Showing posts with label NASA. Show all posts
Showing posts with label NASA. Show all posts

Friday, April 26, 2013

“Kinds” of evolution 1,2,3 a summary and extension





We have seen that the origin of the elements following the Big Bang origin of the universe is neither a great mystery nor unsupported by direct scientific observation. There is still much to be learned, but we can dispense with the lie that they are without clear and obvious evidence. The energy released in the Big Bang, regardless of source, cooled and this resulted in the formation of neutrons from a quark, and gluon storm under tremendous heat and pressure. The continued cooling due to cosmic expansion provided conditions where neutrons decayed to protons, electrons, and neutrinos. Protons found electrons becoming hydrogen. Accelerated protons found each other becoming helium. Neutrons continued to add themselves forming the isotopes of deuterium, and helium 3, and 4. Traces of lithium were made, but the Big Bang nucleosynthesis process was blocked at beryllium-8 due to its nearly instant self destruction back into helium.

Gravity came to be the most important force in the next step, the formation of stars. The earliest stars were mostly huge things, millions of times larger than our sun. They quickly (in universal time scales) generated the elemental nuclei up to iron’s 26 protons via the “slow” process . Again the process was blocked, but this time by the stability of the iron nucleus. That very stability, ironically, lead to the greatest explosions observed in the universe today, the super nova. Those events generated the rest of the heavy elements to uranium (and maybe higher). Once there were ample amounts of heavy elements, other more interesting things do start to appear - planets. A bright new discovery is that the early universe neutron stars generated super heavy elements. "Element abundance patterns in stars indicate fission of nuclei heavier than uranium" Science, 7 Dec 2023, Vol 382, Issue 6675, 1177-1180 https://www.science.org/doi/10.1126/science.adf1341

2007 NASA’s Spitzer space telescope detected silica (sand) in the supernova remnant Cassiopeia A. The cyan dot just off center is the star's remnant.


This is, step by step, observed and verified scientific fact. Naturally creationists have denied it could ever be true. Any gap is clutched like a drowning man grabs at straws. One gap in our observations of ordinary r-process nucleosynthesis at atomic number 79, Gold, has just been filled. The collision of neutron stars, which are the remnants of massive star novas, provides the exact energy conditions for Gold synthesis. This has just been directly observed, and reported in, Gold is extra special fun: Neutron star collisions are a “goldmine” of heavy elements, study finds.

 And some new 2023 observations 

"Heavy element production in a compact object merger observed by JWST"
https://www.nasa.gov/missions/webb/nasas-webb-makes-first-detection-of-heavy-element-from-star-merger/

 

In the creationist’s freakish version of reality, planets just spring into existence by magic. For many decades, all leading creationist “thinkers” insisted that there were no planets other than those around the Earth. Henry Morris, founder of the Institute for Creation Research, was still trying to deny that science could discover extra-solar planets, or even the origin of the moon in the late 1990s. See for example his nonsense published as “The Stardust Trail.”

"As far as distant stars and galaxies are concerned, there is no evidence either in science or Scripture, that any of them have planets." Henry Morris, The Biblical Basis for Modern Science (Grand Rapids: Bier Book House, 1984) p. 244.

The late Duane Gish claimed that the non-existence of extra-solar planets was important to Christian faith. He wrote, “Our faith is based on the certainty of eyewitness accounts, not the uncertainty of the wobble of stars.”


Science knows, and every American should know that extra-solar planets are common. Science knows, and every American should know that the nebular hypothesis as proposed by Immanuel Kant in 1755 has been obsolete for over a century. Its modern replacement owes a great deal to Kant, but has the major advantage of making predictive statements regarding the physical structures we can directly observe in our solar system, and around distant stars. ( The Wikipedia article on this is excellent, and I'll just refer readers there).

This does not slow down the creationists who continue to deny reality, for example: as recently as 2011, "NASA Data Derail Nebular Hypothesis" by Brian Thomas of the ICR, "The nebular hypothesis is dead, and no other naturalistic origins scenario has fared any better. Clearly, the solar system is not a product of natural forces but of supernatural."

Two features of the modern nebular hypothesis are that there will be a circumstellar disk which will have remnants following the formation of inner planets. This is called the Kuiper Belt. It was recently determined by astronomers that Pluto was better classified as a Kuiper Belt object. There should also be an even more distant, spherical distribution of matter around a star called the Oort Cloud. These two concentrations of matter also have the interesting feature of explaining the origin, and persistence of comets. And this is why creationists hate and deny their very existence. Young Earth Creationists insist that the rather short cometary lives (hundreds to thousands to millions of years) somehow "proves" that the Earth is merely 6,000 years old. This is why we can read such stupidity from creationists as, “This imaginary cloud is called the "Oort Cloud," named after the astronomer who proposed it. The problem is that there is no observational evidence such a cloud exists at all.” “The Stardust Trail” Henry Morris.

