Copernicus and Clavius

From “Atlas of the Moon:”

“The crater Copernicus is undoubtedly one of the best-known and most typical of lunar formations; it is also a center of bright rays which can be traced across the surface of Mare Imbrium.  To the west of Copernicus (to the right in the picture) is a group of scattered solitary hills, which rise to a height of several hundred meters.”

In regards to Clavius…

“The limb area of the Moon adjacent to the South Pole is densely covered by craters and large walled plains.  The terrain is mountainous and the foreshortening close to the Moon’s limb and deep shadows make observation and mapping of this area very difficult.”

“Small craters inside Clavius are suitable objects for testing the resolution of small telescopes.”

These images were taken with the 11 inch Celestron EdgeHD and an Imaging Source camera at a focal ratio of F10. The best of 1000 photos were stacked using Autostakkert software.



Jupiter 4/18/2016


This greyscale image is a stacked composite the best 50 of 1000 photos taken through the 11 inch Celestron EdgeHD with an Imaging Source video camera.  Three moons are visible, Io and Ganymede on the right and Europa on the left.  Jupiter is 437 million miles distant and was at an altitude 44 degrees above the horizon in Prescott, Arizona’s Southern sky when this was taken.  I can see the faint outline of Jupiter’s famous red spot around the left side of the equator.

From by contributor Elizabeth Howell 5/15/2014…

“Jupiter’s Great Red Spot — the most powerful storm in the solar system — is at its smallest observed size yet, and scientists aren’t sure why.

Recent Hubble Space Telescope images of the storm show that it is now 10,250 miles (16,496 kilometers) across, which is less than half the size of the storm in the late 1800s. At one point, scientists theorized that three Earths could fit inside the Great Red Spot, but today, only the width of one Earth could fit within the raging tempest.”

“As the spot diminishes, its shrinkage rate appears to be accelerating. Amateur observations from 2012 show the storm’s “waistline” is reducing by 580 miles (933 km) a year, a little less than the driving distance from New York City to Cincinnati.”