🔭 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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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.
I really like my Celestron Skymaster Pro 15×70 mm binoculars. Their wide field of view, bright optics, and sharp focus enhance views of the night sky. What I don’t like is how heavy they are at 3.75 lbs (1.70 kg). They came with a tripod mount which works fine. But, I have found getting into good viewing position to look steeply up in the sky can be a challenge. The tripod legs are extended too far if I am standing which adds to it shaking. Sitting to view doesn’t work better as the tripod and my legs compete for the same space.
I wondered if there was a better and cheap solution to holding the binoculars steady and giving me flexibility for viewing. I browsed the local hardware store for inspiration and found this tool in the paint section. The tool had a swivel head with about 60˚range of motion.
In a display of extendable poles, I picked one that was a bit taller than me in its longest position. Total cost was $20.
The binoculars rest firmly on the foam pad of the paint tool with enough friction so they don’t slip. A small bungee cord might be a good idea. I can easily grip them and the pad and adjust focus if necessary. The adjustable pole gives comfortable and very stable control of height. I can tilt up-down and right-left easily to scan a portion of sky. Set up and take down is fast. Best of all, no more shaky binoculars. This is a winner for me.
The sky has been graced by four planets in recent weeks shortly after sunset. Farthest west has been Venus. Next toward the east has been Jupiter, then fainter Saturn, and brilliant Mars in the southeast. This view from Starry Nite desktop software shows their arrangement in mid-August soon after sunset.
The Moon was a new thin crescent on 11 Sep soon after sunset here photographed by Heiko Ulbricht in Germany.
Heiko Ulbricht | September 11, 2018 | @ Mt. Lerchenberg, Saxony, Germany
Each successive night after 11 Sep, the Moon appeared farther east in the evening sky as it orbited Earth. Our weather forecast predicted a series of clear days which gave me hope of capturing an image of the Moon near each of the four planets during the coming week.
Earth has been moving closer to Mars this spring as we orbit the Sun. We reach inferior conjunction, our closest to the planet, in late July 2018. Mars will appear larger in telescope views until then. No, it will not appear as large as a full moon contrary to an internet meme that has gone around for years.
Saturn is in the distant backround when viewed early in the mornings. Because Mars is closer to the Sun than Saturn, it passed by the slower moving Saturn. This short animation illustrates the passage. Watch Saturn slowly move across the frame. Also, watch for the Moon to pass by at the end of the animation. That happened on 7 April 2018.
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🔭 Updates an earlier post to include recent changes and new information.
As an amateur astronomer, I use desktop planetarium software to plan viewing sessions and keep track of the planets and Moon. There are many products available for all computer platforms and smartphones. A Google search yields links to many sources. I downloaded and use the open source Stellarium on my desktop computer. It can be customized to your location and is free. 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 some I find interesting. Each has multiple features, a unique look and feel, and different levels of detail. They can help satisfy your curiosity about astronomical events.
I have included only a few select sites and links since so many are available. I welcome reader questions or reviews about using these tools or others you find helpful.
Show me more
Two days earlier I posted some photos of Venus and Mars in the pre-dawn light. The positions of Venus and Mars were getting closer each morning. October 5th was to be the day they would be closest at 1/4˚ apart. For comparison, the Moon’s diameter is only 1/2˚ wide.
Our weather forecast said it would be raining on the morning of the 5th. I assumed that previous post was going to be all I would get to share about their conjunction. Today I looked outside before 6 am and was thrilled to see a clear sky. I got the camera and tripod to capture the unexpected scene.
First is a screen capture from my planetarium software showing the planets on the 3rd and the 5th of October.
Next is my photograph of Venus and Mars at 6 am on the 3rd of October. It is adjusted to be the same scale as the first image.
Finally, my photograph of the two at 6 am on the 5th of October. It is adjusted to be the same scale as the first image. They were about half the width of a full moon apart. Mars was hard to see without the aid of binoculars. By 6:30 am, the sky was too bright to see Mars. Venus remained bright and easily seen. In fact, in clear skies, Venus is not hard to see in the daytime if you know where to look.