space travel Archives

January 22, 2026January 17, 2026

Space Travel Brain Shifting

Space travel can change your brain in more ways than one. We have mentioned the “overview effect” that people experience when looking down on planet Earth from space. It can open a person’s mind to the realization that we are small and that we depend on the components for survival that God has provided on this planet. New research indicates that space travel and weightlessness can also affect your physical brain. You could call it space travel brain shifting.

Brain MRI scans of 26 astronauts and 24 non-astronauts, conducted by Rachel Seidler and others at the Massachusetts Institute of Technology (MIT), revealed how microgravity affects human brain anatomy. Their research showed that the astronauts’ brains shifted backward and upward while also rotating upward. The effects could still be detected months after returning to Earth. They analyzed MRIs from 15 astronauts before and after spaceflight, and from 11 others after returning. Twenty-four other volunteers participated in a long-duration head-down tilt bed experiment.

There was a measurable change in how the astronauts’ brains fit inside their skulls depending on how long they spent in space. The maximum displacement was 2.52 millimeters. The bed rest control group did not show marked changes. The question is how the space travel brain shifting affects performance after returning to Earth. The astronauts did experience balance issues, apparently due to effects on the inner ear and sensory regions of the brain.

The bottom line is that the study showed that physical shifts in the astronauts’ brains lasted up to six months. The study is concerned about “the long-lasting effects of spaceflight on neuroanatomy.” Again, we are reminded of how much we depend on the components for survival that God has provided on this planet.

Reference: space.com

February 12, 2025February 10, 2025

Astronaut Eyes in Space

We read many quotes from various sources about humans traveling to the Moon, Mars, or some distant moon of Jupiter or Saturn. Most media stories seem to indicate that all astronauts would need to survive the journey is a space suit. They overlook the fact that the human body is carefully engineered to survive on Earth, but studies from the International Space Station show a new challenge for astronaut eyes in space.

We can address the damage to the heart and some other organs by providing enough cardiovascular activity on treadmills. However, new data on astronaut eyes in space show that long periods of weightlessness affect ocular biomechanics. More than 70% of astronauts on the International Space Station have Spaceflight-Associated Neuro-Ocular Syndrome (SANS).

NASA collected data on 13 astronauts who spent between 157 and 186 days in a weightless environment. The studies detailed a 33% decrease in ocular rigidity, an 11% decrease in interocular pressure, and a 25% reduction in ocular pulse amplitude. These changes caused decreased eye size, an altered focal field, optic nerve edema, and retinal folds. The researchers point out that some of these effects can produce long-lasting changes in the eye’s mechanical properties.

Science shows that the human body is engineered and designed for the gravitational effects of our planet. If only one or two things were essential for life on Earth, you might attribute it to chance. We are not talking about one or two things but the human body as a total unit. Every organ has to adjust when the body is subjected to weightlessness, but most organs cannot change. When NASA put Scott Kelly in space and his identical twin Mark stayed on Earth, it provided a comparison. Scott was in space for 340 days during 2015-16, and there were changes in his DNA and numerous changes in his body.

Now, we have additional data showing the effect of weightlessness on astronaut eyes in space. Some items like ocular pressure have potential complications like glaucoma. It is obvious that our bodies are engineered with many individual characteristics essential for life. The more variables that must be “just right,” the less likely it is that the final product could exist by chance.

For an airplane to fly, thousands of features must be carefully engineered. That requires engineers, not chance. That is even more true for the human body. God carefully designed us to live on planet Earth, and the media often oversimplifies what we need for space travel. Look in the mirror and behold the handiwork of God. (See Psalms 139:14.)

— John N. Clayton © 2025
References: National Institutes of Health, NASA, and Glenn Research Center

December 7, 2023December 5, 2023

Earth Is Designed to Sustain Humans

Nearly every day brings an announcement of discoveries by various space agencies showing that our unique planet Earth is designed to sustain humans.

The Webb space telescope found a planet as large as Jupiter but much less dense, and researchers have dubbed it the “cotton candy planet.” It has winds up to 10,000 mph and large amounts of sulfur dioxide in an atmosphere of sand that acts like rain. Another discovery from the Webb space telescope is that there are free-floating planet-sized objects similar in size to Jupiter but not in orbit around any star. No model of planet and star formation explains these strange objects.

