But you aren't talking about moving it X distance, you're talking about deflecting it X angle...
Even 1 degree is a decent change at a few AU
The tangent of 1 degree is 0.017 . . . An AU is 93,000,000 miles, so that would require a deflection of 1.5 million miles.
And actually we are talikng about X distance. If we don't slow it down, we still have to push it an earth radius away.
If we're speaking of deflection, even slowing it down without altering its direction might work. The earth's orbital velocity is 30 km/s. If we slow it down by three minutes, that's 5,400 km.
And the set of smaller asteroids will have the same effect on earth as the one large asteroid.
That would be the case if the earth lacked an atmosphere, but 1,000 1-km asteroids are preferable to one 10-km asteroid. Assuming that all those asteroids actually hit the earth.
Taking a 30,000 kg ship at 20 km from the asteroid and the gravitational constant to be 6.7x!0^-11 m^3 kg^-1 s^-2, you would have a gravitational acceleration of about 5x10^-14 m/s^2. To move it 6,400,000 m (one earth radius) would require 1.6x10^10 seconds (about fifty years).
Also, for two asteroids orbiting each other, if these are "small" asteroids, what gravity would obtain between them? Two asteroids of radius 20 kilometers each with 50 kilometers between their centers (and having earth's density for a mass of 5x10^13 kg each) would have a mutual gravitational acceleration of 1.3x10^-5 m/s^2. Would it be that hard to separate them?
And where can you get the real Office for $150? There is the no-commercial-use version for $140. The cheapest commercial-use version is $220. At least, previous versions of Home and Student did not permit commercial use.
Slashdot Mirror
But you aren't talking about moving it X distance, you're talking about deflecting it X angle...
Even 1 degree is a decent change at a few AU
The tangent of 1 degree is 0.017 . . . An AU is 93,000,000 miles, so that would require a deflection of 1.5 million miles.
And actually we are talikng about X distance. If we don't slow it down, we still have to push it an earth radius away.
If we're speaking of deflection, even slowing it down without altering its direction might work. The earth's orbital velocity is 30 km/s. If we slow it down by three minutes, that's 5,400 km.
And the set of smaller asteroids will have the same effect on earth as the one large asteroid.
That would be the case if the earth lacked an atmosphere, but 1,000 1-km asteroids are preferable to one 10-km asteroid. Assuming that all those asteroids actually hit the earth.
Stop dragging facts into Slashdot!
Taking a 30,000 kg ship at 20 km from the asteroid and the gravitational constant to be 6.7x!0^-11 m^3 kg^-1 s^-2, you would have a gravitational acceleration of about 5x10^-14 m/s^2. To move it 6,400,000 m (one earth radius) would require 1.6x10^10 seconds (about fifty years).
Also, for two asteroids orbiting each other, if these are "small" asteroids, what gravity would obtain between them? Two asteroids of radius 20 kilometers each with 50 kilometers between their centers (and having earth's density for a mass of 5x10^13 kg each) would have a mutual gravitational acceleration of 1.3x10^-5 m/s^2. Would it be that hard to separate them?
high-res Retsina iThings
Isn't it Retina?
Is "styley" a word? Also, it should be "its finger", not "it's finger."
And what if the government doesn't care about being seen as civilized?
And more intuitive, as long as you remembered to think in Russian
Barnes and Noble dates back to 1917. How old is this guy?
Why is this story given the Microsoft icon?
I don't know why or if you would care, but I like LaTeX.
Thanks, I'll try it.
Maybe not Office 2013, but I got a disc with Office 2010.
But gnumeric gives LaTeX output. Can you do that in Microsoft Excel?
There was an Office 2012?
Isn't the official release already out?
http://office.microsoft.com/en-us/buy/
Is my jaundiced attitude towards Minecraft as a service putting down the people who run it?
It seems so unnecessarily negative!
Perhaps, but are you as likely to learn from it as running other services?
And where can you get the real Office for $150? There is the no-commercial-use version for $140. The cheapest commercial-use version is $220. At least, previous versions of Home and Student did not permit commercial use.
OO and LO has issues opening simple ad and subtrac sheets.
I want my software to have issues opening ad sheets,
Yeah, LibreOffice Calc has an array check box for operations that return arrays. Nothing like Excel's intuitive F2 Cntl-shift-enter.
OpenOffice and LibreOffice are certainly better than Microsoft Office on Linux. I can't even get Microsoft Office to work using Wine and VirtualBox.
Maybe I should be telling you to get off my lawn, but I think of servers more in terms of ftpd or httpd.
Well I do more than point at it.
Would the pH of that be 0 (one mole of H^+ or H_3O^+ per liter?) ?