The Week the Sky Changed Seasons

Watcher’s Log — September 20–26, 2026

🌙 SKY

This was the week autumn officially arrived.

The September equinox occurred on September 22, marking the astronomical beginning of fall in the Northern Hemisphere. From here, daylight continues shrinking as Earth moves deeper into the season.

Node 35 didn’t need an astronomical calculation to know something had changed.

The evidence was already accumulating: earlier darkness, cooler air, wind moving differently through the trees—and this week, an atmosphere that refused to sit still.

The photographs told the story better than a forecast could.

One moment, the nearly full Moon burned through openings in dark clouds, illuminating their edges and turning the treetops into silhouettes. Another frame caught enough lunar detail to bring the surface back through the glare.

Then the sky changed completely.

A faint rainbow stretched over the backyard beneath a pink-violet sky. Later, the western horizon erupted orange beneath layers of purple and blue cloud.

None of it required an anomaly.

Water droplets, sunlight, cloud structure, changing angles and an observer standing in the right place were enough.

And the week isn’t finished with the Moon yet.

Tonight, September 26, the Harvest Moon rises near Saturn, with much fainter Neptune completing a broad triangle. Saturn is visible without optical aid; Neptune, at roughly magnitude 8, requires binoculars or a telescope.

The timing is almost obnoxiously appropriate.

Just as the Harvest Moon arrives, a powerful nor’easter is affecting the East Coast, bringing the threat of damaging winds and coastal flooding, including impacts around Long Island.

So the brightest Moon of this particular seasonal threshold may spend part of its appearance behind clouds.

It still counts.

🌍 EARTH

This week produced an unusually appropriate story about what happens when observation becomes a long-term practice.

The Hubble Space Telescope completed its 200,000th orbit around Earth on September 19.

During 36 years in space, Hubble has traveled more than 5 billion miles around Earth and made more than 1.7 million observations.

But the interesting part isn’t simply the number.

Hubble is currently returning repeatedly to the same region of space, waiting for a supernova called Athena to appear again.

That sounds impossible until gravitational lensing enters the story. A massive galaxy cluster between Earth and the supernova bends its light along different paths. Those paths take different amounts of time to reach us, allowing astronomers to potentially observe separate appearances of the same explosion months or years apart. Athena is predicted to reappear sometime between now and early March 2027. Measuring the delay could help scientists map the foreground cluster and refine measurements of cosmic expansion.

In other words:

returning to the same place is part of the experiment.

Another new watcher was approved this week.

NASA selected PRIMA, a proposed far-infrared space telescope, to advance into the next development phase. If confirmed through later reviews, the mission is targeted for launch in 2033 and would investigate cold dust, planetary systems, star formation, galaxies and black holes using wavelengths that reveal parts of the universe other observatories cannot easily see.

One instrument has watched for 36 years.

Another is being designed because there are still things we haven’t learned how to see.

🔺 NODE 35

This is where changing the Watcher’s Log from daily to weekly immediately makes sense.

Because viewed separately, these were photographs.

Viewed together, they became a record.

Moon.

Cloud.

Darkness.

Light.

Rainbow.

Sunset.

Storm approaching.

Season changing.

The same trees appear repeatedly in the foreground. The same yard stays underneath it all. Node 35 remains fixed while everything above it changes.

And that fixed point matters.

A daily Log could have forced each moment to become its own story.

The weekly record shows something more interesting:

the movement between them.

The Moon didn’t merely appear.

It emerged, disappeared behind cloud, illuminated the atmosphere around it and returned through another opening.

The rainbow wasn’t the story by itself either. It belonged to the same unsettled atmosphere that produced the clouds, changing light and extraordinary sunset—and is now giving way to a coastal storm.

This is why the Watcher’s Log doesn’t need to document everything anymore.

The photographs already did the observing.

The Log only has to notice what the observations reveal when they’re finally placed beside one another.

And this week they reveal something very simple:

Earth put on one hell of a show before the weather arrived.

📡 SIGNAL

You don’t have to record every day to keep a record. Sometimes distance is what finally lets you see the pattern. 🔺

Field notes from a planet worth paying attention to.