Discoveries of the Webb telescope show the complexity of the cosmos, complicating travel in space. Additionally, NASA has released data showing that humans suffer significant body changes in weightlessness for an extended time. Astronaut Scott Kelly was in space for roughly a year, and his heart diminished in size by nearly a third and became rounder. Astronauts have had bone density changes of up to 2% a month, and radiation significantly affects their DNA. Reported psychological issues called “detachment phenomena” make astronauts unreceptive to instructions from mission control.

Humans were created to live on planet Earth, and Earth is designed to sustain humans. Simply transporting humans to a space environment doesn’t work easily. Creating an environment similar to what God gave us will require massive scientific work and may be impossible. The idea that people can survive on other planets going around other stars in the near future makes good science fiction but is not practical. We must learn to get along and solve our problems here on Earth. The belief that we are here by chance becomes harder and harder to accept as we learn more about both space and ourselves.

Reference: The Week for December 8, 2023, pages 11 and 22, and October 20, 2023, page 22.

May 2, 2022April 30, 2022

Medical Challenges of Space Travel

Space exploration presents many challenges, but the medical challenges of space travel may dwarf the technical challenges. Spending lengthy sojourns on the International Space Station (ISS) has already shown some of the problems that future space travelers will face.

One problem astronauts face is space anemia caused by a lack of red blood cells. On Earth, the human body makes two million red blood cells every second to replace the ones that are lost. In space, the astronauts’ bodies lose three million red blood cells each second, and they must replace those cells. Anemia results from a shortage of the red blood cells needed to carry oxygen to all parts of the body. It causes fatigue, dizziness, and weakness.

Space anemia was well-known, but scientists thought the body would adapt and correct the problem after an extended time in space. Unfortunately, a recent study of 13 astronauts has shown that it is not corrected after six months on the ISS. Furthermore, it took three to four months to restore a near-normal red blood count after the astronauts returned to Earth. There was still a thirty percent greater loss of red blood cells even after that.

A new study on cosmonauts in the ISS shows another area of concern. Scientists studied the brains of twelve cosmonauts just before and after their space flights and again seven months after they returned to Earth. They used computer reconstruction of data from magnetic resonance imaging (MRI) to study the structure (gray matter) and connectivity (white matter) in the brain. The research showed shape changes in the brain, especially in the corpus callosum, a large bundle of nerve fibers that connect the brain’s two hemispheres. In addition, researchers detected “changes in the neural connections between several motor areas of the brain.” But, perhaps, the most concerning is that in the brain scans taken seven months after the cosmonauts returned to Earth, the changes to the brain were still present.

A journey to Mars and back will take more than twenty months. During that space flight, astronauts will need protection from radiation, food for proper nourishment, and to replenish red blood cells while they experience “rewiring” of their brains. The many medical challenges of space travel remind us how blessed we are that God has given us the perfect planet to call home.

References: EurekAlert.org and Frontiers In Neural Circuits

December 13, 2021December 12, 2021

Space-Travel Adventure Movies

Space-travel adventure movies and novels may be fascinating, but they are not very realistic. Traveling through space poses many hazards to humans beyond equipment failures. There is also the danger of radiation exposure when a person leaves Earth’s protective atmosphere and magnetic field. And perhaps the most significant of all is the issue of time.

Travel to the Moon will take days. Traveling to Mars will take months. A space-travel adventure to any planet outside of our solar system would take multiple lifetimes. Astronomers have toyed with the idea of traveling to a planet orbiting Proxima Centauri, which is the closest star to us. That planet, Proxima Centauri b, is 42 light-years from Earth. Unless someone could find a way to travel through a wormhole, if such a thing exists, it would take 6,300 years to make the journey with present technology.

We are considering the present technology to be the speed of the Parker Solar Probe launched in 2018, which is 430,000 miles (690,000 km) per hour, or about .064 percent of light speed. According to Astronomer Dr. Hugh Ross, the laws of physics would limit the top speed of a spaceship to about one percent of light speed, but we are far from achieving that. Also, a factor to consider would be a way to slow down on approaching the destination to avoid going right past it or crashing into it.

