|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
Could impacts affect earth's orbit
How large would an impact on earth have to be in order to have a
material change to earth's orbit? That at least our best time pieces and/or our calander has to be adjusted? Would there be enough cilivalization left to care? |
#2
|
|||
|
|||
Could impacts affect earth's orbit
"Luke J. Nester" wrote in message
om... How large would an impact on earth have to be in order to have a material change to earth's orbit? That at least our best time pieces and/or our calander has to be adjusted? Would there be enough cilivalization left to care? I suspect that not only would there be no cicilization, but no life, and probasbly not even continents. Such an impact would likely melt the crust. Could be wrong, but the kinetic energy/mass required would have to be substantial. Sany |
#3
|
|||
|
|||
Could impacts affect earth's orbit
|
#4
|
|||
|
|||
Could impacts affect earth's orbit
"LJN" == Luke J Nester writes:
LJN How large would an impact on earth have to be in order to have a LJN material change to earth's orbit? That at least our best time LJN pieces and/or our calander has to be adjusted? Would there be LJN enough cilivalization left to care? Consider that the mass of the Earth is about 6E24 kg and its velocity around the Sun is about 30 km/s. Under even the most extreme scenario, the velocity of an impactor is not going to be more than about 100 km/s (e.g., a long-period comet on a retrograde orbit). Now the question becomes, How significant a change would you consider significant? I think it is clear, though, that even a modest change (e.g., 0.1%) in the Earth's orbit would require a fairly massive impact, far larger than the impact that killed off the dinosaurs. -- Lt. Lazio, HTML police | e-mail: No means no, stop rape. | http://patriot.net/%7Ejlazio/ sci.astro FAQ at http://sciastro.astronomy.net/sci.astro.html |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Hans Moravec's Original Rotovator Paper | James Bowery | Policy | 0 | July 6th 04 07:45 AM |
PDF (Planetary Distance Formula) explains DW 2004 / Quaoar and Kuiper Belt | hermesnines | Astronomy Misc | 10 | February 27th 04 02:14 AM |
Incontrovertible Evidence | Cash | Astronomy Misc | 1 | August 24th 03 07:22 PM |
Incontrovertible Evidence | Cash | Amateur Astronomy | 6 | August 24th 03 07:22 PM |