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3I/ATLAS — THE WOW! SIGNAL CONNECTION AND ORIGIN ANALYSIS

Avi Loeb's calculation that the Wow! Signal may have come from 3I/ATLAS

Created: July 21, 2026

THE LOEB CALCULATION

Source: "Was the Wow! Signal Emitted from 3I/ATLAS?" — Avi Loeb, September 28, 2025

The Coordinates

The Distance

The Frequency

The Power

The Implication

3I/ATLAS was already inside our solar system (600 AU, in the Oort Cloud region) when the Wow! Signal was detected. The signal could have been transmitted FROM 3I/ATLAS itself, not from a distant civilization.

The Wow! Signal was not a broadcast from 1,800 light-years away. It was a transmission from an object already at our door, 600 AU out, on the hydrogen line frequency, at nuclear reactor power levels, arriving at Earth 3 days after transmission.

3I/ATLAS then continued inward for 48 years before being discovered at 4.5 AU on July 1, 2025.

THE TRAVEL TIMELINE

From 600 AU to Earth

From Various Origins to 600 AU

At 60 km/s, time to travel to 600 AU from different starting distances: - From 1 ly (63,241 AU): ~5,000 years - From 10 ly: ~50,000 years - From 100 ly: ~500,000 years - From 1,800 ly (Wow! Signal candidate star): ~9 million years - From 26,000 ly (Galactic Center): ~130 million years

3I/ATLAS Speed at Perihelion (M's "151k")

WHERE 3I/ATLAS CAME FROM

Direction

Origin Environment

What We Don't Know

What's in the Sagittarius Direction

3I/ATLAS would have passed through (or near) countless star systems on its journey from wherever it originated to our solar system. Without knowing the exact origin distance, we cannot trace the specific path. But the direction toward the Galactic Center means it came from the densest part of the Milky Way — the region with the highest concentration of stars.

THE SWAN QUESTION

Was SWAN Hidden Behind the Sun?

YES. Confirmed by Loeb: "It originated from the direction of the Sun relative to Earth, explaining why it was not spotted earlier. Between August 8 and September 13, 2025, it was within 30 degrees from the Sun, too close to the Sun for most telescopes to observe it."

SWAN was within 30° of the Sun for 5+ weeks. It was only discovered on September 11, 2025, when it emerged from solar conjunction. Its perihelion was September 12 at 0.5 AU — half the Earth-Sun distance, very close to the Sun.

Did SWAN Chase ATLAS?

No — they came from different directions: - SWAN: from Aquarius constellation - 3I/ATLAS: from Sagittarius constellation - Separated by tens of degrees on the sky

BUT — in late September/early October 2025, both displayed sunward anti-tails that appeared to point at each other through the Sun. This was a geometric alignment, not a physical connection. SWAN is an Oort Cloud comet on a 286-year orbit (Loeb says 840 years per other sources). 3I/ATLAS is interstellar.

SWAN Orbital Details

How SWAN's Interstellar Status is Verified

  1. Barycentric orbit calculation: integrate orbit backward to before planetary region entry
  2. Inbound barycentric eccentricity < 1 = bound to Sun (Oort Cloud)
  3. v_infinity ≈ 0 before entering planetary zone = Solar System origin
  4. SWAN: e = 0.9942, clearly elliptical, 286-840 year period

The blind spot issue: SWAN was hidden behind the Sun for 5+ weeks. It was only visible via the SOHO/SWAN instrument (which observes in solar conjunction geometry). A ground telescope cannot see through the Sun. SWAN was detected because the SWAN instrument on SOHO looks at the sky around the Sun — it's designed for this.

The question of whether SWAN could be interstellar despite the official classification: the barycentric calculation is robust for SWAN because it has no significant non-gravitational acceleration (unlike 3I/ATLAS, which shows anomalous trajectory deviations). SWAN's orbit is well-determined over a long arc. The classification is solid.

THE POSITION DISCREPANCY

October 21, 2025

Perihelion Timing

The arxiv Contradiction

An arxiv paper (2510.25035) states: "No offset in the comet's observed position could be distinguished from the [predictions]"

This directly contradicts EarthExists's documented 15.4 arcminute offset. Either: 1. The arxiv paper uses different observational data 2. The offset was corrected in later orbital solutions (JPL updated predictions after October 21) 3. The position discrepancy was transient and resolved 4. There is active disagreement about whether the offset is real

SUMMARY: THE REFRAMED NARRATIVE

If Loeb's calculation is correct:

  1. 3I/ATLAS was at 600 AU in August 1977
  2. It may have transmitted the Wow! Signal on August 12, 1977
  3. The signal arrived at Earth on August 15, 1977 (3 days light travel)
  4. 3I/ATLAS continued inward for 48 years
  5. It was discovered July 1, 2025 at 4.5 AU
  6. It toured Mars → Sun → Venus → Earth → Jupiter
  7. At perihelion it was traveling at 152,300 mph (68 km/s)
  8. It came from the direction of Sagittarius/Galactic Center
  9. It originated in a very old, cold, carbon-rich environment
  10. Travel time from 1,800 ly: ~9 million years
  11. But it was already at 600 AU in 1977 — so it entered our solar system thousands to millions of years before that

The Wow! Signal was not a distant civilization. It was a visitor already at our door, announcing itself on the hydrogen line, at nuclear reactor power levels, 48 years before we discovered it.

Analysis: July 21, 2026 Sources: Loeb "Was the Wow! Signal Emitted from 3I/ATLAS?" (Sep 28, 2025), Loeb "The New Comet SWAN" (Sep 15, 2025), EarthExists tracking article (Oct 22, 2025), Smithsonian, NASA, ESA, arxiv Status: Active Research

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