The James Webb Space Telescope and an Encore from Hubble
James Webb Space Telescope illustration courtesy of ESA/Hubble (Northrup Grumman).
As the James Webb Space Telescope entered orbit in a neutral gravity zone one million miles from Earth, the waning days of Hubble revealed an astronomical surprise.
June 22, 2022 by Fr. Gordon MacRae
“Where were you when I laid the foundations of the Earth? Can you bind the chains of the Pleiades or lose the chords of Orion?”
— Job 38:4,31
“Astronomy, Cosmology, Physics, Theology, History! Reading this blog is like enrolling in a graduate program at NYU.” That message was sent to me in a letter several years ago from a friend, an official of the Archdiocese of New York. I have written a good deal about the sciences of astronomy and cosmology, but only about a dozen posts over the 13-year lifespan of this blog.
In a recent telephone call from exile to my friend, Father George David Byers, STD, SSL, he chided me that I am way overdue for a science post. I cite his academic credentials here — a Doctorate in Sacred Theology from the Pontifical University Angelicum in Rome and a Licentiate in Sacred Scripture from the Pontifical Biblical Institute in Rome and Jerusalem — to reflect that his suggestion of a mere “science” post might contain just a hint of academic hubris. If so, I can only respond with a quote from the great English poet, Samuel Taylor Coleridge: “And the Devil did grin, for his darling sin is pride that apes humility.”
I actually did write a science post even before Father Byers brought it up. Please don't yawn or click me away just yet. For me, this is a very big deal and it has a “WOW” factor. The Hubble Space Telescope, launched into Earth orbit in 1990, has been operating for 32 years and has far exceeded its intended operational limit. In the waning days of Hubble, it surprised Earthbound scientists with an amazing discovery. I will get to it below, but first ...
Star Trek: The Next Generation
The next generation of space exploration was born with the December 25, 2021 launch of the James Webb Space Telescope (JWST). It has recently arrived at its designated orbit in what is called a “Lagrange point.” Named for the 18th Century French mathematician and physicist, Joseph Louis Lagrange, a “Lagrange point” is a zone of neutral gravity between the Earth and the Sun about one million miles from Earth. That point is now host to the revolutionary James Webb Space Telescope.
Thousands of scientists and engineers took part in this project on the cutting edge of astronomical science. The Space Telescope Science Institute will operate and monitor it from Baltimore. Webb successfully separated from its launch vehicle and unfolded a giant solar array to power the telescope. Armed with huge primary and secondary mirrors and a suite of cameras, spectrometers, and other instruments, the Webb Telescope is the size of a large truck. It is capable of producing spectral images of 100 galaxies at a time. As one scientist described it:
“[Webb] will crack open the treasure chest of the magnificent infrared sky invisible to the human eye. If a bumblebee hovered in space at the distance from Earth to the Moon, Webb will be able to see both the sunlight it reflects and the heat it emits.”
One of the burning questions of both science and faith that Webb may lend itself to solving is the existence of life elsewhere in the Universe. All the latest media craze about evidence of UFOs points only to Earth-bound technology. Distances between stars are like impenetrable barriers. If sentient life exists, we will detect each other long before we ever encounter each other. So far, after decades of searching, no such evidence yet exists.
A general consensus among astronomers is that life does exist “out there,” but complex life is much more rare, and sentient complex life like us, if it exists elsewhere at all, is extremely rare. I once wrote a post laying out a case for our uniqueness in the Cosmos. It was, “Star Trek and the Search for Extraterrestrial Intelligence.”
That post introduced readers to a remarkable contributor to the science that made the Webb Space Telescope possible. Astronomer Vera Rubin defied all the stereotypes of her time to become one of the great icons of cosmology. She discovered that the visible Universe that we see in the night sky is only about 10 to 15 percent of what is actually there. She wrote of this in “Dark Matter in the Universe” (Scientific American, 1998):
“As we have done for centuries, we gaze into the night sky from our planetary platform and wonder where we are in this cavernous cosmos. Flecks of light provide clues about great objects in space. And what we do discern about their motions and apparent shadows tells us that there is much more that we cannot yet see.
“From every photon we collect from the universe’s farthest reaches, we struggle to extract information. Astronomy is the study of light that reaches Earth from the heavens. Our task is not only to collect as much light as possible — from ground and space-based telescopes — but also to use what we can see in the heavens to understand better what we cannot see and yet know must be there.
