Watching Shadows

     Watching the birds on the feeder outside the window, their colors become so much brighter as the shadows move away from them. The details of the feathers become more noticeable. The red hood on the woodpecker “pops” and the bright blues of the Blue Jay's feathers stand out against the brown of the trees. You can easily distinguish between individual birds!

    Whenever a photograph is taken, shadows and light make up what we see on the paper. (or on the screen) The composition of a good shot involves positioning the lights and darks in a pleasing way.

    The earth’s rotation as it orbits around the sun brings us into the earth’s shadow every night. Day and night depend on where the sun is in relation to us. When we see a Lunar Eclipse, we are watching as the earth’s shadow moves across the surface of the moon. When we see a Solar Eclipse, we are watching as the shadow of the moon passes across the earth’s surface.  The sun is being hidden by the moon.

    On a separate note, isn’t it amazing that the orbit of the moon and the size of the moon is just right to completely cover the sun? If the moons orbit was further away from the planet, we wouldn’t get complete coverage. For that matter, isn’t it neat that the orbits coincide with each other to properly line up to provide these events!

    Here’s another note for you…On April 8^th, 2024, we here in the Pittsburgh area will be treated to a nearly complete solar eclipse. (Approximately 95% of the sun will be covered from here) By driving north to the area around Erie, we will be able to see a complete solar eclipse! 100%!!! The shadows path cuts across more than just the Erie area, there are plenty of places you can go to see this event! If you can do it, I’d suggest making that drive! You will be inside the shadow of the moon! The surrounding area will be dark even though it will be the middle of the day! Mark your calendars! Don’t miss it!

The Chinese S.S. (Tiangong) going from west to east (R to L) at top of picture

(Click to enlarge)

Tiangong disappearing as it passes over the Pleiades

    I experienced another example of the earth’s shadow a couple nights ago. There was a pass of the Chinese Space Station (Tiangong) going over Pittsburgh. After it passed overhead, it started to fade and then disappeared from view. It had just passed into the earth’s shadow. While it was visible, about 250 miles above us, the sun was shining on it and illuminating it. Since it is so far away, no details could be seen, just a bright star like point of light traveling across the sky. When its orbit took it into the shadow, it appeared to disappear.  There one minute and gone the next!

    There are lots of satellites which orbit the earth, many which can be seen without any optical aid. Two of them, Tiangong and the ISS (The International Space Station) have crew members living on them! You can get an idea of when they will be passing over your area by checking various apps and web sites.

 I use Heavens-above.com to see what’s going over my house.

    You know that it doesn’t take a lot to excite me. I find that something to be proud of! Things like watching shadows of Jupiter’s moons crossing the planet’s surface. Seeing the peaks of mountains on the moon being illuminated by the sun while their bases wait in the shadows for the sunshine to reach them is always cool to see. Simply watching the shadows on the hillside across the valley slowly rise up the hill as the sun gets lower and lower can be exciting.

    Watching the shadows move across the snow in the back yard, I can’t help but think, it is such a neat world we live in! There are so many interesting things we see every day. So, keep your eyes open, who knows what we might see next?