The more we learn about the universe the more we gain confidence in the biblically predicted big bang creation model1. In the most recent issue of the Astrophysical Journal, a team of nine South Korean and Chinese astronomers performed a clustering analysis of 1,133,326 galaxies from the Sloan Digital Sky Survey Data Release 12 to achieve the most precisely defined and constrained cosmic creation model to date.2

The galaxies the nine astronomers analyzed spanned distances ranging from 1.9–7.5 billion light-years. Specifically, the nine astronomers established the most detailed and precise constraints to date on the properties of the universe’s cosmic mass density and dark energy density. They did this by applying the Alcock-Paczynski test on their very large sample of galaxies. What follows in the next several paragraphs is a somewhat technical explanation, but the details help establish the big bang implications.

In 1979, astronomers Charles Alcock and Bohdan Paczynski published a paper in Nature in which they developed a technique for measuring the cosmic expansion rate, the nature of dark energy, and the spatial geometry of the universe that was independent of the evolutionary history of galaxies.3 This evolution-free test measured the distances to galaxies by comparing the measured angular sizes of galaxies to their sizes determined by the differences in redshifts from the near sides of the galaxies to the far sides.

The Alcock-Paczynski test was not applied until recently because it requires the telescope instrumentation to measure redshifts to extremely high precision. Such precision redshift measuring capability was not possible until just a few years ago.

The Alcock-Paczynski test works well if there is no preferential alignment of galaxies either along or perpendicular to our line-of-sight. Such preferential alignment can be effectively eliminated with a large enough sample of galaxies and galaxy clusters. However, the motions of galaxies are not purely determined by the cosmic expansion rate. Overlapping a galaxy’s velocity due to the cosmic expansion rate is a much smaller, but not trivial, movement of the galaxy generated by its gravitational interactions with nearby massive galaxies. All Alcock-Paczynski tests inevitably are affected by such peculiar motions of galaxies.

The nine astronomers found a way to minimize the effect of peculiar galaxy motions. They achieved this minimization through a statistical analysis of a very large sample of galaxies spanning both a wide range of redshifts and a wide range of galaxy cluster sizes. The Data Release 12 of the Sloan Digital Sky Survey of galaxies delivered the very large sample of galaxies that they needed. In a previous paper, the team demonstrated how their analysis gave them high-precision cosmological constraints.4 In their most recent paper, the team added an improved methodology that gave them a more accurate and reliable determination of the probable errors in their measurements of the cosmological parameters.

Combining their analysis of the Alcock-Paczynski effect on 1,133,326 galaxies from the Sloan Digital Sky Survey Data Release 12 with data from the Planck and WMAP maps of the cosmic microwave background radiation, the baryon-acoustic oscillations, the type Ia supernovae, and the Cepheid variable stars, the nine astronomers produced the following determinations of the cosmic mass density and the nature of cosmic dark energy:5
Ωm = 0.301 ± 0.008
w0 = -1.042 ± 0.067
wa = -0.07 ± 0.29

Ωm = 0.301 means that 30.1 percent of the total cosmic density is comprised of matter. Since the universe’s geometry measures flat to four places of the decimal, the cosmic dark energy density, ΩΛ = 1.000 – 0.301 = 0.699. If dark energy is entirely explained by the cosmological constant, then w0 exactly = -1.0 and wa (the first derivative of w0, a measure of possible change in w0) exactly = 0. That w0 = -1.042 ± 0.067 and wa = -0.07 ± 0.29 implies that—more strongly than any previous measurement—the accelerated expansion of the universe is driven by the cosmological constant or some other dark energy component that has no evolution.

In the fourth edition of The Creator and the Cosmos that we released last month, I cited the best measurements to date of the cosmic mass density and the cosmic dark energy density. Those measurements were Ωm = 0.2934 ± 0.0107 and ΩΛ = 0.707 ± 0.012.6 Compared to the determinations by the nine astronomers, the measurements are remarkably consistent. This consistency, together with the greater precision of the new determinations, demonstrates that we are fully justified in being increasingly confident in the biblically predicted big bang creation model.

