Category Miscellaneous

We often look up at the night sky and wonder: Where is everyone? If the galaxy is billions of years old, shouldn’t it be teeming with noisy civilizations? This is the famous Fermi Paradox.

But there’s a counter-theory gaining traction among astronomers and SETI researchers. Maybe the galaxy isn’t silent. Maybe it’s just whispering on a private network we haven’t plugged into yet.

Instead of broadcasting radio waves into the void like a megaphone, advanced civilizations might be using a highly efficient, laser-based “Galactic Internet.” And the most exciting part? We might have the technology to spot the blinking lights of their routers right now.

The Legacy of Claudio Maccone (1948–2025)

To understand how this network could work, we have to look at the work of the late Italian mathematician and physicist Claudio Maccone, who passed away in August 2025 and who I interviewed several times (Youtube video).

While Einstein predicted in 1916 that gravity could bend light, it was Maccone who, after hearing the idea from Frank Drake at the SETI Institute, spent decades rigorously proving how a space mission could actually exploit this. He championed the FOCAL (Fast Outgoing Cyclopean Astronomical Lens) mission concept, demonstrating mathematically that every star acts as a massive antenna.

Maccone showed that if you place a spacecraft at a specific distance behind a star – a sort of “focal point”, if you will – the star’s gravity will focus signals toward the other side, amplifying them by billions of times. This “antenna gain” turns a modest laser pointer into a lighthouse capable of crossing the galaxy.

Credit: SETI Institute

Why Aliens Would Choose “Red” Routers

For our Sun, Maccone calculated that this focal point starts at roughly 550 Astronomical Units (AU)—about 14 times the distance to Pluto. That is a difficult distance for us to reach.

However, Maccone’s math represents an average for all stars. If you run the numbers for M-dwarfs (red dwarfs), the results are startling:

• They are everywhere: M-dwarfs make up 75% of the stars in our galaxy.
• They are compact: Because M-dwarfs are smaller, the physics of gravity works in their favor. The focal point for a typical red dwarf is only ~247 AU.

This is the sweet spot. It is much easier to park a relay satellite at 247 AU than 550 AU. If there is a Galactic Internet, the “cables” likely run through these red dwarf systems.

This table shows the “focal point” distance for different spectral type stars. The last row represents a mid-M dwarf, also known as a “red dwarf.” These stars have the advantage of a smaller focal distance.

The “Invisible” Flash

Here is where it gets interesting for us on Earth.

M-dwarfs are very dim. To a small telescope or a wide-field instrument like LaserSETI, most of them are completely invisible, hidden by the darkness of space.

If a relay satellite parked around one of these invisible stars fires a laser beam at its next target, and Earth happens to drift through that beam, we wouldn’t see the star getting brighter. We would see a bright flash appearing out of nowhere in empty space.

Calculations suggest that with the magnifying power of the “star-lens”, the alien transmitter would only need a pulse energy similar to a modern terrestrial capacitor bank (roughly 40 kilojoules) to appear as a bright “star” to us for a split second.

Two of the LaserSETI instruments in Isla Magueyes (UPR at Mayaguez Department of Marine Biology) in Puerto Rico. 

How LaserSETI Can Crack the Code

So, how do we distinguish an alien laser flash from a random cosmic explosion? This is exactly what the LaserSETI project is built to do.

LaserSETI is a global network of cameras watching the entire sky, all the time. But unlike normal cameras, these have a special prism (a transmission grating) over the lens.

This prism is the key detection tool:

1. Nature makes rainbows: If a natural object (like a flaring star) flashes, the prism spreads its light into a rainbow streak, because natural light contains many colors.
2. Aliens make dots: A laser is “monochromatic”—it is exactly one color. The prism cannot split it.

If LaserSETI captures a flash from one of these M-dwarf relays, the image won’t show a rainbow. It will show two distinct, sharp dots (the original spot and its “ghost” created by the prism) appearing where no star was previously seen.

This graphic shows how the “prism” splits natural light into rainbows, whereas a monochromatic alien signal would appear on LaserSETI detectors as only two dots.

The Verdict

If a Galactic Internet is out there, we may be like fish swimming through the ocean, unaware of the undersea cables carrying vast streams of information around us. The data may be flowing right past us — gigabytes of history, science, and art from a thousand worlds and even their own AI. 

Thanks to the foundational work of visionaries like Claudio Maccone and Frank Drake, we now know exactly where to look. We just need to wait for the flashes in the dark that refuse to turn into rainbows.

References & To Know More

If you want to dive into the math and physics behind the “Galactic Internet,” here are the primary sources that shaped this theory:

• The Blueprint:
  • Maccone, C. (2009). Deep Space Flight and Communications: Exploiting the Sun as a Gravitational Lens.
  • Why read it: This is the “bible” of the concept. Maccone provides the mathematical proof that the Sun (and other stars) can be used as massive antennas.
• The Network Architecture:
  • Hippke, M. (2020). Interstellar Communication Network. 
  • Why read it: Hippke expands the idea from a single link to a full galactic web, analyzing why routing data through stars is more energy-efficient than direct beaming.
• The “Invisible” Target:
  • Turyshev, S. G. et al. (2020). Direct Multipixel Imaging and Spectroscopy of an Exoplanet with a Solar Gravitational Lens Mission. (NASA/JPL)
  • Why read it: While focused on us looking out, this paper confirms the “100 billion” amplification factor that makes the whole concept possible.
• The Detectors:
  • The LaserSETI Project (https://laserseti.net/)
  • Where to look: Visit SETI.org/LaserSETI.

Why visit: You can see the actual instruments being deployed to watch the sky for these flashes. The site explains the “spectral grating” technology in simple terms.

