Dislikes and Likes

In a recent post by fellow blogger The Belmont Rooster, he described his list of things he dislikes most. Near the top was getting stuck as in mud or snow on his family farm. I commented how it would be interesting to see the rest of his top 10 list. He obliged and posted the rest of his list. Many of his dislikes are coupled with things he is thankful for in order to counteract the negativity. He is a very positive person. Below are my own lists, not in any particular order and certainly not exhaustive. Feel free to add some of your own down in comments.


1. Thorns, especially on locust trees. A finger poke swells and hurts for at least 2 weeks. I do like the shade the trees give the house in summer afternoons.

2. Cancer. We are making progress.

3. Liars. I can’t think of a positive.

4. Colds. There is medicine to help cope.

5. Platelet donation needle in the arm. People are being helped by the donations.

6. When deer eat my flowers. Can’t think of a positive.

7. Ads and commercials. It is a source of income.

8. Wasted food and resources. No positives here.

9. Hypocrites. There is a slim chance they might change.

10. 24/7 news, fake news, social media. I can turn it off and do something else.


1. My family

2. People who help others

3. Good teachers

4. Smiles and Hugs

5. A warm bed

6. Chocolate

7. Science

8. Astronomy

9. Art and creativity

10. Guitar and the blues



Solargraphs 1&2 | Long Exposure Images

Photography lets us capture a scene or see how others view their world. Several bloggers I follow include beautiful and creative images in their posts. Blogger Mike Bizeau publishes daily photos in Nature Has No Boss. Have a look. Once in a while, he posts what is called a solargraph. An internet search yields many sites about them. This one is good.

The technique uses a pinhole camera, light sensitive photopaper, and very long exposure to capture a scene. Many of the solargraphs last for weeks or months and capture tracks of the sun across the sky during many of the days. Here is a nice example from Solargraphy.com.

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Earth’s Warming Climate

The year 2018 ranked as the fourth warmest since 1880. The three warmer years were 2016, 2017, and 2015 according to scientists at NASA’s Goddard Institute for Space Studies (GISS).

“2018 is yet again an extremely warm year on top of a long-term global warming trend,” said GISS Director Gavin Schmidt. Since the 1880s, the average global surface temperature has risen about 1°Celsius (2°F). According to Schmidt and colleagues, this warming has been driven in large part by increased emissions of carbon dioxide and other greenhouse gases into the atmosphere through human activities.

Surface temperature measurements of the Earth by NASA come from 6,300 locations. They include weather stations, ships and buoys at sea, and Antarctic research stations. The measurements produce the global average temperatures during the year. The baseline period from 1951 to 1980 is used as the mean value for comparison. The difference between the current readings and the 1951-1980 mean is accurate to within 0.1˚F with a 95% certainty level according to NASA.

This chart plots the monthly annual values from 1880 to 2018. Each time a record warm annual mean is set, it displays the year in the right margin. The most recent decades show rapid increases in the annual mean. It will cycle through the values a few times. Reload to see it again.

NASA Earth Observatory | Joshua Stevens | Goddard Institute for Space Studies

Scientists from multiple agencies agree on the rising temperature trend. The following plot shows annual mean variations from the 1951-1980 mean. Annual variations clearly stand out as wiggles in the plot. The steeper warming trend since 1980 is clear.

Five agencies are plotted together: NASA, NOAA, the Japan Meteorological Agency, the Berkeley Earth research group, and the Met Office Hadley Centre (UK). They all show the same trend and closely match the annual variations of each other.

NASA Earth Observatory | Joshua Stevens | Goddard Institute for Space Studies

I am encouraged when I read that more people believe global warming is taking place. Presently, about 70% of those in the U.S. agree. My post on the Yale public opinion survey is here. Are we going to do anything about it? Individually, we can take measures to reduce the carbon footprint of ourselves and homes. That isn’t enough.

Will our government agencies take on the challenges to guide the country toward better outcomes for the sake of our children and grandchildren? Will our nation join others to mount a global effort? At this time, I don’t see it happening. We should be leading the way with ideas and technologies. Give people direction. Motivate companies to be innovative about reducing the carbon footprint we impose upon this planet. How great would that be to see such a revolution? It could stimulate the economies of the world and give future generations a more livable planet.

