Forecast
Humanity demonstrates intergalactic travel by 2126.
Last revised Sep 10, 2026.
initial priorcumulative
Current estimate
probability this has happened by each date
2035
not yet estimated
2050
not yet estimated
2100
not yet estimated
2126 legacy
<0.1%0%–0.1%no evidence yet
A human-built object credibly traverses from the Milky Way to another galaxy.
Resolution criteria
- 2126
- A human-built object credibly traverses from the Milky Way to another galaxy.
Sources
- Interstellar travels aboard radiation-powered rockets
The modeled barrier to crew-scale interstellar flight is extreme energy demand; a 100-ton radiation rocket to the nearest star would require more than fifteen times current annual world energy production under the paper's assumptions.
recorded