A message from our Director of Education, Pamela Harman:

Science is Elementary is seeking donations for donations for the production and distribution of Science is for Me! STEM kits – to children who have lost their homes and schools.

I have spent time as Volunteer with the organization and attest to the quality educational value of their kits.

This is one of many appeals for the LA Wildfire Relief efforts worthy of your consideration.

Dear friends,

In response to the devastating fires in Los Angeles, Science is Elementary is sending our entire inventory – approximately 10,000 Science is for Me! STEM kits – to children who have lost their homes and schools. These kits provide a vital opportunity for learning and discovery, helping to create a sense of normalcy and learning continuity in the midst of such distress.

Our kits are highly popular because they are fun and engaging for kids, which they could use right now, while integrating literacy and other essential skills to provide high-quality science education. They are especially convenient for remote learning since each kit includes a storybook and the materials needed to conduct the experiments.

The need is far greater than our current inventory can serve. To meet the growing demand, we are reaching out to our dedicated community for your support. Your donation will help us produce and distribute more kits, ensuring that every child impacted by the fires has the chance to explore, learn, and stay engaged.

We truly appreciate your continued support. With your help, we can make a lasting impact in the lives of these children and help them find some stability and joy.

Thank you for being part of this important effort. 

Warm regards,
Tzipor and the entire SiE team

It is a sad day indeed to share the news of William (Jack) Welch’s passing. I won’t duplicate here his achievements and awards, list his papers, nor attempt to wax poetic about his outsized contributions to the fields of radio astronomy and SETI. That’s all here and here.

What I’d like to add is that he was a wonderful person. As you can see from the picture below, he always had a smile, kindness, warmth, fun, and positive energy to share. He had the soul of an explorer, realistic yet indefatigable.

We’ll miss you, Jack.

Eclipses are one of those things that are easy to assume they’ve been around and will always be around. But no. While the Anthropic Principle guarantees the universe must be sufficiently fined tuned for us to exist, there’s nothing which requires us to be alive during the “Golden Age of Eclipses.”

So we’re just lucky. I like to think about what other wonders are there to be appreciated: nearby, on our planet, elsewhere in our universe. They must be uncountable.

Happy holidays to all and please enjoy as many wonders as you can!

We just became aware of an ET advisory in the FEMA app, and thought it was important to share! 😉

One of my favorite aspects of SETI work is the scientific breadth required. While no one can be an expert in everything, every corner of human knowledge has the potential to affect SETI theory or practice.

So while this video does discuss spectroscopy, I hope you’re now in the muod for some mind-bending atomic chemistry that’s admittedly only peripherally related to LaserSETI.

After watching the video, in case you’re wondering: yes, it technically is an isotope of hydrogen since its atomic number is the same. Its nucleon count, however, is zero. If that seems odd, just wait, it gets better. Since there’s a third type of lepton, there’s not one but two hydrogen isotopes of nucleon count zero. 🤯

If your head is hurting by this point, perhaps you should drink a nice, cold glass of dihydrogen monoxide.

And not the cartoon kind! 🐦💫 The Bay Area isn’t done with rain storms, and this definitely isn’t a great observing night by any standard, but it’s so nice to see stars again. It’s been weeks!

The news isn’t quite as good from Haleakala, unfortunately. Hawaiin Telecomm repaired the fiber, decided they needed to redo it, redid it, and yet we still haven’t made Contact with the instruments. Checking multiple times per day hasn’t seemed to help. Something about a “watched kettle never boils” I think?

It’s still Dec 13st here on the West Coast, and we’re hoping the New Year brings better luck and better skies for LaserSETI and a wonderful 2023 for each and every one of you!

We’ve had a lot of rain in California recently. I can’t remember the last clear night we’ve had. I was excited because the astronomer’s forecast was (and still is) good for tonight, but there must be valley fog or something else low in the sky that it’s blind to. The only photons making it to the instruments tonight are from our Sun, bounced off our lovely but obscured Moon.

And, you might’ve noticed, it’s been a long time since even the PiCams have updated from IFA on Haleakala in Maui. Almost two weeks ago now, there was a large ice storm which knocked out power. You can still see the frost on the instrument windows just before they went offline on the Status page. On Tuesday, we got power back, but only to find there was another internet cable cut somewhere halfway up the mountain, so we’re still without connectivity to the instruments.

It can be easy to get frustrated when things don’t go your way time after time, but I think that’s shows something special about the holiday season and New Years. Everyone wishes things were better, and that’s natural, that’s how we keep making progress. But we all have a million things to be grateful for, to appreciate how we got where we are and what or who is going to help us keep going tomorrow.

So let’s focus on what’s great in the world and in our lives, and leave some greatness to achieve in 2023!

Yesterday, the SETI Institute hit its goal of raising $10,000 for our projects that search for life beyond Earth, succeeding on a challenge grant from long-time SETI Institute supporter Fritz Demopoulos. Now he has extended the September Challenge by $2,500!

There are only two days left to unlock a $12,500 gift for LaserSETI and its siblings. If you donate before Oct 1, your gift will go twice as far. A gift of any size helps the search!

LaserSETI would like the sympathize with all of the humans experiencing a heat wave today.

We spent a long time refining the thermal protection system for the instruments. Internal circulation, special heat-shedding paint, multiple exhaust fans, sunshades with embedded mirrors to reject even more heat. Days like today prove the value of that investment.

It’s 44 C (112 F) right now at Ferguson Observatory (RFO) and the cameras are the hottest I’ve ever seen them: 61 C (142 F)!

For comparison, the cameras on top of Haleakala, Maui (IFA) are a cool 16 C (61 F) right now.