Back to Home

General Forum Message

Forums: Atm · Astrophotography · Blackholes · Blackholes2 · CCD · Celestron · Domes · Education
Eyepieces · Meade · Misc. · God and Science · SETI · Software · UFO · XEphem
RSS Button

Home | Discussion Forums | Misc. Topics | Post
Login

Be the first pioneers to continue the Astronomy Discussions at our new Astronomy meeting place...
The Space and Astronomy Agora
Seeing Stars From A Cave?

Forum List | Follow Ups | Post Message | Back to Thread Topics
Posted by JC Irvine on February 17, 2002 22:53:59 UTC

My brother and I are having a debate about night vision and our abilities to discern distant stars.

According to his theory, the only thing keeping us from seeing the stars during the day is the fact that our pupils aren't dilated enough to see them. He agrees that if our pupils WERE dilated during day time, we'd fry our eyes due to sunlight. He believes that if you were in a cave some miles down, however, that your pupils would dilate and that you'd be able to see the stars by looking up through a hole to the surface.

In his words then, if your eyes are night adapted (pupils dilated) you'd be able to see the stars even in daylight.

From my thinking, the presence of sunlight would act as a filter and obscure the stars rendering them invisible both on the surface AND in the cave.

There is a wager at stake... a shiny penny... to the winner. Any facts/info folks have that could put this issue to rest would be appreciated.

Follow Ups:

Login to Post
Additional Information
Google
 
Web www.astronomy.net
DayNightLine
About Astronomy Net | Advertise on Astronomy Net | Contact & Comments | Privacy Policy
Unless otherwise specified, web site content Copyright 1994-2021 John Huggins All Rights Reserved
Forum posts are Copyright their authors as specified in the heading above the post.
"dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET"
are trademarks of John Huggins