So, if we sent out a space-travel adventure crew to Proxima Centauri b, it would take many generations to arrive. That means people would have to reproduce many times on the way. Factors to be considered would have to include having enough crew members and genetic diversity to have a healthy crew on arrival at the destination. Using computer modeling, scientists have determined that the minimum team required would be 49 males and 49 females. Ninety-eight crew members would need a large ship. In addition, there would have to be facilities for recreation and to grow food.

The vast majority of the travelers on this spacecraft would never see Earth or the destination planet. Exposure of many generations to the radiation of outer space could cause physical or mental deformities that we can’t imagine. What if this small community just couldn’t get along together in cramped quarters? Avoiding a mutiny or rebellion would be a significant challenge. Keeping hundreds of generations focused on the same mission would be impossible. Putting the crew into a cryogenic state for thousands of years to avoid the multi-generation problem does not seem to be realistic. (Remember the movie “2001: A Space Odyssey?”)

Producing food and recycling water would be essential for such a space-travel adventure. However, taking and preserving all equipment and materials needed for the crew to survive in a hostile environment on arrival at the alien planet would be impossible to plan or predict.

We may enjoy science fiction such as “Star Trek,” “Star Wars,” or “Lost in Space,” but none of them are even remotely realistic. God has given us a beautiful planet with everything we need to survive and thrive. What we must do is take care of it. That means using resources wisely, protecting the environment, and protecting the animals that share the planet with us. Stewardship of God’s gifts was a command from the beginning. (See Genesis 2:15.)

References: TechnogyReview.com, Space.com, and Why the Universe is the Way it Is by Hugh Ross.

January 29, 2021January 24, 2021

Potential Health Problems of Space Travel

More and more data shows that leaving Earth and venturing into outer space away from Earth’s constant gravity and the protection of our atmosphere and magnetosphere is much more destructive than anyone imagined. One of our regular readers sent us a quote from NBC News about the potential health problems of space travel. Here is what it says:

“The number of deaths due to heart disease among the Apollo lunar astronauts is almost five times greater than that in non-flight astronauts, or astronauts who never flew missions in space, researchers from Florida State University found. Compared to astronauts who flew only in low Earth orbit (LEO), the heart risk among Apollo astronauts is four times higher. There were no differences between LEO and non-flight astronauts.”

We recently reported on the astronaut twin study, which showed physical changes even in low Earth orbit. We don’t yet know what potential health problems of space travel may become evident in the long-term.

Micro-gravity and exposure to radiation seem to combine to cause bodily harm. Earth’s magnetic field is more protective than science has understood. Working in the International Space Station is less of an issue because the LEO means that some of Earth’s protections still function. Going to Mars may be impossible with the present spaceship design.

We will be interested in future data on travel to the Moon and prolonged existence in outer space. We know that God’s design of planet Earth makes it suitable for life, but we are not fully aware of the potential health problems of space travel. You can read the full NBC report from HERE.

September 29, 2020September 29, 2020

Radiation Levels on the Moon

God created planet Earth for us to live on, and He designed us with what we need to survive here. The more we learn about conditions elsewhere in the solar system, the more we see how unique Earth is. Recently we have seen research data concerning radiation levels on the Moon. Our studies reveal that astronauts on the Moon could get up to 1000 times more radiation than what we experience on Earth.

Dr. Kerry Lee at the Johnson Space Center in Houston has analyzed data from a Chinese-German team. The Germans used data retrieved by a Chinese lander named Chang’e 4. They compared it with data from a NASA orbiter that has been circling the Moon for over ten years. The two sets of data agree 100%. The primary risk factor for humans is cancer. The message is that if humans try to exist on the Moon, they will need thick-walled shelters for protection.

We take for granted the romantic idea that humans can wander around space, looking for new information about the stars and planets. In doing that, we fail to realize how carefully designed the Earth is to avoid the dangers of radiation in space. Astronauts in the International Space Station get three times less radiation than the radiation levels on the Moon.

Our upper atmosphere and magnetic field help to shield us from radiation. God carefully designed the Earth with features to protect us from radiation from the Sun and other stars. Proverbs 8:22-30 finds wisdom speaking about the creation. The more we look out into space, the more we see the necessity of wisdom in making a world where we can live safely.

