![Clyde William Tombaugh - First Day Cover Signed co-signed by: Fred Lawrence Whipple, Lubos Kohoutek | HistoryForSale Item 79562 Clyde William Tombaugh - First Day Cover Signed co-signed by: Fred Lawrence Whipple, Lubos Kohoutek | HistoryForSale Item 79562](https://www.historyforsale.com/productimages/jpeg/79562.jpg)
Clyde William Tombaugh - First Day Cover Signed co-signed by: Fred Lawrence Whipple, Lubos Kohoutek | HistoryForSale Item 79562
![Space Astronomer Lubos Kohoutek from Hamburg Observatory Comet NASA Photo 1973 by NASA: Photograph | Bits of Our Past Ltd Space Astronomer Lubos Kohoutek from Hamburg Observatory Comet NASA Photo 1973 by NASA: Photograph | Bits of Our Past Ltd](https://pictures.abebooks.com/inventory/22870060925.jpg)
Space Astronomer Lubos Kohoutek from Hamburg Observatory Comet NASA Photo 1973 by NASA: Photograph | Bits of Our Past Ltd
![Lubos Kohoutek - Commemorative Sheet With First Day Cancellation Circa 1967 co-signed by: James A. Van Allen, Clyde William Tombaugh | HistoryForSale Item 217519 Lubos Kohoutek - Commemorative Sheet With First Day Cancellation Circa 1967 co-signed by: James A. Van Allen, Clyde William Tombaugh | HistoryForSale Item 217519](https://www.historyforsale.com/productimages/thumbnails/47262.jpg)
Lubos Kohoutek - Commemorative Sheet With First Day Cancellation Circa 1967 co-signed by: James A. Van Allen, Clyde William Tombaugh | HistoryForSale Item 217519
![Lubos Kohoutek - Commemorative Sheet With First Day Cancellation Circa 1967 co-signed by: James A. Van Allen, Clyde William Tombaugh | HistoryForSale Item 217519 Lubos Kohoutek - Commemorative Sheet With First Day Cancellation Circa 1967 co-signed by: James A. Van Allen, Clyde William Tombaugh | HistoryForSale Item 217519](https://www.historyforsale.com/productimages/thumbnails/217519.jpg)