“Based on 50 years of accumulated observations of the motions of galaxies and the expansion of the universe, most astronomers believe that as much as 90 percent of the stuff constituting the universe may be objects or particles that cannot be seen. In other words, most of the universe’s matter does not radiate. It provides no glow that we can detect in the electromagnetic spectrum. … We call this missing mass ‘dark matter,’ for it is the light, not the matter, that is missing.”
— Vera Rubin, 1998
In coming months, the first images to come from the James Webb Space Telescope now hovering one million miles between Earth and the Sun may provide humanity’s first illumination of dark matter, that 90-percent of the Universe that we have never before seen. The Webb Telescope enormous primary mirror has unfolded perfectly. In coming months Webb’s first images of the ancient cosmos will arrive on Earth. Be prepared to be amazed!
A Pre-retirement Surprise from Hubble
My favorite post of the past year is one that was only half written by me. The other (and far better) half was written by Fr. Andrew Pinsent, a noted particle physicist and Research Director at the Ian Ramsay Center for Science and Religion at Oxford University in the U.K. I was way out of my element in this joint venture, but it was this humble blog’s best foot forward. The jointly written post was, “Fr Georges Lemaître, the Priest Who Discovered the Big Bang.”
It was among our most popular and enduring posts of the last year. Perhaps it was just a nice break from this world’s seemingly never-ending preoccupations with war, pestilence, scandal, and other obsessions of our time.
In that post, I quoted an excerpt from the book, Einstein’s Heroes: Imagining the World Through the Language of Mathematics (Oxford University Press, 2005), a wondrous book by a brilliant mathematician, Robyn Arianrhod:
“In 1931, [Georges] Lemaitre formally sowed the seeds of the Big Bang theory when he suggested the universe had started as an explosion of a ‘primeval atom,’ and that it had continued expanding from that explosive beginning.... Einstein’s equation predicted the universe had expanded not from a tiny piece of matter located in an otherwise empty cosmos, but from a single point in four-dimensional space-time .... Before this point, about thirteen billion years ago, there was no time and no space. No geometry, no matter, nothing. The universe simply appeared out of nowhere. Out of nothing.” ( p. 187)
“The Universe simply appeared out of nowhere. Out of nothing.” And it all happened in an instant 13 billion years ago on “A day without yesterday.” This conclusion of modern cosmology was the work of a brilliant priest, mathematician and physicist, Fr. Georges Lemaitre. If you wonder about the relevance of faith in the scientific world, you may be surprised to learn that science and the Catechism of the Catholic Church are on the same page in describing the origin of a created universe:
“God created the universe out of nothing.” (CCC 290)
“We believe that God needs no pre-existent thing or any help in order to create. God created freely out of nothing.” (CCC 296)
“God said, ‘let there be light,’ and there was light” (Genesis 1:4). Scripture bears witness to faith in creation ‘out of nothing’ as a truth filled with promise and hope.” (CCC 297)
“Since God created everything out of nothing, He can also, through the Holy Spirit, give spiritual life to sinners by creating a pure heart in them, and bodily life to the dead through the Resurrection.” (CCC 298)
The Hubble Space Telescope is destined to soon retire, but not before it gave us some amazing images of the visible Cosmos. Its latest surprise is a photograph of the most distant star ever seen by human eyes or instruments, a star now called “Earendel.” It is 28 billion light years from Earth. A light year is a measure of distance and not of time. It is the distance light travels in a single year at the constant rate of 186,000 miles per second. A light year works out to be 5.6 trillion miles. Multiply that by 28 billion and that is the distance from Earth to Earendel. Please don’t ask me to convert this to kilometers.
The light Hubble captured from Earendel emanated from the star 12.9 billion years ago in the very infancy of creation as calculated by Fr. Georges Lemaitre. The only reason Hubble could spot this star is because of a rare cosmic alignment. A galaxy cluster beyond the Milky Way — our galaxy — was positioned in such a way that its gravity bent light creating a sort of cosmic magnifying lens.
If you did the math, you might have noticed that Earendel is twice the distance of the age of the Universe which is possible only because the Universe has continually expanded over those 13 billion years. This expansion, and the now proven fact that galaxies are defeating gravity by speeding away from one another, was also a discovery of the physics of Fr. Georges Lemaitre which in the end were applauded and embraced by Albert Einstein.
Who says priests are boring?
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Star Trek and the Search for Extraterrestrial Intelligence
Fr Georges Lemaître, the Priest Who Discovered The Big Bang
“A Day Without Yesterday:” Father Georges Lemaitre and The Big Bang
