[meteorite-list] MARS

[Jerry]

Thanks John for this explanation. I finally make some sense for this 
reoccuring piece.
Jerry Flaherty
----- Original Message ----- 
From: "Kerns, John" <John.Kerns at ngc.com>
To: <meteorite-list at meteoritecentral.com>
Sent: Thursday, August 02, 2007 6:46 PM
Subject: Re: [meteorite-list] MARS



> It was a gross misrepresentation; but mathematically the statement was

> correct.

> People keep ignoring/omitting the "at 75-power" part of the text.

>

> At 25 arcseconds (the angular size of Mars in August 2003), if you

> magnify the image by a factor of 75 you achieve an effective angular

> size of 0.52 degrees - which is roughly the size of the full Moon when

> observed at 1x.  The statement infers that a modest power telescope must

> be used.  Of course, the 75x image of Mars will not look the same as

> viewing the Moon with your eye.  It now becomes a matter of perspective.

> A simple example of this is that the full Moon appears much larger when

> it is on the horizon (just rising) than when it is overhead 6 hours

> later.  The actual size of the moon does not change.  This has been

> debated for years, but if you hold a dime at arms length and compare it

> to the size of the Moon at both times you will observe that the Moon

> maintains the same relative size.  Your mind interprets the size as

> "larger" because of the existence of foreground objects.  This is the

> famous "Moon Effect".

>

> John Kerns

>

> -----Original Message-----

> From: meteorite-list-bounces at meteoritecentral.com

> [mailto:meteorite-list-bounces at meteoritecentral.com] On Behalf Of Chris

> Peterson

> Sent: Wednesday, August 01, 2007 8:48 PM

> To: meteorite-list at meteoritecentral.com

> Subject: Re: [meteorite-list] MARS

>

> This silly bit of out-of-date news is fated to return, year after year.

> The Internet refuses to let the story die. Mars was quite close in 2003.

>

> This year it will be at opposition in December, and will not be very

> impressive at less than 16 arcseconds diameter.

>

> BTW, when the naked-eye Mars looks as large as the Moon, we're in deep

> trouble!

>

> Chris

>

> *****************************************

> Chris L Peterson

> Cloudbait Observatory

> http://www.cloudbait.com

>

>

> ----- Original Message -----

> From: "WILLIAM GARRETT" <wgarrett202 at gmail.com>

> To: <meteorite-list at meteoritecentral.com>

> Sent: Wednesday, August 01, 2007 11:53 AM

> Subject: [meteorite-list] MARS

>

>

>> *Subject: **Fw: Mars - Once In A Lifetime*

>>

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>>                                    *Mars* <b at stanleypark.org%3EMars>*

>> **

>> ****  *

>>

>> *

>> **The Red Planet is about to be spectacular! **

>>

>> This month and next, Earth is catching up with Mars in an encounter

>> that

>> will culminate in the closest approach between the two planets in

>> recorded history. The next time Mars may come this close is

>> in 2287. Due to the way Jupiter's gravity tugs on

>> Mars and perturbs its orbit, astronomers can only be

>> certain that Mars has not come this close to Earth

>> in the Last 5,000 years, but it may be as long as

>> 60,000 years before it happens again.

>>

>> The encounter will culminate on August 27th when

>> Mars comes to within 34,649,589 miles of Earth and

>> will be (next to the moon) the brightest object in

>> the night sky. It will attain a magnitude of - 2.9

>> and will appear 25.11 arc seconds wide At a modest

>> 75-power magnification

>>

>> ****

>> **Mars will look as large as the full moon to the naked eye** .

>> **Mars will be easy to spot. At the

>> beginning of August it will rise in the east at 10p.m.**

>> **and reach its azimuth at about 3 A.M.

>>

>> By the end of August when the two planets are

>> closest , Mars will rise at nightfall and reach its

>> highest point in the sky at 12:30a.m . That's pretty

>> convenient to see something that no human being has

>> seen in recorded history. So, mark your calendar at

>> the beginning of August to see Mars grow

>> progressively brighter and brighter throughout the

>> month.

>> Share this with your children and grandchildren. **

>>

>> **NO ONE ALIVE TODAY WILL EVER SEE THIS AGAIN ***

>

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