QuestionRegarding the 'brightness' of our sun relative to other visable stars

YOOR-un-us

I can see you. Can you see me?
If an identical inhabited earth planet orbited every visable star, what % of them would be able to see our sun? (Approximately)
Thanks.

COLGeek

Moderator
General speculation or something for class?

billslugg

Human eye can see down to magnitude 6.5. (Curtis 1903)
There are 9,100 stars visible from Earth at magnitude 6.5 or brighter. (SIMBAD Astronomical database)

If you assume all stars are same intrinsic brightness as the Sun, which they aren't, then there are 9,100 star systems that could see us.

COLGeek

Classical Motion

100%. If you can see their star, then they should be able to see our star. There might be a large difference in brightness, just like we see here, but still, they should be able to see us. You did say identical earth.

YOOR-un-us

General speculation or something for class?
General speculation, thanks.

YOOR-un-us

Human eye can see down to magnitude 6.5. (Curtis 1903)
There are 9,100 stars visible from Earth at magnitude 6.5 or brighter. (SIMBAD Astronomical database)

If you assume all stars are same intrinsic brightness as the Sun, which they aren't, then there are 9,100 star systems that could see us.
Very interesting. Thank you for this.

billslugg

YOOR-un-us

100%. If you can see their star, then they should be able to see our star. There might be a large difference in brightness, just like we see here, but still, they should be able to see us. You did say identical earth.
Haha yes, I see. I need to put more thought into my question. I'll be back, thank you.

gbws

Human eye can see down to magnitude 6.5. (Curtis 1903)
There are 9,100 stars visible from Earth at magnitude 6.5 or brighter. (SIMBAD Astronomical database)

If you assume all stars are same intrinsic brightness as the Sun, which they aren't, then there are 9,100 star systems that could see us.
you are rihgt.

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