Narrowband radio signalUnresolved
The Wow! Signal
A strong, narrowband radio signal detected once in 1977 that matched the expected rise and fall of a distant source crossing the Big Ear telescope beam.
READ THE CASE FILE ↗SOURCE-FIRST / OPEN QUESTIONS
Space mysteries
with receipts.
Short case files for unusual observations, unresolved signals, and surprising measurements. Each record separates what was observed from the explanations scientists are testing and what remains unknown.
Irregular stellar dimmingDust favoured
Tabby's Star
KIC 8462852 produced deep, irregular dips in brightness that do not resemble a simple planet transit.
READ THE CASE FILE ↗Interstellar objectMechanism debated
ʻOumuamua
The first confirmed interstellar object seen passing through our Solar System showed an unusual shape, light curve, and small non-gravitational acceleration.
READ THE CASE FILE ↗Millisecond radio transientsSources identified, population diverse
Fast Radio Bursts
Brief, extraordinarily bright radio flashes from distant galaxies that can repeat, fade, or arrive only once.
READ THE CASE FILE ↗HOW TO READ THESE FILES
Curious, not certain.
“Unresolved” describes the evidence, not a probability of extraordinary claims. Follow the primary sources, check the observation dates, and keep competing explanations visible.