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SciFi movies and pathetic misconceptions of tech failing for the story line.

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Sal Ammoniac:

--- Quote from: David Hess on April 18, 2023, 04:15:32 pm ---I did not think Star Wars was that bad, for space opera.  I had no interest in seeing it but my parents forced me to go.
--- End quote ---

How old were you? I was 17 when it came out and my friends and I waited in line for four hours to see it on opening day.

rdl:

--- Quote from: BrianHG on April 18, 2023, 02:24:37 pm ---My meaning 'straight up' as in keeping a relative stationary position above the ground.  This means if the ground is rotating, you do have some orbital speed, it's just at low orbits like 408km up, it is not enough to stop you from falling back down like a rock.

--- End quote ---

It's not enough at any orbit.

David Hess:

--- Quote from: Sal Ammoniac on April 18, 2023, 04:27:53 pm ---
--- Quote from: David Hess on April 18, 2023, 04:15:32 pm ---I did not think Star Wars was that bad, for space opera.  I had no interest in seeing it but my parents forced me to go.
--- End quote ---

How old were you? I was 17 when it came out and my friends and I waited in line for four hours to see it on opening day.
--- End quote ---

I was 7.  I saw it on the large screen at the Orange Cinedome and just got in on the tail end of a line.  The theater was completely packed.

Kim Christensen:

--- Quote from: rdl on April 18, 2023, 04:30:15 pm ---
--- Quote from: BrianHG on April 18, 2023, 02:24:37 pm ---My meaning 'straight up' as in keeping a relative stationary position above the ground.  This means if the ground is rotating, you do have some orbital speed, it's just at low orbits like 408km up, it is not enough to stop you from falling back down like a rock.

--- End quote ---
It's not enough at any orbit.

--- End quote ---

If you had a 35,786 km tall space-elevator at Earth's equator, and rode it all the way to the top and stepped off, you'd stay where you were relative to the elevator and the ground. (More or less)
This is because the elevator is rotating at 1 RPD (1 revolution per day) with the Earth. ie: The top of the elevator would have an angular velocity of apx 3.07km/sec due to it being affixed to the ground.

Since the the angular velocity of the Earth's rotation at the equator is 465.1m/s, if you launched a rocket straight up (And managed to maintain that angular velocity) you could reach an altitude where 465.1m/s of orbital speed was sufficient to prevent you from reentering Earth's atmosphere. Around 1.84 million Km altitude.. Not sure if this would be a stable Earth orbit due to influences from the Sun and Moon. It would probably end up in solar orbit soon enough.

rdl:
That would work. Though I think the elevator would have to be a bit taller to allow for the counterweight.

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