Or their signals anyway.
It's a graph; the x axis is time, the y axis is frequency. The dots are background noise, but that big line is a signal. There's a slight but actual chance it really is a signal from extraterrestrial sources, more likely it is a glitchy GPS satellite.
The picture and the explanation are from APOD. I am merely the humble messenger.
2 comments:
Looks like my snowy/frosty window.. with one ultra-long, skinny icicle.
It does look like a snowy night, Hil, with a weird blue sky.
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