October 31st, 2017, 9:00 p.m. local time
Ghostly clouds and autumn leaves bring you tonight’s Moon on this last day of October.
October 9th, 2017, 9:45 a.m. local time
On Monday, the Moon was still out well into the morning, but setting towards the horizon in a clear, blue, and near-empty sky. These early Waning phase days are a reminder that astrophotography can be done all day and all night. Granted, your targets during the day will be three at most (Sun, Moon, Venus), but the pursuit is nonetheless possible.
From my vault of unpublished astrophotography, today I bring you a rendition from earlier this year of the constellation Scorpius. I had been meaning to process this one for a while. Days turned into weeks which turned into months. An eclipse got in the way somewhere along the journey. So here we are, mid-October, discussing a constellation normally thought of in the Summer.
I recall that it was still very early evening when I took the photographs which comprise this stacked image. As you can see, my view was a tad narrow, but you can easily make out the side of Scorpius anchored by Antares. To the top-left are two moderately bright stars, part of the constellation Ophiuchus. If you imagine a horizontal line from the bottom of those stars in Ophiuchus to the top stars in Scorpius, then you are envisioning the Sun’s elliptic path in the sky.
October 4th, 2017, 9:30 p.m. local time
Last night was “Full Moon night.” The Moon passed from its prior Waxing phase and is now in its Waning phase, were it shall remain until the next New Moon.
When is the Moon truly full? If you look at my image above from last night, taken with my digital camera, you may believe this is a Full Moon. But it is more likely a 99-99.9% Waxing Gibbous. How can you tell? Notice on the right side how there is a thin circular line along the circumference of the Moon’s edge. This indicates the direction of the Sun relative to the Moon as seen from my location on Earth. Now look at the left side and note the absence of that circular line. Instead, on the left you still see the shadows of craters at the extreme edge of our viewing range.
At some point last night, yes the Moon went fully Full and the line traced a complete circle. That is your real Full Moon. Tonight, that circular line will now be on the left side with crater shadows visible on the right.
Someday I hope to capture a true Full Moon. Its appearance is relative every Moon cycle, so instead of relying on luck, whenever I have more time I will look up the exact UTC time and be ready to photograph at that moment.
(I) Light Pollution is pollution.
(II) Light Pollution is among the least-understood and least-recognized forms of pollution.
(III) Most people do not know what Light Pollution is.
(IV) Light Pollution distorts the Earth’s natural night sky.
(V) Light Pollution’s distortion on the Earth’s night sky, by extension, distorts the Earth’s natural environments.
(VI) Science has accumulated sparse evidence of the environmental impacts of Light Pollution.
(VII) The accumulated scientific evidence to-date is insufficient to awaken the general population to the existence of Light Pollution and its impact on Earth’s environments.
(VIII) Light Pollution is a recent phenomenon in human history.
(IX) Light Pollution is artificial.
(X) Moonlight is not Light Pollution, but part of the Earth’s natural environment that evolved over billions of years.
(XI) Humans and most non-nocturnal animals have difficulty sleeping under artificial light, preferring the dark of night.
(XII) Light Pollution directly inhibits terrestrial stargazing and other astronomical pursuits.
(XIII) Light Pollution lessens children’s curiosity about the night sky, stunting their desire to learn and imagine.
(XIV) Light Pollution severs mankind’s prime connection for wondering about the cosmos.
(XV) The intended direction of nearly all artificial night lighting is down.
(XVI) Most artificial light illuminates in all directions (down, up, sides).
(XVII) Artificial light that illuminates outside of its intended range wastes energy.
(XVIII) Artificial light that illuminates outside of its intended range may be an encroachment onto surrounding lands and properties.
(XIX) Light Pollution is caused by artificial illumination of the night sky.
(XX) Light Pollution will never be eliminated completely from civilized locations, but it can be greatly mitigated.
(XXI) Light Pollution can be reduced with no impact to quality of life and security.
(XXII) Light Pollution can be significantly reduced by shielding all outdoor lighting to focus illumination on the intended ground target.
(XXIII) Shielded lights make nighttime visibility easier by reducing harsh bulb glare.
(XXIV) Light Pollution can be significantly reduced through the use of timers and motion sensors.
(XXV) All commercial and home decorative lighting should point downward with bulbs or diodes shielded on their sides.
(XXVI) Most Light Pollution comes from street lights.
(XXVII) Newer LED lights contribute far more to Light Pollution than the older, traditional sodium streetlamps. This is because newer LED diodes blast light across almost the entire visible light spectrum, whereas the older sodium lamps emitted light at a very narrow yellow band within the visible spectrum.
(XXVIII) Newer LED lights are OK for outdoors but should be low-intensity, shielded, and ideally triggered by motion sensors.
(XXIX) Blue light is the worst light for outdoors because the Earth’s atmosphere absorbs blue spectrum light the easiest. Think of the daytime blue sky!
(XXX) Images from space of the Earth’s ground illuminated at night were once evidence of progress, but now should be viewed as evidence of our collective ignorance about Light Pollution and not understanding how to lessen its impacts on the Earth’s environments.
I don’t normally concluded my posts with “please share/retweet/reblog/etc.” requests, but if you feel better informed of and aware on the topic of light pollution, please forward this to your friends and neighbors. Spreading knowledge about light pollution is the best strategy for eventually solving the problem!
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