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Letter: From the multiverse

Published 10 June 2000

From Tom Clarke

Whilst distant from each other, these two statements in the 20 May New
Scientist are clearly not an “entangled pair”.
On p 38:
” . . . at one of the Lagrangian points—stable points where the
gravitational tug from the Sun and the Earth cancel each other out”., and
on p 51:
” . . . at the point where the gravitational forces of the Sun and Earth
balance out. Unfortunately, this is an unstable orbital position.” Or is this a
“quantum super-imposition” of statements that “can be both vertically and
horizontally polarised at the same time”
(p 27)?

Stephen Battersby writes: The second article is right: this
Lagrangian point is indeed an unstable position. If an object is slightly
off-centre, it will accelerate slowly away, like a ball left near the top of a
hill. Incidentally, the net gravitational effect is not zero, but an attraction
towards the Sun strong enough to keep an object orbiting with a one-year
period.

Newcastle on Tyne

Issue no. 2242 published 10 June 2000

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