won't ask.

I already answered your questions. There is no physics violations. I already explained why.

[Into the Night]

Certainly a possibility, but if the math and physics are same, which is the way it appears, then it's reasonable that the tech would be similar.

Another possibility is a non-technical advanced civilization of tree-huggers who never invented radios or ventured into space.

One of my favorite movies lines is from 1968's Planet of the Apes where the three astronauts, after crossing a desert, discover primitive humans. Taylor (Charlton Heston) says "If this is the best they've got around here, in six months we'll be running this planet"... then they meet the apes.

If technological humans ever encounter a civilization of tree-huggers, the odds are "in six months we'll be running this planet." LOL

The Sock is believing movies are real life again.

[Doc Dutch]

The only friends Sybil has is your socks, Sock.

Mantra 43 Fecal incontinence due to sex-related weakened anal sphincter

Mantra 1a.

Mantra 4a.

One of the "miscellaneous" documents on that site is Into the Night's mantra list.

[Doc Dutch]

The Sock is believing movies are real life again.

Mantra 45 Rectal-Cranial Inversion Syndrome (RCIS)

Mantra 1a.

Mantra 4a.

One of the "miscellaneous" documents on that site is Into the Night's mantra list.

[Cypress]

What percentage of the universe ?

Bulverism
Argument from ignorance fallacy

hint: energy and matter are not interchangeable

The Theory of the Big Bang is just a nonscientific theory

Wave-Particle duality is classical physics.

There is no such thing as an accelerating reference frame!!

There is no such thing as an 'accelerating frame of reference'.

Darwin's theory of evolution is not science

Axioms are not postulates!

The Nazis were also socialists.

Bulverism fallacy. Bigotry.

Bulverism. Bigotry. False Authority.

bigotry, bulverism

[Cypress]

New study darkens hope for Earth-like planets

Most planets can't host plant life.

A new study examines if exoplanets get enough stellar radiation to support photosynthesis. Many planets within the habitable zones of stars do not receive enough energy to support plant life. Earth-like planets are probably very rare.

Since 1961, astrobiologists and others interested in finding extraterrestrial life have used the Drake equation to speculate on the possible number of technologically advanced alien civilizations in the Milky Way. By multiplying factors like the number of new stars in the galaxy per year, how many planets those stars have, the number of planets suited to life, and how long intelligent civilizations emit radio waves, one can get an estimate of how many other intelligent species are out there right now.

The problem is that the equation is almost entirely speculative because many of the factors have unknown values. But every once in a while, new information helps to narrow down the range of reasonable values to plug in.

Bad news for E.T. enthusiasts: a new study published in Monthly Notices of the Royal Astronomical Society offers a further narrowing of those values. By examining the conditions needed for photosynthesis, the authors propose that biospheres suitable for life might be rarer than we thought.

Let there be (a little more) light: The study’s authors looked at what conditions are needed for the biochemical process that makes most life on Earth possible, oxygenic photosynthesis. By combining carbon dioxide with water and light, species capable of oxygenic photosynthesis produce sugar and oxygen. The latter is released as a waste product.

The authors, like many before them, conjecture that photosynthesis is common throughout the galaxy on account of how much stellar radiation there is to collect, the (comparative) simplicity of the process, and the abundance of the other input elements.

As it turns out, good real estate is hard to come by in the Milky Way.

Stars that burn at half the heat of the sun do not provide enough energy for a rich biosphere to ever arise. Red dwarf stars, which are small, numerous, and burn at about a third of the sun’s temperature, were even worse. They couldn’t provide the energy needed for much photosynthesis at all.




Full article
https://bigthink.com/hard-science/ex...hotosynthesis/

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[Frank Apisa]

The null hypothesis is premised on finding no evidence.

Not sure why you consider "life is rare" to be the "null hypothesis." "Life is rare" is as much an alternate hypothesis to "life is abundant" as "life is abundant" is to "life is rare."

We simply do not know if life is rare or abundant...and probably no scientist or could adequately describe what "rare" or "abundant" is on a scale such as "our galaxy" or "the universe."

Lack of evidence is sufficient to make educated preliminary guesses.

And there is a lack of evidence that life is rare...so...???

Many reputable PhD level astronomers and astrobiologists currently believe life is rare in the galaxy, based on a range of observed factors. So I really don't think it is fair to call it absurd as an educated guess.

Think about that, Cypress! We do not even know if carbon based life needing the ingredients of what is popularly known as the Goldilocks Zone...is the only kind of life. Any truly reputable scientist would probably leave the answer at, "We do not know."

But things could change as our technology improves and we get more evidence

That is for sure. And even if the essentials of life in Goldilocks Zones is abundant, if it takes the direction human life took in evolution, maybe life in most systems terminates itself at some point in its technological evolution.