Occasionally, when the ‘seeing’ is good, I pull out my big gun optics pointing them toward the Jovian Moon system. There are many more moons around Jupiter than are on this image. These four however are the easy ones. The little 12 inch diameter optic I used for glass here is not up to the task unless I do much longer tracking time exposures. A 12 inch light gathering ability makes it faster than catching the same image with a smaller aperture. I have also found that higher resolutions cameras give you higher resolution images lol. This is an effective 4800mm focal length.
The year was 1609 and a fellow by the name of Galileo Galilei pointed a primitive Duch made gadget up at the massive Planet. Looking through the pieces of glass mounted like a skeletonized tube. Galileo was important in the early development of the telescope as he taught himself to grind glass to build his own instruments. He notices that 4 “stars” were circling Jupiter. Humm. That single observation set in motion the Brilliant mathematical mind that man possessed. He was obsessed with the new telescope working tirelessly to improve the state of the art. In 1609, he was observing an 20X view that the human eye could achieve. That is similar to a 24 power rifle scope. I can’t imaging observing this with less than a 1200 mm focal length and a 6 or so inch aperture. Let alone a rifle scope. Better than naked eye though in use before the improvements by Galilei lol.
There are infinite possible stories about this 25 second time exposure with a very wide 12mm lens. I cropped the darker sides off to give it a square aspect to 18″.
According to NASA, this location (if we turn off our compounds lights which are the blue Stadium LED’s we use for our place) is as dark as the North Atlantic Ocean. Certainly ranking up there for dark skies here at only 4000 feet. The Milky Way spiral arms exist every night. Even above you folks living lower or near population. It’s amazing our eyes can discern most of this but the sensitivity of these modern cameras is just tremendous. It just takes a lot of shutter time to catch it.
As you might have assumed, the twin Blue Glows over my signature are our ranch compound lights as seen from two miles away and over the high ridge between us. The orange glow is a proper exposure of the light pollution from Gillette Wyoming. What an interesting perspective from so far away. I’m parked in Montana with Gillette being some 60 crow miles south of me. The light pollution of all the sodium lights there causes the flow. It’s very faint but the longer exposures will bring out colors well. For those that like star colors, many are in this shot. The Comet Neowise was way over my shoulder at the same time naked eye visible.
You can clearly locate yourself with this one. Sagittarius the Teapot is the low constellation down in the light pollution. Just pouring some tea I think. Jupiter is the bright Planet. Saturn is the less bright planet to it’s left. On the full sized file I have you can clearly see the moons around Jupiter. This reduced resolution social media .jpg has nothing on the 200 times bigger original file. There is just a SLIGHT star motion track on this pushing the envelope for the lens I was using.
Jupiter and Main Moons with a bit of intentionally blank space … Excuse the text…
Galileo Galilei has made Many Contributions to science but one of the biggies was the discovery of 4 moons/satellites orbiting the bright Planet Jupiter. Galileo observed that the “stars” moved along with Jupiter in the sky. Seemly carried along with the bigger/brighter star. The moons were all lined up like ducks in a row. Just a week ago in 1610, he was gazing through an “astronomic instrument” . He had noticed those “stars moved apparently around” Jupiter. Several noted historically famous astronomers were enjoying the new fangled contraption. We call it a telescope. They failed to receive credit because Galileo’s work was more precise and accurate, he got the glory.
This arrangement is the worlds largest clock “on the wall” literally. Those moons move like clockwork. Galileo discovered this phenomena. Jupiter Moon time schedules in the form of books remained in use for hundreds of years. By looking at where the moons of Jupiter emerge or disappear. You can literally tell a good accurate time for use in navigation on ships. This works on Land too with Lewis and Clark using Jupiter and it’s moons to tell the exact time. They were in a sea of grass but the sextant works every bit as well there. You need to know the exact time to properly use a sextant to determine your position on the globe.
In this photo, I timed it for Europe just emerging from behind Jupiters shadow at that precise moment of time. Then I could have taken a sextant to give me Latitude and longitude. The sextant is used to measure angles between the horizon and astronomic objects.
“Thunderhead Lit Up Trailing Stars” is a time lapse photo on a tripod set up under my deck. All the lighting you see is ambient inside our “compound” from various yard lights mulitiplied over 10 seconds…. The storm is a 500 microsecond lightbulb flash giving me lit clouds from within. As the storm travels, it’s leaving stars in it’s wake in the pure dark sky. Got em!
This is not a composite in fact the bright star is actually a planet… Jupiter. The flash was instantaneous but the stars needed the time exposure and the results fit like a glove📸. About 10 seconds at ISO 300 with f6 (ish) should get you here if you have a tripod, and a storm that leaves stars in it’s wake… Hint…. Longer than about 12 seconds gives you streaky stars…..