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Mars addendum
For anyone who might be new to Mars I should clarify a few observations when talking about Mars. Experienced folks may ignore this if you have looked at Mars for some time. When I say I saw places like Hellas, Syrtis Major, or other places on Mars you can't expect to see things with the detail you can on the moon. On the moon you can see the actual structural features, much like a pen and ink drawing. Mars is quite different. What you see there are pastel shades of say an Impressionist painting (smeared by seeing). No hard lines and certainly no craters and such. It is just too small and far away. Astro photos can fool you when you observe visually. They show detail unobtainable to the human eye using amateur telescopes of moderate size. Mars maps by say NASA are not much help either. The trick is to find a map or image that shows the general location on the planet of some reflection (albedo) feature and what the colors look like at the eyepiece. Good examples are the poles that stand out easily because they are so reflective. But the Hellas Basin is also light colored, big, and located at what could easily be mistaken as a pole. So to observe Mars some homework is sort of required. In large part the game is to figure out "what am I seeing"? Seeing is really important here as it easily smears out subtle shadings. Filters are also required to make out the subtle shadings. Know what to expect prior to going to the eyepiece. Dress warm :) But that's what makes Mars observing fun. Don't get discouraged if you look and go "what is he talking about"? Mars is worth the effort when you do get the magic moment and you know what you are looking for. There was a long line of very talented observers, with very big telescopes, who spent their lives chasing this planet and still didn't get it right but they had a heck of a trip. |
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Thought I should follow up to clarify.
On Saturday, December 21, 2024 at 08:17:14 AM EST, Ian Stewart <ian@...> wrote:
Thanks Mark - good suggestions. On 12/21/2024 8:00 AM, jimcoble2000 via
groups.io wrote:
For anyone who might be new
to Mars I should clarify a few observations when talking about
Mars. Experienced folks may ignore this if you have looked at
Mars for some time.
When I say I saw places like
Hellas, Syrtis Major, or other places on Mars you can't expect
to see things with the detail you can on the moon. On the moon
you can see the actual structural features, much like a pen
and ink drawing. Mars is quite different. What you see there
are pastel shades of say an Impressionist painting (smeared by
seeing). No hard lines and certainly no craters and such. It
is just too small and far away. Astro photos can fool you when
you observe visually. They show detail unobtainable to the
human eye using amateur telescopes of moderate size. Mars maps
by say NASA are not much help either.
The trick is to find a map or
image that shows the general location on the planet of some
reflection (albedo) feature and what the colors look like at
the eyepiece. Good examples are the poles that stand out
easily because they are so reflective. But the Hellas Basin is
also light colored, big, and located at what could easily be
mistaken as a pole. So to observe Mars some homework is sort
of required. In large part the game is to figure out "what am
I seeing"?
Seeing is really important
here as it easily smears out subtle shadings. Filters are also
required to make out the subtle shadings. Know what to expect
prior to going to the eyepiece. Dress warm :)
But that's what makes Mars
observing fun. Don't get discouraged if you look and go "what
is he talking about"? Mars is worth the effort when you do get
the magic moment and you know what you are looking for. There
was a long line of very talented observers, with very big
telescopes, who spent their lives chasing this planet and
still didn't get it right but they had a heck of a trip.
|
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