.3° at 25B km is still a pretty large distance. Some random calculator online says that would be 1.3090e+8 kilometers or 130,900,000km. The earth-moon distance is roughly 240,000km. 1AU ~= 149,597,900 So .3° is just under 1AU, and essentially to cosmological scales .3° = 1AU. And it's only getting bigger as it continues to get further away. So essentially, just point at the sun and it'll hit earth
Of course, the sun will amplify the radio waves!
What the huh? That's not even funny if I tilt my head sideways and squint at it.
You didn't watch the three body problem, I gather :)
I'm glad someone got it :)
The apparent size of the moon is 0.5 degrees. So 0.3 degrees is not _that_ narrow. You can point your finger at the moon.