Data from Associated Press, September 26, 2020.

September 22, 2020September 21, 2020

Mighty Mouse Drug May Help Space Travel

One of the problems with space travel is that the human body was designed to live on Earth. When people are in weightlessness for an extended time, they lose muscle and bone mass. This loss can be as much as 20%. A possible solution might be called the “mighty mouse drug.”

Dr. Se-Jin Lee of the Jackson Laboratory at the University of Connecticut has published findings of a drug that blocks a pair of proteins that typically limit muscle mass. When scientists treated mice with this drug, they maintained their weight and muscle mass even when they were in the International Space Station for a month.

The application of this research can do more than provide a way for humans to survive a trip to Mars. It may also benefit people who are confined to a bed or a wheelchair.

This research reminds us that God designed our bodies to function in Earth’s gravity, just as He designed Earth to support life. Problems occur when we subject our physical bodies to forces they were not designed for. These problems require extreme solutions, and God has given us the ability to use science to find solutions such as the mighty mouse drug.

Source: Associated Press 9/12/20, and Fierce Biotech.

August 25, 2019August 25, 2019

Storm Area 51 Craziness

For many years UFO and alien proponents have maintained that in the government is hiding aliens from outer space at a U.S. Air Force Testing Range in a remote area of Nevada. The believers call it “Area 51.” The story goes that there are secret discussions about elaborate plans for our planet. For most people, this is just a big joke, but for many others, this is their religion. It is their hope for getting away from the struggles of life and the violence and sickness around us. An internet meme called “Storm Area 51” has attracted people to come and celebrate the area.

Promoters have planned a three-day September music festival called Alienstock. They expect 10,000 people to come to Lincoln County, Nevada (population 5,200). The Alien Research Center in Hiko, Nevada, (population 110) plans an exposition in September. The internet post is inviting people to trespass into the military’s remote test area. They are hoping for 35,000 to 40,000 people for that. If that happens, a confrontation with the military is possible. There are only 184 hotel rooms in the entire county (over 10,000 square miles), so local officials are concerned about how far local resources will go.

You can laugh off “Storm Area 51” as a crackpot waste of time and money, but it has received wide publicity. The Associated Press ran an article on it on August 21, 2019, and it has been featured on web news outlets. You can be sure that significant numbers of people will be there. Many others who will not go still believe the propaganda barrage that has accompanied it. The old saying “If you don’t believe in SOMETHING you will believe ANYTHING” seems to be in order here.

Let us say once again, that the Bible doesn’t tell us that this is the only place where God has created life. However, there is no evidence of alien visitation or manipulation in the entire history of our planet. Spending money on a PR program like “Storm Area 51” is merely a foolish waste of money which could be used in far better ways.
— John N. Clayton © 2019

August 9, 2019August 8, 2019

Nazca Lines and Birds

Nazca Lines and Birds One of the enduring UFO claims has been the massive drawings on Peru’s Nazca desert plateau. As far back as Eric Von Daniken’s book Chariots of the Gods in 1968, there have been those who claim that people on the Earth could not have made the drawings. They claim that the lines marked out landing strips for alien space crafts. It has been proven that people CAN, in fact, make huge drawings visible from space. However, there have not been good explanations as to what the Nazca drawings represent. Masaki Eda, a zooarchaeologist from Hokkaido University in Japan, seems to have found some clues in his recent study of the Nazca Lines and birds.

The large hummingbird drawing, which has been popularized, is an excellent portrayal of a bird known as the long-tailed hermit. Two other drawings that Eda has identified are a pelican and a guano bird. This doesn’t answer all of the mysteries of the Nazca lines, however, because those birds are rainforest or coastal birds, and the Nazca plateau is a desert. Social anthropologists studying the religions and myths of the people of the area may tell us more. There is still much to be learned about the Nazca lines and birds.

As we have emphasized before, the question of life in space is not a biblical issue and has no bearing on the scientific evidence for the existence of God. It is essential to realize that we live in a world that is as God describes it in the Bible, and He has given us the responsibility to care for it. Aliens are not our creators. The evidence does not support substituting UFOs or alien abduction theories for honoring God and living the life Christ calls us to live.
— John N. Clayton ©