Look up! December Meteor Showers

Blog vol 5.25. Look up! December Meteor Showers.


The Geminids are here, a meteor shower radiating from the constellation of Gemini.   This is an annual show in the Northern Hemisphere that starts in early December and will peak on the 13 and 14th of this month.  The Geminids are special because they start at 7 pm, a convenient time to step out the door and have a look.


The Zenithal Hourly Rate (ZHR) is the hourly rate at which the shower will display meteors entering the atmosphere under ideal conditions: a new moon, clear sky, and the radiant directly overhead. The University of Western Ontario has a neat gage that indicates the ZHR for the next 24 hours (check it out here).


Tonight (December 11) the ZHR is 84, which tells us that under ideal conditions the observer can see 84 meteors in an hour. Unfortunately, this year’s display will be washed out by a full moon, reducing that number to half the value (clouds are also a problem, reducing the visibility to 0). At the Geminids’ peak, one can see as many as 150 meteors per hour.


The next shower is the Quadrantids, which will peak on the nights of January 2-3, 2025. The Quadrantids are named after the now defunct constellation, Quadrans Muralis, and will only appear for a couple hours each night most clearly from Northern positions. Its ZHR will peak at 120, but the cool thing is that the moon will just be starting to wax, which means more visible “stars”.  


The third major meteor shower is the Perseids which will peak August 12, 2025, but will require a late evening to see them. The Perseids’ radiant is the constellation of Perseus. It has a ZHR of over 100, but this coming year the moon will be just starting to wane, meaning that less meteors will be visible.


The showers happen when the earth’s atmosphere passes through the remains of a comet (sometimes, but rarely, an asteroid) as the earth travels around the sun. The debris enters our atmosphere and burns up, creating a shooting star. You can go out with your own two eyes to watch, a wonderful thing and accessible to everyone. But, if you have a big enough telescope, you can watch the “stars” from the Geminids hit the moon because they do not burn up in its lighter atmosphere, at the rate of about one every 20 minutes, so interesting.


As they say, ”Geminid showers bring Christmas flowers”, just made that up :)



Til next week,

 

 

The good doctor


By Dr. Mark Germain May 1, 2026
The good doctor discusses how the eye is a window to the heart with the help of the OCT.
The good doctor take a deeper look at how gut health is connected to eye tissues.
By Dr. Mark Germain April 29, 2026
Blog vol 6.40. The Gut and the Eyes. One of my biggest jobs is to keep abreast of new research and advances in eye health. Most recently, we have seen new stem cell research, gene therapies, as well as new drugs for dry and wet macular degeneration. In January of this year, there was an article in the journal, Cell Death and Disease, that looked at cell apoptosis, specifically with the photoreceptors of the eye. (Read the article here ). Apoptosis is the genetic programming of deliberate and constructive cell death, allowing for the maintenance of healthy structures and systems in the body. Some estimates have the body replacing 50 to 70 billion cells daily by this process. Necrosis, on the other hand, is unplanned cell death caused by injury, toxins, or other negative outside factors; this causes inflammation and disrupts the body’s balance of things. There are stressors that speed up cell turnover. The study looked at photoreceptors in the retina and were able to demonstrate cellular recovery, even in late stages of apoptosis, recovery not breakdown. When certain stressors were reduced, by working with the mitochondria, there was recovery of the photoreceptor cells. How? Mitophagy, the mitochondria’s own process of programmed breaking down and then repurposing the recycled components for new ones. This mitochondrial repair helps to reverse the sequence of apoptosis for the photoreceptors. Mitochondria, how cool. How is this helpful for our eyes? Conditions like retinitis pigmentosa or macular degeneration directly involve the photoreceptors and may be slowed or reversed by helping the mitochondria. So, let’s take care of those mitochondria. There is some evidence for nutritional support for the mitochondrial system. The nutrient, Urolithin A (UA), which is a compound made in our gut from fiber found in pomegranates, berries, and nuts is the only clinically proven substance known to trigger mitophagy, made in the gut no less. Vitamin B3 is critical for mitochondria function, however vitamin B3 based supplements are still to be clinically tested for their support of cell recovery. Nutrients Coenzyme Q10 and L-carnitine are known to help the mitochondria generate energy, and interestingly, infrared light therapy has also been shown to benefit mitochondrial function. Again, food for thought. The gut and its function needs a lot of research. How do probiotics and nutrient precursors affect eye tissues? It is so interesting that the gut can be a factor in eye health. Maybe adding Urolithin A as a supplement is wise, along with the antioxidants in Lutein and Zeaxanthin we use to combat photoreceptor degeneration. Will keep you posted on any new developments.  The good doctor
By Dr. Mark Germain April 16, 2026
The good doctor focuses in on visual processing. Why do we miss things that are right in front of our eyes?
By Dr. Mark Germain April 10, 2026
The good doctor discusses the Artemis II mission, space travels affects on the eyes, and "the dark side of the moon"
By Dr. Mark Germain April 3, 2026
The good doctor discusses exciting new and emerging options to treat nystagmus.
By Dr. Mark Germain March 27, 2026
The good doctor reflects on The Country of the Blind, a book by Andrew Leland which gives insight into the experience of vision loss.
More Posts