When it comes to moons, it seems that Earth got cheated. We have only one moon while Mars has two. Neptune has fourteen moons. Uranus has twenty-seven. Saturn not only has rings, but it also has sixty-two moons. Lucky Jupiter has sixty-seven! To add to the embarrassment, puny little Pluto, which is no longer considered a planet, has five times as many moons as Earth has! The only bragging point we have is that we can say we have more moons than Mercury and Venus. (They have none.) So how many moons are enough?
Actually, one works very nicely. Our single moon is critical to the existence of life on Earth. It’s because of the moon that Earth has a stable tilt on its axis of 23.5 degrees. That tilt prevents temperature extremes on this planet. With no inclination, the area of the Equator would be extremely hot and the poles extremely cold and dark all year. With a greater tilt, seasonal weather changes would be extreme all over the planet. Because of the angle of the inclination, we have proper seasons, and the air gets mixed to temper the weather extremes.
Our moon has the right mass at the right distance to keep Earth’s tilt stable. The moon plays several crucial roles in making our planet a great place to live, but stabilizing the tilt is one that’s extremely important. So how many moons are enough? I would say that one moon of the right size and at the right distance is just right.
Oh, and those other planets with more moons — none of them are habitable. Guess who has bragging rights now? Thank God that he gave us a just-right moon, and we don’t need any more. We see evidence of God’s design in every detail of our planet.
–Roland Earnst © 2018
A new study shows that gravitational fields of Venus-Jupiter affect Earth’s climate cycle. A research group at Columbia University’s Lamont-Doherty Earth Observatory and Rutgers University released the study on May 7, 2018. Jupiter is the largest planet in the solar system, and Venus is our closest planetary neighbor. Together they have a significant influence on the Earth’s climate.
Dennis Kent, who led the study said, “The climate cycles are directly related to how the Earth orbits the sun and slight variations in sunlight reaching Earth lead to climate and ecological changes.” The study shows that there is a repeating cycle which they calculate takes 405,000 years. That cycle causes wobbles in the Earth’s orbit leading to climate extremes. Not only do studies like this help us understand the past, but they also help in our understanding of current global conditions such as climate change.
The enormous number of things that have to be just what they are for life to exist on Earth continues to grow. In 1961, American astronomer Frank Drake, a founder of the SETI program, presented an equation that attempted to calculate the number of “earths” that might exist in our galaxy. Drake’s equation took the variables that must be right for a planet like ours to support life. He then multiplied the variables together to get the probability of another planet like ours.
Dr. Drake had only seven variables in his calculation, and today that number exceeds 50. We list 47 of them on our doesgodexist.org website, but even that list is far from complete. Now that we know that the gravitational fields of Venus-Jupiter affect Earth’s climate cycle, we have one more factor to add to the list.
Our planet is a delicate place, with an incredible number of factors all contributing to an environment where we can survive, and where humans have survived for a very long time. The more we know about the creation, the more evidence we see for a Creator.
–John N. Clayton © 2018
We have repeatedly pointed out that finding life on other planets has no bearing on the question of God’s creation of life on Earth. The Bible does not say that this is the only place where God created life.
Astronomers have observed over 3500 planets orbiting stars other than our Sun. Many writers have suggested that life in space is natural and likely because of the number of planets that exist. That assumption has a problem. There are an enormous number of variables that must be precisely controlled to allow life to exist.
Scientists have recently discovered that while it takes 243 days for Venus to rotate once, its atmosphere requires only four days in what is called “superrotation.” How can a planet’s atmosphere rotate 60 times faster than the planet itself? What effect does this have on the conditions at the surface of the planet where life could exist?
Another recent discovery concerns Proxima Centauri b, a planet orbiting in the habitable zone of the closest star to us other than the Sun. The star it orbits, Proxima Centauri, is continuously flaring and driving away any atmosphere that an orbiting planet might have. Astronomers working on the study of this star and the planets around it released a statement saying “any chance for life on Proxima Centauri b may be toast.”
We continue to find that the conditions needed for life on other planets are numerous. Having water is important, but many other factors must be carefully controlled for a planet to support even the most simple forms of life.
God’s creation of the Earth and the conditions that allow life to exist here becomes more and more amazing as we learn more about the cosmos.
–John N. Clayton © 2017
Data from Astronomy magazine, December 2017, pages 12 and 17.