English: Dr. Luboš Kohoutek, discoverer of the Comet Kohoutek, is seen in the Mission Operations Control Room in the Mission Control Center during a visit to the Johnson Space Center. He is talking over a radio-telephone with the Skylab 4 crewmen in the Skylab space station in Earth orbit. Professor Kohoutek, a well-known Czechoslovakian astronomer who works at the Hamburg Observatory in West Germany, discussed the comet with astronauts Gerald P. Carr, Edward G. Gibson and William R. Pogue. One of the major objectives of the Skylab 4 mission is to monitor the passing of the Comet Kohoutek. Dr. Zdenek Sekanina, who accompanied Dr. Kohoutek on the visit to JSC, is on the telephone in the left background. Dr. Sekanina is with the Smithsonian Observatory in Cambridge, Massachusetts.