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The angular diameter of stars that are light-years away are really really small. Yet they are visible to the naked eye and cameras all the time. So it's not jus
by vlasev 9y ago
The angular diameter of stars that are light-years away are really really small. Yet they are visible to the naked eye and cameras all the time. So it's not just about the angular diameter.
- jacquesm 9y agoBut they shine a lot of light in every direction, including directly at you, the observer. So even if they are small they compensate for that by their power output and the fact that their radiation is a near perfect sphere. A satellite trying hard to hide isn't going to be nearly as friendly as that for an observer.
- planteen 9y agoHow are you going to power said satellite? Those massive solar arrays are going to reflect emag across the spectrum (radar returns and solar returns).