Satellites have max 20 watts transmit!

That’s because of the very high gain receivers at the other end. You have to account for free space loss. There’s no free ride. I used to do radar data analysis for NASA. I also did satellite link budget analysis for the military. The same sort of idea applies to Hubble Space Telescope being able to detect and photograph galaxies at the edge of the universe, I.e., from pretty soon after the Big Bang.

Some interesting points(a verbatim quote), regarding, "the edge of the universe"(including theory/opinion/speculation, of course), from the source linked:

"Because space is expanding, it’s possible for the galaxies to appear as if they are moving faster than light, without violating relativity — which says that nothing can go faster than light in a vacuum. The actual size of the observable universe is 46 billion light-years in any direction, even though the universe began only 13.8 billion years ago, Mack said. But that still sets a limit on the size of the universe humans can see, called the observable universe. Anything outside of that radius of 46 billion light-years is not visible to Earthlings, and it never will be. That’s because the distances between objects in the universe keep getting bigger at a rate that’s faster than the light beams can get to Earth.

And on top of that, the rate of expansion has not been uniform. For a brief fraction of a second after the Big Bang, there was a period of accelerated expansion called inflation, during which the universe grew at a much faster pace than it is growing now. Whole regions of space will never be observable from Earth for that reason. Mack noted that assuming inflation happened, the universe is actually 1023 times bigger than the 46 billion light-years humans can see. So if there is an edge to the universe, it’s so far away Earthlings can’t see it, and never will." [Big Bang, Deflated? Universe May Have Had No Beginning]

quoted from: (https://www.livescience.com/33646-universe-edge.html)

I dunno who that dude is but he’s way out of whack with what we actually know about the universe. Hey, Mack rhymes with Whack. Coincidence?

To whit,

In physical cosmology, the age of the universe is the time elapsed since the Big Bang. The current measurement of the age of the universe is 13.799±0.021 billion (109) years within the Lambda-CDM concordance model.[1][2]

and,

In physical cosmology, cosmic inflation, cosmological inflation, or just inflation, is a theory of exponential expansion of space in the early universe. The inflationary epoch lasted from 10−36 seconds after the conjectured Big Bang singularity to sometime between 10−33 and 10−32 seconds after the singularity. Following the inflationary period, the universe continues to expand, but at a less rapid rate.[1]

(The expression 10-36 is equal to 10 to the minus 36 power.)

There are just too many universes to keep up with(well, theories, anyway). I’m still deciding whether to color, name and arrange my quarks, then fire a few hadrons into each other and weigh the bosons, or just pluck my cosmic strings, vibrate up a nice, informational hologram and entangle myself the hell out of here. Trying to contemplate, at what speeds the very first matter/energy, whatever form it may have taken, and how that would have affected, "time", since there is no time, at the speed of light(Relativity, of course, IF that was relevant, in the beginning, however THAT looked), will just have to take the back seat......oh, wait....I threw my brain back there, somewhere. You think Macky might be whacky? Could be, by cracky!