Factual error: While the Leonov has a centrifugal section to simulate gravity, the ship's bridge is not part of it (evidenced by the stationary views outside its portholes). Yet in various scenes, including the one when Floyd rushes in to discuss his plan to return to Earth sooner with Tanya, gravity seems quite evident. Floyd marches across the compartment onto the raised pilot area's floor, then steps down from it, his foot landing audibly. Tanya's open jacket also hangs down normally as she moves about. Yet when Floyd demonstrates his plan using two pens, they float in mid air. (01:26:50)
2010 (1984)
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Directed by: Peter Hyams
Starring: Helen Mirren, John Lithgow, Roy Scheider, Bob Balaban
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2010 is the direct sequel to the Science Fiction drama 2001: A Space Odyssey where a mysterious alien Monolith has lead humanity to Jupiter's moon Io to discover the origins of life. A joint Soviet/American team goes out to investigate this as well as the "malfunction" of HAL, which caused the deaths of the prior crew, minus David Bowman. Less cerebral than its predecessor, 2010 adds a cold war edge to the discovery of the derelict ship, its contents and the fate of Mankind.
More mistakes in 2010
Heywood Floyd: My response is, we don't have enough fuel for an earlier departure.
HAL 9000: The answer is, "I am aware of these facts. Nevertheless you must leave within two days."
Heywood Floyd: HAL, who the hell is sending this?
HAL 9000: I'm sorry, Dr. Floyd, I don't know.
Heywood Floyd: Well, tell whoever it is that I can't take any of this seriously unless I know who I'm talking to.
HAL 9000: Dr. Floyd?
Heywood Floyd: Yes?
HAL 9000: The response is, "I was David Bowman."
Trivia: An interesting scene to watch is when Heywood Floyd is talking to his associate on the bench in front of the White House, there is a long shot when you can see a person feeding pigeons. It is none other than Arthur C. Clarke in a cameo appearance. (00:10:59)
Question: One thing that always confused me is why was it necessary to jettison Discovery after it was used as a booster rocket? Why couldn't they just keep it attached to the Leonov as they made their escape?
Answer: They needed to lighten their load, to make it go faster. In Back to the Future Part III, after hijacking the train, the Doc and Marty unhooked the passenger cars to lighten the load.
Answer: If they didn't, any further manoeuvring would require much more fuel. They would be moving the mass of two ships.