Difference between revisions of "June 18, 2004"

From LPOD
Jump to: navigation, search
 
(3 intermediate revisions by the same user not shown)
Line 1: Line 1:
 
__NOTOC__
 
__NOTOC__
 
=Frigid Buddies: Aristoteles and Eudoxus=
 
=Frigid Buddies: Aristoteles and Eudoxus=
 +
<!-- Start of content -->
 
<table width="640"  border="0" align="center" cellpadding="6" cellspacing="2">
 
<table width="640"  border="0" align="center" cellpadding="6" cellspacing="2">
 
<tr>
 
<tr>
Line 21: Line 22:
 
Cristian's low Sun view was obtained May 25, 2004 when the seeing was excellent. He used a 25 cm Newtonian telescope with a Vesta Pro webcam; 300 out of 450 frames were combined with the IRIS software.</p>
 
Cristian's low Sun view was obtained May 25, 2004 when the seeing was excellent. He used a 25 cm Newtonian telescope with a Vesta Pro webcam; 300 out of 450 frames were combined with the IRIS software.</p>
 
<p class="story"><b>Related Links:</b><br>
 
<p class="story"><b>Related Links:</b><br>
[[iv_098_h3.jpg| Aristoteles:  Lunar Orbiter IV View]]<br>
+
[http://www.lpi.usra.edu/research/lunar_orbiter/images/img/iv_098_h3.jpg Aristoteles:  Lunar Orbiter IV View]<br>
[[iv_098_h2.jpg|Eudoxus: Lunar Orbiter IV View ]]
+
[http://www.lpi.usra.edu/research/lunar_orbiter/images/img/iv_098_h2.jpg Eudoxus: Lunar Orbiter IV View ]
 
</p>
 
</p>
<p class="story"> <b>Tomorrow's LPOD:</b> Janssen</p>
+
<p><b>Yesterday's LPOD:</b> [[June 17, 2004|Marsh of Epidemics]] </p>
 +
<p><b>Tomorrow's LPOD:</b> [[June 19, 2004|Janssen]] </p>
 
</table>
 
</table>
 
<!-- start bottom -->
 
<!-- start bottom -->
Line 47: Line 49:
 
<!-- Cleanup of credits -->
 
<!-- Cleanup of credits -->
 
<p>&nbsp;</p>
 
<p>&nbsp;</p>
----
+
<!-- End of content -->
===COMMENTS?===
+
{{wiki/ArticleFooter}}
Register, and click on the <b>Discussion</b> tab at the top of the page.
 
<hr>
 
<!--
 
You can support LPOD when you buy any book from Amazon thru [[Support_ LPOD|LPOD]]!
 
-->
 
<span style="font-size:88%">
 
<center>
 
Contributions to http://www2.lpod.org/ are licensed under a Creative Commons Attribution No-Derivative-Works Non-Commercial 3.0 License. [http://www.creativecommons.org/licenses/by-nc-nd/3.0 http://www.wikispaces.com/i/creativecommons/by-nc-nd_3.0_80x15.png]<br>
 
</center>
 
</span>
 

Latest revision as of 22:39, 8 February 2015

Frigid Buddies: Aristoteles and Eudoxus

LPOD-2004-06-18.jpeg

Image Credit: Cristian Fattinnanzi

Frigid Buddies: Aristoteles and Eudoxus

Aristoteles and Eudoxus are two of the largest young craters in the north polar region of the Moon. Aristoteles is 87 km wide and Eudoxus has a diameter of 67 km. These craters look pretty similar, both have terraced walls and hilly floors, apparently veneered with some smooth material - perhaps impact melt. Which is youngest? The larger crater has radial ejecta and secondary craters on nearby Mare Frigoris. These are seen more clearly on the Lunar Orbiter IV frame. Because Eudoxus formed on rubbly Imbrium ejecta, its secondary craters are harder to recognize. The US Geological Survey assigns Eudoxus a stratigraphic age of Copernican, whereas Aristoteles is Eratosthenian. This means that Eudoxus is younger than 1.1 billion years old, and Aristoteles is somewhere between 1.1 and 3.2 b.y. old. Since both craters have about the same number of superposed (subsequent) impact craters, the two craters must be very near the Copernican-Eratosthenian boundary, with one slightly older and the other slightly younger.

Technical Details:
Cristian's low Sun view was obtained May 25, 2004 when the seeing was excellent. He used a 25 cm Newtonian telescope with a Vesta Pro webcam; 300 out of 450 frames were combined with the IRIS software.

Related Links:
Aristoteles: Lunar Orbiter IV View
Eudoxus: Lunar Orbiter IV View

Yesterday's LPOD: Marsh of Epidemics

Tomorrow's LPOD: Janssen


Author & Editor:
Charles A. Wood

 


COMMENTS?

Register, Log in, and join in the comments.