Links to various tools of astronomy that humankind is using to explore the universe

I've been spending some time updating and reorganizing my page of links to various Tools of astronomy that humankind is using to explore the universe (Update 2025 no longer on my website. It had a good run, but too much work to keep current). Observatories and satellites which serve as our eyes to the universe. Not totally comprehensive, but the highlights that I'm aware of.

I've organized these links by what the facilities are looking at, such as gravity waves or optical telescopes. Also organized by planet, if they are probes to other planets in our solar system. A good thing to do on a rainy Friday.

The below photo is from European Space Agency's Very Large Telescope (the VLT). That telescope is located in Chile. Found (March 2017) on one of their web sites in my list.