A well-designed home is a house where every room, wall closet, and cabinet of the interior has been configured to suit the specific needs and desires of the residents. For that to be possible, however, the house itself needs well-specified interior and exterior designs. What is true for our homes is also true for our galaxy, our galaxy cluster, and our supergalaxy cluster, and it seems that they all are well-designed indeed.

In previous blogs I have written about the extraordinary interior designs of our Milky Way Galaxy (MWG) that make the existence of advanced life possible.1 I have also addressed the designs that are necessary in the interior regions of the Local Group of galaxies and in the Virgo Cluster of galaxies.2 In this blog I will describe how astronomers discovered that we live not only in a small cluster of galaxies (the Local Group) that is on the outskirts of a large cluster of galaxies (the Virgo Cluster), but also in a now well-understood and defined supercluster of galaxies dubbed Laniakea, which itself is surrounded by even larger superclusters of galaxies.

Laniakea Supercluster
Astronomers have known for more than three decades that galaxy clusters group together to make superclusters of galaxies. What astronomers lacked, however, was a means for unambiguously determining the boundaries between these superclusters. That lack was overcome in 2014 by a breakthrough analysis of a three-dimensional map of the positions and velocities of 100,000 nearby galaxies by a team of four astronomers, led by University of Hawaii’s Brent Tully.3

Tully and colleagues used the recession velocity measurements of galaxies in the Cosmicflows-2 Galaxy Catalogue. They subtracted contributions resulting from the expansion of the universe from the recession velocities, and the resultant “peculiar velocities” revealed the gravitational interactions that the galaxies exerted upon one another. Tully’s team noted that large-scale maps of galaxy peculiar motions exposed “basins of attraction.”

A basin of attraction is one where the peculiar velocity flow fields of huge aggregates of galaxies all flow toward one region. In other words, “the boundaries of a supercluster are defined by the places at which the velocity flow field points in different directions on either side of the boundary.”4 This technique yields the first specific definition of a supercluster of galaxies. Figure 1 shows how the peculiar velocities of the nearest 100,000 galaxies defines the extent of the local supercluster that is home to our MWG. Tully and his colleagues named this supercluster Laniakea—a combination of two Hawaiian words, lani and akea, which mean “heaven” and “immeasurably spacious,” respectively.

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Figure 1: Peculiar Velocity Map of the Laniakea Supercluster of Galaxies. The yellow-orange lines show movements of galaxies toward the Great Attractor, the confluence point slightly above and left of center. The blue lines show movements of galaxies away from the Great Attractor. The boundaries between the yellow-orange and blue lines delineate the extent of the Laniakea supercluster. The red dot shows the location of the Milky Way Galaxy. Image credit: Institut de recherche sur les lois fondamentales de l’Univers

Laniakea contains about 100,000 galaxies in 300–500 galaxy clusters. It stretches out over 160 megaparsecs (520 million light-years). It has a total mass of 100 quadrillion solar masses, about 100,000 times greater than the total mass of the MWG. Figure 2 shows the positions of the galaxy clusters that comprise the Laniakea supercluster.

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Figure 2: Map of the Galaxy Clusters Comprising the Laniakea Supercluster. The small red dot slightly above and left of center shows the position of the Local Group of galaxies of which the Milky Way Galaxy is a member. Image credit: Andrew Z. Colvin, Creative Commons Attribution

Design Features of the Laniakea Supercluster
The two relatively low-resolution images in this blog do not adequately display the design features of Laniakea that make advanced life in our MWG possible. Therefore, I have created a library of 26 images, 19 of which I derived from a 176-megapixel image graciously made publicly available by Andrew Colvin. The other 7 images include figure 1 above, 3 Hubble Space Telescope images, 2 maps of the Local Group galaxies that I created, and a COBE satellite image of the dipole structure of the cosmic microwave radiation background.

In my next blog (Supercluster Design, Part 2) I will use the new 26-image library to examine the design features of the Laniakea supercluster in which the Virgo Cluster, the Local Group, and the MWG reside. I will describe for lay readers what each image reveals about the structure of galaxy clusters, superclusters of galaxies, and/or the universe as a whole. I will also explain how their features establish fine-tuned designs that allow for advanced life in our galaxy—designs that more than hint at a Designer.

Featured image: Laniakea Supercluster of Galaxies.
Image credit: R. Brent Tully et al., Nature 513 (September 4, 2014): 72

Check out more from Reasons to Believe @Reasons.org

Endnotes
  1. Hugh Ross, “Spiral Arms Designed for Life,” Today’s New Reason to Believe (blog), Reasons to Believe, June 2, 2019, https://www.reasons.org/explore/blogs/todays-new-reason-to-believe/read/todays-new-reason-to-believe/2019/06/03/spiral-arms-designed-for-life; Hugh Ross, “A Supermassive Black Hole Like No Other, But Optimal for Life,” Today’s New Reason to Believe (blog), Reasons to Believe, May 20, 2019, https://www.reasons.org/explore/blogs/todays-new-reason-to-believe/read/todays-new-reason-to-believe/2019/05/20/a-supermassive-black-hole-like-no-other-but-optimal-for-life; Hugh Ross, “Milky Way Galaxy’s Midlife Crisis,” Today’s New Reason to Believe (blog), Reasons to Believe, October 3, 2011, https://www.reasons.org/explore/blogs/todays-new-reason-to-believe/read/tnrtb/2011/10/03/milky-way-galaxy-s-midlife-crisis; Hugh Ross, “The Milky Way: An Exceptional Galaxy,” Today’s New Reason to Believe (blog), Reasons to Believe, July 30, 2007, https://www.reasons.org/explore/blogs/todays-new-reason-to-believe/read/tnrtb/2007/07/30/the-milky-way-an-exceptional-galaxy.
  2. Hugh Ross, “No Nearby Nasty Supermassive Black Holes,” Today’s New Reason to Believe (blog), Reasons to Believe, May 13, 2019, https://www.reasons.org/explore/blogs/todays-new-reason-to-believe/read/todays-new-reason-to-believe/2019/05/13/no-nearby-nasty-supermassive-black-holes; Hugh Ross, “Life Requires Galactic and Supergalactic Habitable Zones,” Today’s New Reason to Believe (blog), Reasons to Believe, April 8, 2019, https://www.reasons.org/explore/blogs/todays-new-reason-to-believe/read/todays-new-reason-to-believe/2019/04/08/life-requires-galactic-and-supergalactic-habitable-zones; Hugh Ross, “Living on the Edge,” Today’s New Reason to Believe (blog), Reasons to Believe, January 14, 2019, https://www.reasons.org/explore/blogs/todays-new-reason-to-believe/read/todays-new-reason-to-believe/2019/01/14/living-on-the-edge.
  3. R. Brent Tully et al., “The Laniakea Supercluster of Galaxies,” Nature 513 (September 4, 2014): 71–73, doi:10.1038/nature13674.
  4. Elmo Tempel, “Meet the Laniakea Supercluster,” Nature 513 (September 4, 2014): 41–42, doi:10.1038/513041a.
  5. Ross, “Milky Way Galaxy’s Midlife Crisis”; Lulu Liu et al., “How Common Are the Magellanic Clouds?” Astrophysical Journal 733, no. 1 (May 20, 2011): id. 62, doi:10.1088/0004-637X/733/1/62.

 

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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