A Walk in the Park

Several hours without transportation. My vehicle is in the transmission shop for a checkout, have been having some rough shifts. Stranded for the morning without wheels in the old industrial area I had no intention of sitting in the shop’s waiting area for a few hours.

Old Airport Beach Park Kona
Looking down the old runway at the Old Kona Airport Recreation Area
Just up the coast from the old industrial area is a large beach park. Called Old-A’s or Old Airport, it is the site of the original landing strip just north of town. Abandoned when the jet age rendered this airstrip far too small. The area was used for a while as a drag-strip, the old airport was eventually converted to a park. The old terminal building was renovated into a multi-use pavilion. The old runway is still there, now an enormous parking lot that fronts the rocky shoreline along one side and a community garden on the other.

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Venus Exits the Evening Sky

Over the next week Venus will be lost to the Sun’s glare. It is currently about 15° east of the Sun, but getting closer quite quickly now and becoming tough to spot in the sunset. The planet will pass through inferior conjunction on March 25th. The planet will appear in the dawn sky around mid April. When it does appear, it will spend the remainder of 2017 as the morning star.

Crescent Venus
Venus approaching inferior conjunction, 24Dec2013
Even when low in the sunset, Venus is worth picking up in a telescope. As the planet approaches inferior conjunction it shows an ever more crescent appearance to our earthbound vantage point. During the last days of visibility it will be a razor thin crescent, worth the effort to look.

Venus Events for 2017

  Date UT Separation Mag
Maximum Elongation Jan 12 47.1°E -4.4
Inferior Conjunction Mar 25    
Maximum Elongation Jun 3 45.9°W -4.3
 
Source: NASA Sky Calendar

Mercury at Superior Conjunction

Today Mercury will be at superior conjunction. After today the planet will reappear in the evening sky, rising high enough from the Sun’s glow to be seen around the end of the month.

Mercury Transit 9May2016
Mercury transiting the Sun on May 9, 2016. Celestron C8 and Canon 6D at f/10.
Superior conjunction is when the planet passes around the far side of the Sun as seen from Earth. For a few weeks the planet will be lost in the Sun’s glare, hidden from view.

As Mercury is on an orbit inside that of Earth’s it will see both inferior and superior conjunctions as it passes from the evening sky to the dawn sky and back again.

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Kelvin-Helmholtz Waves

When two bodies of fluid are moving in different directions interesting things happen at the boundary. The result is usually some sort of wave… Waves on the surface of the ocean or waves in the sky.

Waves on the sea surface are easy to see. Waves in the sky? Not so much. These waves are only betrayed if clouds form in the waves, revealing these structures.

Kelvin-Helmholtz Waves in the Saddle
Kelvin-Helmholtz Waves in the Saddle with Mauna Loa in the background. Photo by Joe Gargiulo, used with permission
This sort of wave is called a Kelvin-Helmholtz wave after Lord Kelvin and Hermann von Helmholtz who first investigated how these waves form. Yes this is the same Kelvin for whom the units of temperature are named. KH waves are visible all around us for those who know to look, from the surface of our ocean to the clouds of Jupiter, these characteristic swirling patterns are seen.

In the Saddle region over Mauna Kea and Mauna Loa, there are usually two air masses moving in different directions. Below the inversion level the tradewinds push westward. While above the inversion level, usually about 6-7,000ft, the upper air moves to the east. Where these two meet there are often KH waves, and occasionally some clouds to outline these fascinating structures.

Circuitry Gallery

The TMT Contested Case Winds Down

We are now in March, looking back to October when the TMT contested case began. Five months of hearings endlessly repeating the same details about every aspect of the case.

Yes… My patience has run out long ago.

Retired Judge Riki May Amano
Retired Judge Riki May Amano presides over the TMT contested case hearing
After all that has been said and done it is clear that the actual substance of the case could have been thoroughly discussed in a couple weeks, not five months.

Among the endless hours of testimony there have been occasional moments of fireworks. We have heard wild theories, mangled science, inexcusable ignorance, evidence of unemployment claims fraud, and several very likely incidents of outright perjury by telescope opponents.

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