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Sunday, December 19, 2010

North America to be Treated to Total Lunar Eclipse on Dec. 20-21, 2010

Total eclipseImage via Wikipedia
(Apologies: I mistakenly wrote Dec. 21-22. The correct date is above, early Tuesday morning on East Coast of the US, late Monday night on the West Coast.)

Observers in North America, Central America, and Hawaii will be treated to a total lunar eclipse on the night of the winter solstice, December 20 - December 21. Unfortunately, the eclipse will not be visible in Israel or the Middle East. Totality begins at 2:41AM EST and ends at 3:53AM EST on December 21, so observers on the West Coast will be able to see it at a much more reasonable hour. Partial phases of the eclipse begin about 1 hour before and after totality.

The last time a total eclipse of the moon occurred during the winter solstice was December 21, 1638AD, the year John Harvard died and left his library to the two year old university that would be named after him. So, if you are into rare, coincidental astronomical events, you won't want to miss this one. The next one won't be until December 21, 2094, not so long to wait but an event you can't bet you'll see.

Here are the circumstances of the eclipse:

Source: Sky and Telescope Magazine

This should be a beautiful event, with the moon high overhead on a frosty winter night. The eclipse is entirely visible by the naked eye, so just go outside and enjoy, although any optical aid, such as binoculars, will enhance your enjoyment. Since it is cold in many places at this time, you may be able to view from indoors, if you have a window from which the moon is visible. The moon will be nearly overhead, so perhaps a skylight would work best.

Clear skies and fair viewing.

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Thursday, December 16, 2010

Our Winter Clouds

Fair weather winter clouds in the Negev are almost always thin cirrus. These thin clouds are white to light grey ice crystal clouds that cross but do not cover the sky. These clouds form when there is moisture at high levels and the temperature there is colder than freezing.

Thin cirrus over Mitzpe Ramon

In the evening these clouds, however thin, can always be noted by the circular rainbow they create around the moon, the result of the ice crystals refracting the moon's light. These clouds can also be quite deceptive, since they leave large portions of the sky uncovered and when very thin are invisible at night except for the dimming of the stars they cause. But once you get into a dark zone, you can immediately see they are trouble. A number of times I have gone out to my dark sky location, only to notice high, thin cirrus after arriving. But it's a small price to pay for the mostly clear, clean skies we have here in general.

Thin cirrus over the Club Ramon Hotel

Wishing you clear skies and fair viewing.

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Wednesday, December 15, 2010

We Hit the Geminids Jackpot

After being clouded out on Monday night December 13, I put my hopes on Tuesday night/Wednesday morning to get a view of the Geminids meteor shower this year. We were not disappointed. Although there was a slight haze in the early evening, by 11:00 PM, when we were heading out, the skies had completely cleared and the winter constellations shined brightly overhead.

We threw our camp pads and sleeping bags in the car, together with my 80mm Brandon wide-field telescope and eyepieces, and headed up to our dark sky site just outside of Mitzpe Ramon. I brought the telescope just in case I decided to do some deep sky viewing, but it is not at all needed to observe a meteor shower. In fact, one of the beauties of a meteor shower is that all you need to see it best are your two eyes and a dark sky location, both of which we have in ample measure in Mitzpe Ramon.

I was quite confident we would get a good show, but I was not prepared for just how good it was. Although the peak of the meteor shower was scheduled for the previous night, the actual time of the peak was 13:00 UTC on Tuesday (15:00 Local Israeli Time). So, Tuesday night around midnight was actually closer to the peak time than the night before. Also, the Geminids, unlike the other great shower of the year, the Perseids, has a very broad peak, spread out over a longish period of time.

We threw our pads on the ground, spread out our sleeping bags and hopped in, waiting for our eyes to adapt to the dark and the show to begin. Although the first quarter moon was still visible, we immediately began to count lots of meteors. Donny, my observing buddy, counted 34 meteros in the first hour, despite the moon light. After the moon went down around 12:45AM, the meteors intensified. They were mostly very bright, with medium length trails, moving at moderate to fast speed, and bright white in color. We saw one fireball, which illuminated the entire area during its brief passage, and was accompanied by a dimmer twin, that fell in parallel beside it. On a number of occasions the meteor's train was illuminated by the ionized gas it left in its path, brightening and dimming as it quickly fell through the sky.