Looking back from sometime in the future, will we see ourselves rising to meet the challenges? Or, will we merely see more people recognizing that they are in a worsening situation and doing nothing about it?

Gathering of Intelligence | Solvay 1927

I taught physics to high school students for my career. Names of important people in the history of physics, chemistry, and other sciences were always included in our textbooks and discussions. These people laid the foundation for what we believe today about how the world works.

In 1927, many of those individuals gathered for the Solvay Conference in Brussels. The colorized photograph below may have captured the most intelligence in one place and time the world has seen. Of the 29 attendees, 17 had won, or would go on to win, the Nobel Prize. Notable in the front row is the only woman at the conference, Marie Curie. She had won two Nobel Prizes in physics and in chemistry.

The primary mission of the conference was to discuss the impact of a new theory embraced by the man at the far right in the second row. The scientist Neils Bohr strongly supported the theory of quantum mechanics. He and Werner Heisenberg argued for what is called the Copenhagen Interpretation. In it, physical systems have a set of probabilities of outcomes if they are going to be measured. The act of measurement causes that set of possible probabilities to reduce to one outcome. Albert Einstein, center front row, did not like the idea of probabilities in nature. He said “God does not play dice”. Bohr replied “Einstein, stop telling God what to do”. Quantum mechanics is widely accepted today and is applied in many aspects of our lives.

The scientific contributions by each of the pictured individuals are described at this link. Scroll part way down that page to find them.


Viewing Heavenly Bodies | 2019

🔭  Updates an earlier post to include recent changes and new information.  🔭  

Desktop planetarium software helps plan viewing sessions and keep track of the planets and Moon. Many products are available for all computer platforms and smartphones. A Google search yields links to many sources. Open source and free Stellarium is on my desktop computer. It can be customized to your location and has a nice look and feel. For Android and Mac phones and tablets, I like SkySafari. It isn’t free but is inexpensive.

Online planetarium sites are popular and offer many features. Below are highlights of a few I like. With multiple features, a unique look and feel, and different levels of detail, they can help satisfy your curiosity about astronomical events. I welcome reader questions or reviews about using these tools or others you find helpful.



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An Opportunity To Be Missed

I knew it would happen someday. NASA officially declared the Mars Opportunity Rover mission was over. It was active for nearly 15 years and had driven more than 26 miles exploring craters, various rock features, and the weather. Last year, a global dust storm on Mars darkened the skies for many weeks. Opportunity went into a hibernation to save power. After the dust settled and the sun returned, multiple efforts to make contact failed. This is the final transmitted image back in June 2018.

Previously in 2010, Spirit, the other identical rover, had succumbed to the harsh Martian conditions. Both were launched in 2003. They landed with the aid of airbags to soften the impact. They were ‘warranted’ for 90 day missions. Spirit exceeded that by 20x.

Randall Munroe of xkcd published a nice commemorative cartoon for the occasion. Thanks to the intrepid rover for taking us along during its explorations.

Randall Munroe | xkcd.com

NASA published this short video showing some of the highlights of the Opportunity mission.

Dial-a-Moon | 2019

How will the Moon look on any date in 2019? What will it look like on your birthday? Find out at NASA Dial-a-Moon. Here is Dial-a-Moon for southern hemisphere readers.

8 Feb 2019

Enter any month and day to see a high definition image. The composite images of Dial-a-Moon are made from those of the Lunar Reconnaissance Orbiter (LRO) in low altitude orbit around the Moon since 2009.

You may leave the universal time (UT) at the default value. Your local to Universal time conversion can be done at this link. Or, type ‘universal time’ into Google. Go back to Dial-a-Moon to enter the UT.

A Year of Moon Motions

The collection of accurate images of the Moon for each hour have been made into the movies below each lasting about 5 minutes. Try watching full screen for the best effect. Versions of the movie are available for readers in the northern and the southern hemispheres.

I explain the Moon’s peculiar wobble and tipping motions at this blog post.

Northern hemisphere

Southern hemisphere