noun (pl. gastronauts)
1. A person with a keen appreciation for food.
2. A person whose whole focus is directed to the enjoyment of fine food.

„For confirmation, just think of the millions of people who, after watching Keith, were inspired to cook, eat, drink; to become a gastronautand savour — truly relish — every morsel, every drop, every bloody bit of it!“
James Steen, „Epilogue“, in Stirred But Not Shaken (by Keith Floyd), Pan Books (2010)