Make a Wall Mirror Observatory for Backyard Astronomy

You're an erstwhile astronomer, but the most advanced equipment you have is a pair of binoculars?  Tired of craning your neck to make observations?  Well, worry no longer! Here's a nifty trick that is also a fun and easy way to show people the stars and planets.  In this Instructable, I will show you a simple way to make observing the skies easier.

Items you will need:
-a large flat mirror, at least 1 ft square. A couple feet on a side would be perfect.
-binoculars or spyglass
-some kind of support. A 2x4 works great.
-some clean dry rags (optional, but recommended)
-an outdoor table, but a level patch of ground should work too

Step 1: Take your mirror off the wall, and put it outside.

This step is pretty self-explanatory.  Put the mirror on a large stable table or on the ground.  Make sure the shiny side of the mirror faces up!  Clean any dust or gunk off, and remove any condensation that may form.

Comments

[shaggs31]

I like this idea. But it would take me a long time to get used to seeing the stars backwards. Good work!

[tholopotami]

It is a nice idea and it works! I was thinking about this for some time but decided not to do it. From my personal search on this here are two suggestions:
1. Make it smaller and portable. Check out this patent to see how US4278320
2. If you can afford it buy a good quality mirror without a glass cover to avoid aberrations. Check Edmund company for optics (they are expensive).

[sprocketscientist]

Thanks for comment! I thought a large mirror would be useful for allowing a group of people to gather around and look at the same objects. I think it would be great for viewing meteor showers since you can see such a large section of sky. I was trying to view the Leonid meteor shower last night, but I didn't see a single meteor, I think I missed the peak and the moon was really bright.

[BobS]

Overhead projectors and old 8mm film viewers also have first surface mirrors. Surplus shed might have a nice first surface mirror for little...

[tholopotami]

One more thing: 8x21 binoculars are useful but a pair of 10x50 will allow you to see much more (more luminous by a factor of 6.25) like the satellites of jupiter.