Cant view images stored in virrtual directory (2 replies)

I have a folder setup in c:\Wamp64\ called astronomy and can access locally using <img src="/astronomy/gemini.jpg"> however other computers/tablets on the network are not showing the images. I have the alias directory setup like this

Alias /astronomy "C:/wamp64/_astronomy/"
<Directory "C:/wamp64/_astronomy/">
Options +Indexes +FollowSymLinks +MultiViews
Order allow,deny
Allow from all
</Directory>

Is there a problem here? the rest of the page is served up perfectly