Cosmic Exploration · observatory
Yerkes Observatory
Ground-based · 1897 · Williams Bay, Wisconsin
- Type
- Ground-based
- Location
- Williams Bay, Wisconsin
- Altitude (m)
- 334
- Founded
- 1897
Notes
Its 40-inch refractor is the largest ever built for astronomy and always will be: a lens can only be supported at its rim, and beyond this size the glass sags under its own weight.
Open on the Cosmic Exploration shelf — the interactive card, the filters, and everything alongside it.