Our Geminids meteor count, by the quarter hour, December 14-15, 2010

We were delighted with the show, which was one of the best I have seen. Other observers report it one of the best meteor showers of the last 10 years. It is still not too late to view it, as many meteors from the shower will continue to be visible through December 17, although in smaller numbers than previous nights.

Lying on the ground in our sleeping bags under a star-filled sky, watching the shooting stars, called to mind that not far from this place, G-d took Abram out under the night sky to show him these stars and demonstrate how numerous his descendants would be. Not far from this place, under a sky very much like the one we watched, Abraham began his journey to sacrifice his son Isaac, which would end the generations to come that G-d had promised him under this same night sky. Not far from this place, under a sky filled with the same stars, Jacob, Isaac's son, would flee from the wrath of his brother Esau, lie on the cold hard ground as we did, and dream of angels ascending and descending a ladder. And not far from this place, in the middle of the night (va'yehie be'chatzie ha'lahylah) under a sky filled with stars that looked like our own, Moses would take the Children Of Israel out of Egyptian bondage to the very self-same land that we were lying on.

Such are the thoughts on an astronomical evening in the Holy Land.

Clear skies and fair viewing.
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Tuesday, December 14, 2010

Geminids - Skunked by Clouds on Monday Night

The worst dust storm in many years began subsiding Monday afternoon, raising my hopes that we would have calm and clear skies for the peak of the Geminids meteor shower. However, early in the evening a slight rainbow encircling the first quarter moon did not bode well for the evening. By midnight, the sky looked like it might clear, so I dressed warmly, packed my small Brandon 80mm wide-field refractor and eyepieces, threw the sleeping bag and camping mattress in the back of the car, and headed up the hill to my favorite observing site.

By the time I arrived a thin cloud cover had moved back in, and high cirrus clouds covered a mackerel sky.  Despite the clouds which made the constellations look totally unrecognizable, I spotted 8 meteors in 20 minutes. This bodes well for a very strong showing of the Geminids this year. However, within an hour of my arrival, the cloud cover thickened and I beat a retreat to wait for tomorrow night. The Geminids have a very broad peak, so observing on Tuesday and Wednesday nights should prove rewarding as well.

If you have clear skies, I hope you've been outside watching the best meteor shower of the year. No optical equipment is needed. Just your eyes and the patience to watch the night sky.

Good viewing!

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Sunday, December 12, 2010

Dust Storm Update for The Geminids Meteor Shower

Sunday
December 12, 2010

The dust storm that started on Saturday continues unabated into Sunday afternoon and evening, with temperatures dropping and the wind continuing in full force. At 1:30 PM the conditions were:

Temp: 45 F
Wind Chill: 35 F
Avg. Winds: 20 MPH
Gusts: 34 MPH

I attempted to make this report from downtown Mitzpe Ramon, but all you can hear is the wind and my muttering something about the Geminids meteor shower:



The storm is supposed to begin tapering off by Monday noon, so it will be touch and go for the weather on Monday night when the Geminids peak.

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Succah in the Desert

Not far from Mitzpe Ramon is a rustic retreat where you can stay, isolated from civilization and all modern communications. It is called Succah Ba'Midbar (Hut in the Desert). It is located in a hidden valley just below the Wise Observatory.

Panoramic view of Succah Ba'Midbar

The buildings are all very rustic, built of succah materials. There is a central hut which has a home kitchen and large eating area, where guests are treated to home made meals. It is all very cozy and conducive to reflection and introspection. You can get cell phone reception if you climb one of the nearby hills; otherwise there is no telephone, TV, or Internet access.

Kitchen, dinning room, and common room of the Succah Ba'Midbar

Inside the dining room and common area

There are no electrical lights outside. Guests get kerosene lanterns to see at night, or else can use flashlights if they bring any. All electricity is generated via an array of solar panels. I don't know if the guests huts have electricity. I didn't think to ask. But without communications, who needs it anyway? Heat is provided by way of wood burning stoves.

Guest hut at Succah Ba'Midbar

One nice thing is that the Succah Ba'Midbar is located close to the Wise Observatory and our favorite viewing location above Mitzpe Ramon.

The Wise Observatory from a location near the Succah Ba'Midbar

For a different lodging experience you should give Succah Ba'Midbar a try. And don't forget to go observing with Astronomy Israel when you do!


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