Unfortunately for creationists, we have all the data we need. Even better, every feature of the modern Nebular Hypothesis: circumstellar disks, Kuiper Belts, and Oort Clouds, have been directly observed around other stars. And, how do we know that our solar system was built from earlier generations of stars? The most obvious way is the analysis of extra-solar dust grains still found today. There have been hundreds of scientific publications on these observations in just the last few years. Just use the Google; "extrasolar dust" is a good one. Then, "extrasolar disks" will reveal space telescope images of planet formation recorded for over a decade.



Wednesday, April 17, 2013

Frame 7

The next string of posts are unavoidably text heavy. I skipped Frame 6 because it was just boring, as you can see for yourself.





The creationist claims there are "six kinds of evolution," and the "professor" kindly outlines them;

1. Cosmic Evolution - Big Bang makes hydrogen
2. Chemical Evolution - higher elements evolve
3. Planetary Evolution, i.e. evolution of stars and planets from gas
4. Organic Evolution - life from rocks
5. Macroevolution - changes between kinds of plants and animals
6. Microevolution - changes within kinds

Big Daddy's big lie, "Only the last one has been observed and can be called science. The first five are believed by faith." Of course, none of the ways these "kinds" are characterized by Jack Chick make much sense scientifically.

Creationists like to exploit the different meanings of the word “evolution” as seen in this “list of kinds of evolution.” And to be fair, there are scientists who use the word “evolution” to mean any process of transformation. Recently, Harvard University has used this same over extended sense of “evolution” to organize a brief science curriculum covering topics from the origin of the universe, to the origin of new biological species today. I find it amusing that they are unknowingly following a pattern laid down first by creationists. But, it does make it much easier to debunk the main lie told about these “kinds of evolution,” in Frame 7. Of course this is that there is a lack of evidence for these events to have occurred, and be still occurring today.

1. Cosmic Evolution - Big Bang makes hydrogen

The first of the creationist “kinds” of evolution was “Cosmic Evolution." This is properly known as Cosmology. The Belgian priest, Monsignor Georges Henri Joseph Édouard Lemaître, was an accomplished astronomer and professor of physics. He proposed in 1927 that the Universe was expanding based on Einstein’s General Relativity, and then four years later that the Universe had had a discrete beginning. The phrase "Big Bang" was coined by English astronomer and physicist Fred Hoyle who was a critic of the idea. The direct observations by Edwin Hubble at the Mt. Wilson observatory lead to the discovery in 1929 that that Lemaître was in fact correct. So, the expanding universe and Big Bang origin of the universe has had direct observational support for over 80 years.

The data do not stop there. One implication of the Big Bang theory was that there must be a fading background “glow” which should be everywhere in the universe. Calculations by Ralph Alpher, Robert Herman, and George Gamow in 1948 indicated that this radiation should be in the microwave frequencies generated from an energy of about 3 degrees Kelvin. This was detected accidentally in 1965 by Arno Penzias and Robert Wilson of Bell Labs. A team of researchers at nearby Princeton University led by Robert Dicke realized what Penzias and Wilson had detected. The NASA Wilkinson Microwave Anisotropy Probe (WMAP) (launched in 2001) has completed a map of tiny temperature variations in this cosmic background which corresponds with the formation of the first galaxies in the universe. The project also refined the age of the universe to 13.7 ± 0.13 billion years.




The European Space Agency and NASA collaborated on the Planck CMB mission. They have just released their first results. The improved sensitivity of the Planck satellite adjusted the age of the Universe to 13.8 billion years.

The third test of the Big Bang origin of the universe is the distribution, and abundances of atoms of different elements. I’ll leave this to a later post on Big Daddy's "kinds of evolution" 2 and 3. The trigger of the Big Bang is still under study. Two recent books summarizing our current understanding are;

Krauss, Lawrence
2012 “A Universe From Nothing” New York: Free Press

Susskind, Leonard
2005 "The Cosmic Landscape: String Theory and the Illusion of Intelligent Design" New York: Little and Brown Publishers


So, for the next part on the origin of larger atoms, see :  "Kinds" of evolution, Part Deux: Cosmic nucleosynthesis of elements