Wandering through the realms of the cosmos, pondering its huge vastness

Posts tagged “hyades

Moon and Jupiter – January 22, 2013

Last January 22, 2013, the waxing gibbous moon appeared near the bright planet Jupiter in the evening sky.

As seen from the Philippines, the Moon and  Jupiter made a close approach within roughly 5 degrees of each other. Some folks in the Southern Hemisphere, however have seen Jupiter completely disappear behind the moon – an occultation.

During this event, the Moon was at mag -12.3, and Jupiter at mag -2.6, both in the constellation Taurus.

The sky condition was mostly cloudy. When the clouds parted, I was able to a couple of wide angle images which includes the two famous star clusters in Taurus — the Hyades and the Pleiades. In another image, the moon was shot at two different exposures to show the amount of separation between it and Jupiter.

Images were taken from Bulacan, Philippines around 8:40 – 9:00 pm PHT.

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Venus, the Pleiades and Hyades

Image

Tonight, the planet Venus shining bright in the western sky appeared close to the dipper-shaped open star cluster, Pleiades.

Just above them was the V-shaped Hyades, another noticeable cluster. In mythology, the Hyades are the half sisters to the Pleiades, the daughters of Atlas.

Image taken with Nikon D60 DSLR camera (24 mm, f/5.6, 20 sec. exp. at ISO 1250).

More photos below:

(From bottom to top) Jupiter, Venus, the Pleiades, and the Hyades.

The streak of light was an airplane which happen to pass in between Venus and the Pleiades while the shot was being taken


Enjoy November’s Blue Moon

This month’s full moon on the 22nd is a Blue Moon, but don’t expect it to be blue — the term has nothing to do with the color of our closest celestial neighbor.

In the 21st century, the term Blue Moon has two meanings. According to the popular definition*, it is the second Full Moon to occur in a single calendar month. The Old Farmer’s Almanac on the other hand defined a Blue Moon as the third full moon in a season with four full moons. Both definitions are now widely accepted.

The November 22, 2010 Blue Moon is the third of four full moons between the September 2010 equinox and December 2010 solstice.

The relative rarity of this phenomenon is the reason why the idiomatic expression “once in a blue moon” is used to describe the rarity of an event.

Blue moons have no astronomical significance, Greg Laughlin, an astronomer at the University of California, Santa Cruz told Inquirer.net. “‘Blue moon’ is just a name in the same sense as a ‘hunter’s moon’ or a ‘harvest moon,’” according to him.

However, this month’s Blue moon will be more notable because the spectacular open star clusters, the Pleiades and their sisters the Hyades would be seen just about 10 degrees away from the Full Moon on that night.

Blue Moon, the V-shaped Hyades and the blue stars of Pleiades on Nov. 22, 2010 at 8 PM local time (Click to enlarge)

To most meteor shower enthusiasts and lunar photographers, a Full moon is less interesting because it interferes with meteor shower observations due to its brightness. This also makes the moon look flat, making the shadows of the lunar craters and mountains hard to see.

Anyway, here are ways to enjoy a Full Moon’s night from amateur astronomer, AstroBob .

Full Moon during the Partial Lunar Eclipse last June 26, 2010

There’s always so much interesting history to learn about the Moon and how we view it from Earth, and learning about it makes me appreciate the Moon just a little bit more each time I look at it.
So relax and enjoy the gorgeous sight of this month’s Blue Moon and try to do something special to mark this event on the night of November 22. 😛
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* The idea of a Blue Moon as the second full moon in a month stemmed from the March 1946 issue of Sky and Telescope magazine, which contained an article called “Once in a Blue Moon” by James Hugh Pruett. Pruett was using a 1937 Maine Farmer’s Almanac, but he simplified the definition. He wrote: “Seven times in 19 years there were — and still are — 13 full moons in a year. This gives 11 months with one full moon each and one with two. This second in a month, so I interpret it, was called Blue Moon.”

Later, this definition of Blue Moon was also popularized by a book for children by Margot McLoon-Basta and Alice Sigel, called “Kids’ World Almanac of Records and Facts,” published in New York by World Almanac Publications, in 1985. The second-full-moon-in-a-month definition was also used in the board game Trivial Pursuit.  source: EarthSky.org