Who Needs a Moon?

Who Needs a Moon?
http://news.sciencemag.org/scienceno...ds-a-moon.html

"In 1993, French mathematicians Jacques Laskar and Philippe Robutel
showed that Earth’s large moon has a stabilizing effect on our planet’s
climate. Without the moon, gravitational perturbations from other
planets, notably nearby Venus and massive Jupiter, would greatly disturb
Earth’s axial tilt, with vast consequences for the planet’s climate. The
steadily orbiting moon’s gravitational tug counteracts these
disturbances, and Earth’s axial tilt never veers too far from the
current value of 23.5°, where 0° would mean the axis was perpendicular
to the plane of Earth’s orbit around the sun.

"Indeed, Laskar and Robutel also showed that the axial tilt of Mars,
which has only two tiny moons, has varied between 10° and 60° in the
past, which caused huge climate variations that in turn could have
contributed to the loss of most of the planet’s atmosphere, leaving Mars
the bone-dry desert world that it is now. Since then, most
astrobiologists have assumed that Earth-like planets in other solar
systems would need a comparatively large moon to support complex life
over long periods of time".

See: http://news.sciencemag.org/scienceno...ds-a-moon.html

"Sam Wormley" wrote in message
...
Who Needs a Moon?
http://news.sciencemag.org/scienceno...ds-a-moon.html

"In 1993, French mathematicians Jacques Laskar and Philippe Robutel showed
that Earth’s large moon has a stabilizing effect on our planet’s climate.
Without the moon, gravitational perturbations from other planets, notably
nearby Venus and massive Jupiter, would greatly disturb Earth’s axial
tilt, with vast consequences for the planet’s climate. The steadily
orbiting moon’s gravitational tug counteracts these disturbances, and
Earth’s axial tilt never veers too far from the current value of 23.5°,
where 0° would mean the axis was perpendicular to the plane of Earth’s
orbit around the sun.

"Indeed, Laskar and Robutel also showed that the axial tilt of Mars, which
has only two tiny moons, has varied between 10° and 60° in the past, which
caused huge climate variations that in turn could have


".....could have......"



contributed to the loss of most of the planet’s atmosphere, leaving Mars
the bone-dry desert world that it is now. Since then, most astrobiologists
have assumed that Earth-like planets in other solar systems would need a
comparatively large moon to support complex life over long periods of
time".

See: http://news.sciencemag.org/scienceno...ds-a-moon.html

On May 30, 11:01*am, "huhie" wrote:
"Sam Wormley" wrote in message

...









Who Needs a Moon?
*http://news.sciencemag.org/scienceno...ds-a-moon.html

"In 1993, French mathematicians Jacques Laskar and Philippe Robutel showed
that Earth’s large moon has a stabilizing effect on our planet’s climate.
Without the moon, gravitational perturbations from other planets, notably
nearby Venus and massive Jupiter, would greatly disturb Earth’s axial
tilt, with vast consequences for the planet’s climate. The steadily
orbiting moon’s gravitational tug counteracts these disturbances, and
Earth’s axial tilt never veers too far from the current value of 23.5°,
where 0° would mean the axis was perpendicular to the plane of Earth’s
orbit around the sun.

"Indeed, Laskar and Robutel also showed that the axial tilt of Mars, which
has only two tiny moons, has varied between 10° and 60° in the past, which
caused huge climate variations that in turn could have

".....could have......"


contributed to the loss of most of the planet’s atmosphere, leaving Mars
the bone-dry desert world that it is now. Since then, most astrobiologists
have assumed that Earth-like planets in other solar systems would need a
comparatively large moon to support complex life over long periods of
time".

See:http://news.sciencemag.org/scienceno...ds-a-moon.html

To Sam Wormley, ".....could have......" = objective proof positive,
and no other interpretation possible.

We have the same kind of problem with others, including William Mook.

http://translate.google.com/#
Brad Guth, Brad_Guth, Brad.Guth, BradGuth, BG / “Guth Usenet”