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seen Apr 30 at 0:22

Jul
2
awarded  Curious
Dec
17
awarded  Popular Question
Oct
12
awarded  Self-Learner
Oct
12
comment Earth moves how much under my feet when I jump?
I want to look at this more later, but don't the units of g/(3*omega^2) involve radians squared (among other things)? I don't see where you get rid of those?
Oct
12
comment Earth moves how much under my feet when I jump?
I'm going to plug this into Mathematica, but I think radial gravity means the result will be an ellipse, which has no clean polar formula.
Oct
12
comment Earth moves how much under my feet when I jump?
OK, so you're taking into account that the direction of gravity depends on position, but assuming that the magnitude of gravity remains constant? I believe this will give you a fairly accurate approximation.
Oct
12
revised Earth moves how much under my feet when I jump?
surprising result?
Oct
12
revised Earth moves how much under my feet when I jump?
numerical methods, complete rewrite
Jul
16
revised Local real-time lightning tracker site?
another source
Jul
16
answered Local real-time lightning tracker site?
Jul
16
comment Local real-time lightning tracker site?
@Kyle (and anna-v), unless I'm missing something, aren't those maps scaled to about 6 miles per pixel? I'm looking for a city-level solution, where I can pinpoint lightning strikes in near-real-time down to the several-hundred-feet level. Am I missing something in those maps? They don't appear to be zoomable.
Jul
15
comment Local real-time lightning tracker site?
Can you zoom to a local level on this map? (doesn't seem possible). And it hasn't been updated in 15 minutes? I'm talking about something minute-to-minute here.
Jul
15
asked Local real-time lightning tracker site?
Jun
6
revised Is there a simple yet accurate formula for where on Earth the Sun and Moon are directly overhead?
more detail re what I've tried
Jan
6
revised Earth moves how much under my feet when I jump?
more comments on formula
Jan
6
revised Earth moves how much under my feet when I jump?
corrected equation, but the answer for s=1 remains the same
Jan
6
awarded  Teacher
Jan
6
answered Earth moves how much under my feet when I jump?
Jan
4
comment Determine date of birth from “astrological” signs?
Actually, you could use HORIZONS to download daily planetary data (provided you had constellation boundary data), and figure this out "the hard way", but I was wondering if anyone had an easier "proof".
Jan
4
comment Determine date of birth from “astrological” signs?
I agree, although things like retrograde motion may throw this off, and I'm not convinced that 1 planet's complete orbit = another planet's single constellation change (or similar), so it's possible this still won't work.