full moon Archives - DOES GOD EXIST? TODAY

November 19, 2021November 17, 2021

Full Moon – Mini-Moon

If you saw the full moon last night and the partial eclipse early this morning, you might have noticed that it seemed to be a little smaller than usual. That’s because it was a mini-moon.

The Moon’s orbit around Earth is slightly elliptical. For that reason, it is not always the same distance away from us. The average distance to the Moon is 238,855 miles (384,400 km). When it’s closest to Earth, the distance is 225,623 miles (363,105 km), and we call that “perigee.” When the moon is farthest away, the distance is 252,088 miles (405,696 km), and we refer to that as “apogee.” So the difference in the distance is approximately 26,500 miles (42,648 km), and that’s just enough to make a noticeable difference in and size.

Since the Moon is now at apogee, the result was that the full moon last night was smaller, and some people call it a “mini-moon.” Why should we care about the distance to the Moon? Two things make our Moon unique as compared to other moons in our solar system. The Moon’s orbit is less elliptical than that of other moons, and it is also the largest compared to the size of the planet it orbits. Because of its size and orbit, the Moon has many beneficial effects on our planet.

We have previously discussed some of the beneficial effects of the Moon, such as HERE, HERE, and HERE. However, perhaps the most crucial benefit is that it gives stability to Earth’s rotation. Spin a top, and you will notice that it tends to wobble in its rotation. That wobble is called “precession.” Without the Moon’s stabilizing effect, the Earth would wobble, causing instability in our seasons, climate, and weather. In other words, without the Moon, our planet could not support advanced life.

Even if you call it a mini-moon, the Moon is the right size and distance with an orbit that is only slightly elliptical. Because of those precise design factors, we can look up at the full moon and thank the Designer who gave us everything we need to make Earth our home.

September 19, 2021October 14, 2021

A Lesson in Perspective from the Moon

“It all depends on how you look at things.” You hear that common phrase applied to many kinds of issues. If you doubt that, here is a lesson in perspective from the Moon. First, let’s look at the facts about the Moon and what we think we see when we look at it. Astronomer Bob Berman’s article In the October issue of Astronomy magazine contains some interesting facts comparing what we see and reality.

How big is a full moon? Berman points out that it would take 180 full moons stacked on top of each other to fill the space between the horizon and a point directly overhead. The Moon is very small from our perspective, even though it appears large, especially when it’s near the horizon. How much brighter is the Sun than a full moon? The answer is that the Sun is 450,000 times more luminous. The Moon is a very dim object, just a little brighter than coal and much dimmer than dark green leaves. If you remember albedo from your high school physics class (the proportion of the incident light reflected by a surface), the Moon’s albedo averages 11, and a dark green forest is 15. Charcoal is 5.

Why does the Moon look so bright on a clear night when the Moon is at full phase? The answer is a lesson in perspective. Our eyes are designed to give measures of brightness based on what surrounds the object we’re observing. From our perspective, when we look at the Moon, we see an object in front of a black background. Our brain tells us that the Moon is white because its surroundings are completely black.

Astronauts have been to the Moon and found that most of its surface is basalt, a black volcanic rock. Basalt reflects very little of the light coming to it from the Sun. So compared to Venus or Jupiter, which have clouds efficiently reflecting light from the Sun, the Moon is a dim and dark object.

On a human level, there is a lesson in perspective. An old joke tells about the response a man gave when asked if his wife was beautiful. He responded, “Compared to what?” The same issue arises when someone asks if Christianity offers any advantage to a person or the world in general. Compared to all human philosophies, the answer has to be that the world and humanity have benefitted from the life and teachings of Jesus Christ. We are talking about the actual teachings of Christ, not the perversions such as the Crusades, the inquisitions, or ethnic struggles. What have atheism and secular humanism done to benefit the people of the world?

Jesus gave a lesson in perspective in Matthew 5:14-16 when he said, “You are the light of the world … let your light so shine before mankind that they may see your good works and glorify your Father which is in heaven.” The Sun is the source of the small amount of light we get from the Moon. Jesus is the source of the light we give to the world. The question for those of us who are Christians should be, “What is our albedo?” How much of what Jesus shines on us do we reflect on a very dark planet?

March 16, 2019March 15, 2019

Moon’s Golden Handle

If the sky is clear tonight (March 16, 2019), you will have an opportunity to observe an interesting phenomenon known as the Moon’s Golden Handle.

The Sun’s light will strike a mountainous area of the Moon at a shallow angle. The Moon will be in what is known as the waxing gibbous phase. Waxing means that more of it is becoming visible as sunlight increasingly illuminates the surface. Gibbous means that it is not yet a full moon, but it is more than a half moon. At this exact angle, the sunlight will illuminate the Jura Mountain Range, and the mountains will appear as an arc on the upper left side of the Moon’s visible surface. The arc resembles a tiny handle on the side of the Moon, so it has been called the Moon’s Golden Handle.

Galileo (1564-1642) observed this phenomenon as he looked through an early telescope. You can see it with a pair of binoculars. If you have a small telescope, you can get an even better view. The angle of the light gives a unique opportunity to get an idea of what the surface of the Moon is like. Not only does the Moon have mountains, but it has lava flows and numerous craters from bombardment by meteors.

The fact that we can predict when lunar eclipses will take place and when phases of the Moon will occur shows how much precision God has built into His creation of the cosmos. We know when the Moon’s Golden Handle will be visible because we can depend on that precision as we depend on God. “The heavens declare the glory of God and the firmament shows His handiwork” (Psalms 19:1).

January 30, 2018September 13, 2018

Super Blue Blood Moon Arrives

As most people know, tomorrow morning (January 31) before sunrise there will be a total eclipse of the Moon. It will not be an ordinary lunar eclipse because it will be a Super Blue Blood Moon. What does that mean?

It’s called “super” because the Moon is at perigee. That means the Moon is at its closest point to the Earth. The Moon’s orbit of Earth is somewhat elliptical so at times it is farther away, and sometimes it’s closer. At the closest point, it is somewhat larger and brighter than when it is at its farthest point, called apogee.

What about the “blue?” One thing for sure, the Moon won’t look blue. This will be the second full moon during January. Two full moons during one month don’t happen very often, only “once in a blue moon” as the saying goes. When we do have two in one month, the second full moon is called a “blue moon.”

Why is it called a “blood moon?” That’s because during a total lunar eclipse the Moon looks red. A lunar eclipse happens when Earth’s shadow blocks the Sun’s light from the Moon. Lunar eclipses only happen when the Moon is at its “full” stage because that is when the Sun and Moon are on opposite sides of the Earth. Only when the Moon, Earth, and Sun line-up perfectly does Earth’s shadow block the Sun’s light from reaching the Moon. However, even during a total eclipse some of the light from the Sun is bent by the Earth’s atmosphere enough that it reaches the Moon’s surface. The bending occurs mostly in the red end of the visible spectrum, so some red light reaches the Moon, and we see that red light reflected back to us. It’s the same red effect we see at sunrise and sunset.

So that’s how we can have a Super Blue Blood Moon. If you want to know when you can see the eclipse in your area, there are many websites that give that information such as NASA.gov.

If someone tries to tell you that this eclipse, or any solar or lunar eclipse, is a sign of some catastrophe or dramatic event that is about to happen, don’t believe it. The dramatic events are the eclipses themselves. The way the solar system has been designed to make life possible and allow us to enjoy watching eclipses is a demonstration of the wisdom and creativity of the Designer. Eclipses allow us to learn more about the system that God has created. We are in awe of this life-giving system.
–Roland Earnst © 2018