Endnotes
  1. Hugh Ross and John Rea, “Big Bang—The Bible Taught It First,” in Hugh Ross, The Creator and The Cosmos: How the Latest Scientific Discoveries Reveal God, 4th ed. (Covina, CA: RTB Press, 2018), 25–31.
  2. Xiao-Dong Li et al., “Cosmological Constraints from the Redshift Dependence of the Alcock-Paczynski Effect: Dynamical Dark Energy,” Astrophysical Journal 856 (April 1, 2018): id. 88, doi:10.3847/1538-4357/aab42e.
  3. Charles Alcock and Bohdan Paczynski, “An Evolution Free Test for Non-Zero Cosmological Constant,” Nature 281 (October 4, 1979): 358–59, doi:10.1038/281358a0.
  4. Xiao-Dong Li et al., “Cosmological Constraints from the Redshift Dependence of the Alcock-Paczynski Effect: Application to the SDSS-III BOSS DR12 Galaxies,” Astrophysical Journal 832 (December 1, 2016): id. 103, doi:10.3847/0004-637X/832/2/103.
  5. Xiao-Dong Li et al., “Cosmological Constraints from the Redshift Dependence of the Alcock-Paczynki Effect: Dynamical Dark Energy,” 5.
  6. Ross, The Creator and the Cosmos, 50–53.

 

Check out more from Dr. Hugh Ross @Reasons.org

 

About The Author

Dr. Hugh Ross

Reasons to Believe emerged from my passion to research, develop, and proclaim the most powerful new reasons to believe in Christ as Creator, Lord, and Savior and to use those new reasons to reach people for Christ. I also am eager to equip Christians to engage, rather than withdraw from or attack, educated non-Christians. One of the approaches I’ve developed, with the help of my RTB colleagues, is a biblical creation model that is testable, falsifiable, and predictive. I enjoy constructively integrating all 66 books of the Bible with all the science disciplines as a way to discover and apply deeper truths. 1 Peter 3:15–16 sets my ministry goal, "Always be prepared to give an answer to everyone who asks you to give the reason for the hope that you have. But do this with gentleness and respect, keeping a clear conscience." Hugh Ross launched his career at age seven when he went to the library to find out why stars are hot. Physics and astronomy captured his curiosity and never let go. At age seventeen he became the youngest person ever to serve as director of observations for Vancouver's Royal Astronomical Society. With the help of a provincial scholarship and a National Research Council (NRC) of Canada fellowship, he completed his undergraduate degree in physics (University of British Columbia) and graduate degrees in astronomy (University of Toronto). The NRC also sent him to the United States for postdoctoral studies. At Caltech he researched quasi-stellar objects, or "quasars," some of the most distant and ancient objects in the universe. Not all of Hugh's discoveries involved astrophysics. Prompted by curiosity, he studied the world’s religions and "holy books" and found only one book that proved scientifically and historically accurate: the Bible. Hugh started at religious "ground zero" and through scientific and historical reality-testing became convinced that the Bible is truly the Word of God! When he went on to describe for others his journey to faith in Jesus Christ, he was surprised to discover how many people believed or disbelieved without checking the evidence. Hugh's unshakable confidence that God's revelations in Scripture and nature do not, will not, and cannot contradict became his unique message. Wholeheartedly encouraged by family and friends, communicating that message as broadly and clearly as possible became his mission. Thus, in 1986, he founded science-faith think tank Reasons to Believe (RTB). He and his colleagues at RTB keep tabs on the frontiers of research to share with scientists and nonscientists alike the thrilling news of what's being discovered and how it connects with biblical theology. In this realm, he has written many books, including: The Fingerprint of God, The Creator and the Cosmos, Beyond the Cosmos, A Matter of Days, Creation as Science, Why the Universe Is the Way It Is, and More Than a Theory. Between writing books and articles, recording podcasts, and taking interviews, Hugh travels the world challenging students and faculty, churches and professional groups, to consider what they believe and why. He presents a persuasive case for Christianity without applying pressure. Because he treats people's questions and comments with respect, he is in great demand as a speaker and as a talk-radio and television guest. Having grown up amid the splendor of Canada's mountains, wildlife, and waterways, Hugh loves the outdoors. Hiking, trail running, and photography are among his favorite recreational pursuits - in addition to stargazing. Hugh lives in Southern California with his wife, Kathy, and two sons.



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