![No signal. Antenna ban icon. WIFI signal is prohibited. Stop or ban red round sign with radio signal icon. Vector illustration Stock Vector Image & Art - Alamy No signal. Antenna ban icon. WIFI signal is prohibited. Stop or ban red round sign with radio signal icon. Vector illustration Stock Vector Image & Art - Alamy](https://c8.alamy.com/comp/2E36RT0/no-signal-antenna-ban-icon-wifi-signal-is-prohibited-stop-or-ban-red-round-sign-with-radio-signal-icon-vector-illustration-2E36RT0.jpg)
No signal. Antenna ban icon. WIFI signal is prohibited. Stop or ban red round sign with radio signal icon. Vector illustration Stock Vector Image & Art - Alamy
![A mysterious interstellar radio signal has been blinking on and off every 22 minutes for over 30 years A mysterious interstellar radio signal has been blinking on and off every 22 minutes for over 30 years](https://images.theconversation.com/files/535259/original/file-20230703-257103-z65saa.png?ixlib=rb-1.1.0&rect=0%2C0%2C2880%2C1621&q=20&auto=format&w=320&fit=clip&dpr=2&usm=12&cs=strip)
A mysterious interstellar radio signal has been blinking on and off every 22 minutes for over 30 years
![Astronomers spot record-breaking radio signal that took 8 billion years to reach Earth: "Mind-blowing" - CBS News Astronomers spot record-breaking radio signal that took 8 billion years to reach Earth: "Mind-blowing" - CBS News](https://assets2.cbsnewsstatic.com/hub/i/r/2020/06/09/b76e853e-53dd-4d54-b864-b7f0a3a4cadd/thumbnail/640x370/df6d72635bf38d4b90bcb546e55bd598/1920-v2-final-r1periodicity-name.jpg?v=4d0a8a0e724da64f433bf70cf12725a2)
Astronomers spot record-breaking radio signal that took 8 billion years to reach Earth: "Mind-blowing" - CBS News
![Yes, mysterious radio signal from space detected in 1977 – but probably caused by comet - Africa Check Yes, mysterious radio signal from space detected in 1977 – but probably caused by comet - Africa Check](http://africacheck.org/sites/default/files/2019/12/COMETDONE.png)