For over two decades, visual observers and astrophotographers have relied on the Bortle scale to gauge sky quality. But let’s be honest—estimating light pollution based on general visual cues leaves far too much guesswork on the table. It’s time to say goodbye to the limitations of the classic Bortle system.
Welcome back to the Blog! Today, I’m excited to introduce the Sky Performance Index (SPI)—a comprehensive, precision-driven system designed to give observers an exact, objective measure of what the sky is actually giving you on any given night. By combining real surface brightness readings with real-time atmospheric conditions, the SPI gives you a true picture of observational potential. Let’s break down why the Bortle scale falls short and how the SPI system will revolutionize how you log, plan, and evaluate your dark-sky observing sessions
For the introductory report and to get the Google Sheet so you can play with SPI, head over to Eadsy Astronomy at this LINK.
What is going on with Betelgeuse? Orion’s famous red supergiant is acting up again, leaving astronomers and stargazers asking the same big question: is this routine variable star behavior, or are we witnessing the final countdown to a massive cosmic explosion?"
Welcome back to the channel! If you’ve stepped outside lately and looked up at the familiar hourglass shape of Orion, you might have noticed its bright right shoulder looking a little different. Ever since the historic Great Dimming event, all eyes have been fixed on Betelgeuse—and right now, it’s giving us a brand-new show.
In this video, we’re diving into the latest observations, unpacking the science behind its strange brightness fluctuations, and looking at what’s really happening inside this massive, pulsating monster.
Before we jump in, make sure to hit that subscribe button, ring the bell, and let me know in the comments: what does Betelgeuse look like from your location tonight? Let's dive in!
Full article is available over at Eadsy Astronomy LINK.
ver set up your telescope on a clear night only to find planetary details completely washed out, or attempted deep-sky imaging only to be left with gray, contrast-less backgrounds? The secret to avoiding wasted sessions comes down to understanding two critical atmospheric conditions: Seeing and Transparency.
In this video, we break down the fundamental differences between seeing (atmospheric stability) and transparency (atmospheric clarity), how each affects your stargazing and astrophotography, and quick tests you can perform with your naked eye or through the eyepiece before setting up!
Key Takeaways:
Atmospheric Seeing measures the steadiness of the air. High seeing stability is crucial for high-magnification planetary, lunar, and double-star viewing.
Atmospheric Transparency measures how much light passes vertically without being scattered or absorbed by moisture and aerosols. High transparency is essential for observing faint deep-sky objects like galaxies and nebulae.
The Pickering Scale (1–10) rates seeing based on how intact a star's Airy disk and diffraction rings remain under high power.
The Antoniadi Scale (I–V) rates seeing from I (perfect, motionless) down to V (severe, constant distortion)
For the full article head on over to Eadsy Astronomy! LINK
If a competition were held for the most unrecognized genius of 20th-century astrophysics, the winner would undoubtedly be the Swiss-American astronomer Fritz Zwicky. A bold, visionary scientist who was decades ahead of his contemporaries, Zwicky formulated foundational theories on supernovas, dark matter, neutron stars, gravitational lensing, and cosmic rays. Yet despite his astonishing intuition, his abrasive personality and radical ideas led his peers to dismiss him for decades, leaving him one of the most underrated figures in the history of science.
The YouTube video covers a lot of the article I wrote since some prefer to listen instead of ready. You can read the full article over at Eadsy Astronomy LINK.
In reading the article,"Green, Pink, and Purple—Astronomers reveal the surprising two colors of white dwarf stars." we find that a group of astronomers from the University of Warwick have shown that a white dwarf star can glow really in a whole variety of colors, including the first star that we ever found that if we could see it with our eyes, but actually appeared green. It's really cool.\
Most stars' color is a guide, really, to their temperature. Cooler stars will look orange, stars like our Sun will look white and the hottest stars—they're going to glow a pale blue.
It's kind of like a blacksmith's iron-glowing red, then orange, then white-hot as it heats up. That's the analogy they use in the article. White dwarf stars: the dense remnants left behind when sun-like stars reach the end of their lives, were thought to follow the same kind of rule.
They earned their name because the earliest examples found they were surprisingly hot and glowed this white, pale blue. So astronomers called them white dwarf stars.
But the real question that this paper answered: are orange, white, and blue the only colors a star in the night sky can be, especially a white dwarf? So the answer they found, and what they quote here, is most stars—including white dwarfs—behave like perfect radiators, so their color is set almost entirely by temperature.
But nobody had really looked into what else might be possible for white dwarfs, said Dr. Mark Hollands, Prize Fellow in the Astronomy and Astrophysics Group, University of Warwick, who led this work.
And turns out, he said, "that these incredibly dense stars can produce colors nobody detected and some of them generally surprised him."
So why do white dwarf stars break the rule? Watch the video or go over to Eadsy Astronomy at the link below to learn more!
As always I have an article on this over at Eadsy Astronomy and a link to the article and paper over there so head on over. Please subscribe to Eadsy Astronomy if you want notificaiton of my items I share as it always is there first. If you find value in this, please consider becoming a contributing member. It helps to offset some of the apps and other resources I use to share this. As always, the content is and will remain free.
This is a REALLY cool site if you are an amateur or wanting to know when you can see the Milky Way or if you can from a certain locaiton. It explains what the Moon Phases are, what the Dark Window is for observing or imaging and when to focus on that. It also shows you the New Moon dates and windows for 2027!
There is so much here and in the video I touch on it. Over at Eadsy Astronomy I did a full article on it with more images and information so head on over there and take a look. I also have the link to the site and its pages there.
If you find it helpful remember you can join Eadsy Astronomy at Paetron and become a member. You can be a free member or if you find value in what I share become a contributing member at $3 or $5 a month. The money just goes to offset some of the costs for apps and software and other things I use to bring this to you.
Also here on YouTube hit the like button, and subscribe! If you do or have thank you so much as it helps a niche site like mine to grow.
For the full article which has a lot more than the video on this site, head over to Eadsy Astronomy for the LINK to the site and for my article on it!
