4 ms·
The Earth travels at 30 km/s around the Sun. (And the Sun at 230 km/s around the center of the Galaxy.)
by mrb 10y ago
The Earth travels at 30 km/s around the Sun.
(And the Sun at 230 km/s around the center of the Galaxy.)
- coldtea 10y ago>The Earth travels at 30 km/s around the Sun. That's exactly what the parent comment just said.
- anaximander 10y agoI think they're pointing out that while the speed of the earth relative to the sun is 30 km/s, its speed relative to the center of the galaxy is quite a bit faster, which may be a fairer comparison to what's being discussed in the original article.
- thraway2016 10y agoThey're not even remotely comparable. Tangential speed x where r=several thousand light years results in SUBSTANTIALLY less centripetal acceleration than the same tangential speed where r=a few AU.