Answer · Wow! signal
A sudden maser-like or superradiant brightening of a small cold interstellar hydrogen cloud, triggered by a…
A sudden maser-like or superradiant brightening of a small cold interstellar hydrogen cloud, triggered by a transient such as a magnetar flare.
Where it stands
Still possibleIts tests haven't settled it: two pieces of evidence for, two against. It needs two reviews to be accepted.
What it predicts
- Cold hydrogen clouds producing weak narrowband signals exist along the Wow! line of sight.
- Similar flares occur elsewhere on the sky at low rates and are found by sensitive hydrogen-line surveys.
- The signal's frequency corresponds to a plausible Galactic radial velocity.
What would rule it out
- A repeat with a line narrower than any thermal or maser process, or with modulation; or surveys showing no such flares anywhere over long exposures while finding the required clouds.
Evidence 2 for · 2 against
FOR
FOR
AGAINST
The questions it answers
Open5 answers, none ahead
Cite it
Mysteries Department. (2026). A sudden maser-like or superradiant brightening of a small cold interstellar hydrogen cloud, triggered by a… [Answer ANS0CXZ4SHC7DZM]. https://mysteriesdept.com/r/ANS0CXZ4SHC7DZM
@misc{mysteriesdept_ans0cxz4shc7dzm,
title = {A sudden maser-like or superradiant brightening of a small cold interstellar hydrogen cloud, triggered by a…},
author = {{Mysteries Department}},
year = {2026},
note = {Answer, catalog key ANS0CXZ4SHC7DZM},
url = {https://mysteriesdept.com/r/ANS0CXZ4SHC7DZM}
}