Welcome to DU!
The truly grassroots left-of-center political community where regular people, not algorithms, drive the discussions and set the standards.
Join the community:
Create a free account
Support DU (and get rid of ads!):
Become a Star Member
Latest Breaking News
General Discussion
The DU Lounge
All Forums
Issue Forums
Culture Forums
Alliance Forums
Region Forums
Support Forums
Help & Search
Science
Related: About this forumMake Your Own Eclipse Viewer (npr)
August 17, 20176:23 AM ET
Ryan Kellman
Adam Cole
Hundreds of years before solar viewing glasses were readily available, scientists and casual spectators could still enjoy these rare celestial events without frying their eyeballs. They'd use a combination of pinholes and mirrors to redirect the sun's rays onto a screen.
An 18th century engraving depicts a camera obscura.
Bettmann Archive/Getty Images
It took a while to figure out how to build the so-called camera obscura. Ancient Chinese and Greek scholars puzzled over pinholes for centuries before an Arab mathematician and scientist came up with a design.
You can rig up your own version with simple household items. It's easy. Skunk Bear's latest video shows you how.
And remember, never look directly at the sun without appropriate eye protection.
____
Eclipses are beautiful, and they're also really important to scientists. Skunk Bear's latest video explores the many discoveries sparked by solar eclipses. Check it out over on Skunk Bear's YouTube channel.
***
http://www.npr.org/2017/08/17/543633362/make-your-own-eclipse-viewer
InfoView thread info, including edit history
TrashPut this thread in your Trash Can (My DU » Trash Can)
BookmarkAdd this thread to your Bookmarks (My DU » Bookmarks)
3 replies, 4037 views
ShareGet links to this post and/or share on social media
AlertAlert this post for a rule violation
PowersThere are no powers you can use on this post
EditCannot edit other people's posts
ReplyReply to this post
EditCannot edit other people's posts
Rec (9)
ReplyReply to this post
3 replies
= new reply since forum marked as read
Highlight:
NoneDon't highlight anything
5 newestHighlight 5 most recent replies
Make Your Own Eclipse Viewer (npr) (Original Post)
eppur_se_muova
Aug 2017
OP
I hope parents teach this to their kids since school is still out and teachers usually do this.
BigmanPigman
Aug 2017
#2
lamp_shade
(14,850 posts)1. Thanks. I might try the binoculars method... or maybe the ritz cracker.
BigmanPigman
(51,648 posts)2. I hope parents teach this to their kids since school is still out and teachers usually do this.
Canoe52
(2,949 posts)3. KnR!