Two Weeks: To Be Eclipsed

On August 21, a total solar eclipse will cross over North America, from coast to coast. What makes this more of a rare event, the path of totality will be entirely over continental United States. The narrow band will stretch from Salem, OR to Charleston, SC. A partial eclipse will be seen outside the band of totality. How much of a partial eclipse will be seen by those outside the band of totality is determined by how close they are to the band.

eclipse map courtesy of NASA

In Colorado, for example, the partial eclipse will range from 85% (NM border) to 95% (WYO border). The last total eclipse through the western states was in October 1978. At that time, the partial eclipse was around 85%. In terms of light, it was similar to what one would expect at the beginning of evening twilight with longer shadows. With the coming eclipse, observers in Colorado should expect the same. If it is overcast, it should be darker – with the level of darkness determined by the thickness of the overcast.

Seeing with my eyes

Under any circumstance, do not observe the sun without proper eye protection. If you choose to use eclipse glasses or viewers, it must be ISO-12312-2 compliant (meaning it meets the minimum safety standard to directly view the sun). The American Astronomical Society (AAS) has developed list of reputable vendors, which can be found here.

The low cost (free), DIY approach is to make a pinhole viewer, consisting of a cardboard box (smaller the better) and an unused piece of bright white, multipurpose paper. Make a pinhole in the cardboard box, the white piece of paper is the projection screen. Before the eclipse, practice lining up the cardboard box over the paper. What you are looking for is the brightest amount of light coming through the pinhole.

DIY: pinhole eclipse viewer parts with spatial analysis test

If you have a telescope, there is a good chance it came with a sun filter for your eyepiece. Line up your telescope without using your finderscope, which is fairly easy. With the sun filter in your eyepiece, line up your telescope before the eclipse begins. If your telescope came with a solar projection screen instead of a filter, it is the same process like using a pinhole viewer.

The super-safe way of following the eclipse is to watch NASA, online or their TV channel (DISH Network and DirecTV). You’ll also receive a science lesson on the side.

Photographing the solar eclipse

Photographs of a solar eclipse cannot be beat. If that is your plan, the plan should be nearly complete in terms of equipment and practice. If not, Canon USA has assembled a reference guide to photograph the eclipse – from an introduction to eclipse photography to equipment to site preparation.

Eclipse Extra: Tonight – Partial Lunar Eclipse

Whenever the Earth, the sun and moon line up for an eclipse, on occasion, the eclipse will come as a pair. Tonight, during the full moon phase, a partial lunar eclipse will occur. The partial eclipse will come around sunset for those in eastern Europe and Africa, and before sunrise on August 8th in the Far East and Australia. In North America, no partial lunar eclipse will be seen.

Online Resources

 

Fire In The Sky: Super Moon

With the heavy, smoky haze in the sky from the West Fork Fire Complex in southwestern Colorado, this year’s super moon would certainly take on a different appearance. Fortunately, it did not disappoint.

 

Saturday evening

Along with the smoke, there were some clouds passing through the south-southeastern sky where the moon would be rising. It wouldn’t be the smoky haze obscuring the moon, but the clouds instead. For roughly 20 minutes, the moon was hidden behind a patch of clouds. After the last batch of clouds passed, the moon had a clear sky to shine brightly.

about 30 minutes after moonrise

 

about 35 minutes after moonrise

 

moon hidden by the passing clouds

 

the last clouds passing across the moon’s face

 

the moon shining in a clear, but hazy sky

 

Sunday evening

There wasn’t much of the smoky haze in the sky. Seeing an orange-reddish tinted moon was unlikely. The cloud cover, however, was rather extensive. The sky, though, started to clear quickly in the south-southeastern sky before sunset.  With plenty of clear sky, observing the moon would be very good.

about an hour after moonrise

 

about an hour, 5 minutes after moonrise

 

With fire conditions expected to worsen over the course of this week, it’s likely the moon will have an orange-reddish tint as the moon begins its journey through the waning phases. How much of the moon we’ll see will depend upon the amount of smoke put into the air by the West Fork Fire. Last Thursday night, the moon wasn’t seen at all due the dense smoke layer that had migrated over the region.

Man on the Moon

Apollo 17 was the last manned mission to the moon, and today marks the 40th anniversary of the third and final walk of that mission. Since that last walk, we observe and admire the moon from the ground …

 

 

 

 

 

Hopefully, one day, we’ll return to the moon.

 

To read more on the Apollo 17 mission, please read here and here.

Moon Rise, Moon Set

Last night, we had a clear sky. With the Harvest Moon quite prominent in the night sky, it was a ready subject for a photo shoot …

moon rise

the moon rising above the horizon (7: 48 pm, Oct 01 2012)

moon higher in the sky

an hour and a half later, the moon had shed her orangey color (9:09 pm, Oct 01 2012)

moon set

with the early morning light beginning to fill the sky, the moon begins it process of setting (7:07 am, Oct 02 2012)

For a closer view of the Harvest Moon, please visit here.