I was reading an article on NASA website, talking
about the earth speed slowing down; hence days are
is the article
My understanding /conclusion is that eventually
and according to laws of Physics, Earth at some
point will stop spinning for a moment in time, and
then start spinning clockwise instead of
counter-clockwise. Is this possible? Thank you.
|Question Date: 2013-10-24|
The Earth slowing down will cause the days to
get longer, not shorter. The reason why this is
happening is because of the tides transferring the
Earth's rotational momentum to the moon as it
orbits the Earth, causing the moon to orbit
farther out. When the length of the day on the
Earth is the same as the period of the orbit of
the moon, then the Earth will stop slowing down.
Interesting question! The reason the Earth’s
orbit is slowing down is due to the Moon. Through
a phenomena called tidal acceleration, momentum
and energy are transferred between the Earth and
Moon through tidal friction that slows down the
Earth’s orbit speed. This results in an increase
in the (solar) day and also increases the (lunar)
month. However, eventually there will be a
syncing of tidal forces which ultimately means the
Earth and Moon rotate always facing the same spot.
At this point, billions of years in the future,
the solar day will equal the lunar month,
approximately 47 current days. A future observer
would see a 47 day-long “day”, while the moon
remains permanently fixed in the sky.
Click Here to return to the search form.
Copyright © 2020 The Regents of the University of California,
All Rights Reserved.