New Horizons Jupiter Encounter |
New Horizons Jupiter Encounter |
Guest_AlexBlackwell_* |
Jan 10 2007, 09:47 PM
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Guest_Analyst_* |
Jan 22 2007, 11:58 AM
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Jan 22 2007, 12:24 PM
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Senior Member Group: Members Posts: 3652 Joined: 1-October 05 From: Croatia Member No.: 523 |
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Jan 22 2007, 12:57 PM
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Senior Member Group: Members Posts: 2488 Joined: 17-April 05 From: Glasgow, Scotland, UK Member No.: 239 |
Galactic center? Great Attractor? Seriously, though, velocity at departure from Earth might be one way of doing it - or even days in flight/distance from Earth (aha! which side of the orbit... ...oh, bother!). Bob Shaw -------------------- Remember: Time Flies like the wind - but Fruit Flies like bananas!
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Jan 22 2007, 01:06 PM
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Senior Member Group: Members Posts: 3652 Joined: 1-October 05 From: Croatia Member No.: 523 |
Bob, in that case it would be more fitting to talk about energy, not velocity, specifically Characteristic energy. A smaller payload can get propelled faster so energies are a better way to directly compare things. Talking about speed is just a way to invoke that "oooh" factor in laymen, nothing else.
It's All Relative , anyway... -------------------- |
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Jan 22 2007, 01:22 PM
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#6
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Senior Member Group: Members Posts: 2488 Joined: 17-April 05 From: Glasgow, Scotland, UK Member No.: 239 |
Bob, in that case it would be more fitting to talk about energy, not velocity, specifically Characteristic energy. A smaller payload can get propelled faster so energies are a better way to directly compare things. Talking about speed is just a way to invoke that "oooh" factor in laymen, nothing else. It's All Relative , anyway... Yes, I'd been idly musing in that direction... ...really, we'd need a new unit of energy, too - something comparable to area (the Wales) or mass (the US Naval Destroyer). Bob Shaw -------------------- Remember: Time Flies like the wind - but Fruit Flies like bananas!
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Jan 24 2007, 09:27 AM
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Member Group: Members Posts: 593 Joined: 20-April 05 Member No.: 279 |
...really, we'd need a new unit of energy, too - something comparable to area (the Wales) or mass (the US Naval Destroyer). I quite agree. But it needs to be scaled to best suit the application. And so I humbly propose the: Hot Bath It's intuitive, commonplace, and gives you a real sense of potent energy. Here's a few comparisons to whet your appetite (and don't forget to do behind your ears) 200 hours of TV = 1 HB 1kg from launch to LEO = 3.3 HB 1kg from launch to GEO = 9.7 HB Kinetic Energy (relative to the Sun) of New Horizons = 6.3 kHB 1 Transatlantic jet flight = 18 kHB Apollo 17 = 400 kHB etc... Andy |
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