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[AZ-Observing] Re: Mars
- From: Jeff Hopkins <phxjeff@xxxxxxxxxxx>
- To: az-observing@xxxxxxxxxxxxx
- Date: Thu, 3 Jul 2003 15:37:43 -0700
Space Weather News for July 3, 2003
http://spaceweather.com
EARTH AT APHELION: Earth's orbit is not a perfect circle, it's an ellipse.
This means our planet is not always the same distance from the sun. The
greatest distance, which astronomers call aphelion, occurs this year on
the Fourth of July. Curiously, the globally-averaged temperature of Earth
is greatest when we are farthest from the sun. Follow the links on
spaceweather.com and find out why.
MARS DUST: The distance between Earth and Mars is shrinking fast. Although
the two worlds won't be closest together until late August, amateur
astronomers are already getting remarkable views of Mars through backyard
telescopes. For instance, some advanced observers have just spotted a dust
cloud forming near Hellas Basin--a giant impact crater on Mars' southern
hemisphere. Two years ago a similar cloud grew into a global dust storm
on Mars. Will this one do the same? Probably not, although astronomers
will be watching carefully to see what happens.
--
Jeff Hopkins
HPO SOFT
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