how we can see a star billions of light year away and nothing in between hiding it?
In: Planetary Science
If we’re not talking supernova, then we can only see stuff into the thousands in flight years away.
When it comes to billions, we’re talking about a wide range of extremely sensitive detectors.
1. There’s a colossal amount of approximately nothing between us and them
2. _Stuff_ is transparent to some wavelengths
3. It was much closer when it emitted what we’re seeing
4. What we see from billions of light years away isn’t little red dwarfs, its entire galaxies worth of stars all emitting with just enough photons reaching us to resolve, and only if we look at the same precise spot for a long time
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