The moon will reach its maximum distance from Earth on November 19th, a point it won’t revisit until 2043. This isn’t a visible event for casual observers, as it occurs during a new moon phase when the moon is close to the sun in the sky.
The Science of Lunar Distance
The Earth-moon distance isn’t fixed. It varies due to the complex gravitational interactions between the Earth, the moon, and the sun. The moon orbits Earth in an elliptical path, meaning its distance fluctuates between its closest point (perigee) and farthest point (apogee).
The sun’s gravity plays a major role : it tugs on the moon, influencing its orbit and contributing to these variations. When the Earth, sun, and moon align during a new moon, the effect is amplified, potentially resulting in an exceptionally distant “micromoon.”
Why This Matters
This event highlights the dynamic nature of our solar system. While not noticeable to the naked eye, this distant apogee is a measurable astronomical phenomenon. The Earth-moon distance slowly increases over time (about 1.5 inches per year) due to tidal interactions, but these short-term orbital fluctuations are a more immediate factor.
When and Where Will It Be Most Distant?
The moon will reach its most distant point at 9:46 p.m. ET on November 19th (0246 GMT on November 20th). At that moment, it will be roughly 247,700 miles (398,600 km) from Western Australia – the part of Earth facing the moon at that time.
What Can You Do Instead?
While you won’t see this distant moon, the dark nights around a new moon are ideal for observing fainter deep-sky objects. For example, the Perseus Double Cluster can be viewed with binoculars. If you’re interested in stargazing, consider upgrading your equipment: telescopes and binoculars are great options for deeper observations.
The moon’s varying distance is a reminder that even seemingly stable celestial bodies are subject to constant, subtle shifts in their orbits. This event underscores the interconnectedness of gravitational forces in our solar system.
