In case you didn’t notice, the predicted end of the world on 19 Nov 2017 did not happen. I don’t expect it to happen any time soon. I don’t normally make bold predictions about anything. There was one exception in 1974 in the Nixon administration. I successfully predicted he would resign. I think I was lucky.
If you are a believer in the end times prophesies, you may scoff at my prediction. That’s ok. I will give 10 reasons why I think I’m right. Mine are based on science. Join me below the glowing solar firestorm of death and destruction for the reasons we can feel the end is NOT near.
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My bags are packed. I am ready to join 2.4 million other passengers as we begin our journey to Mars in May 2018 aboard the INSIGHT spacecraft. The trip will take about 7 months. It is a one-way journey.
Click to read the fine print. My flight miles award will be enormous.
INSIGHT is the acronym for Interior Exploration using Seismic Investigations, Geodesy and Heat Transport. NASA loves acronyms. Previous Mars missions have studied intensively the surface and atmosphere of the planet. This spacecraft is the first designed to study the interior in hopes of finding clues to the formation of the rocky inner planets. The spacecraft will use seismology, heat flow equipment, and very precise tracking to probe the planet below ground.
The opportunity to sign up for the mission ended on November 1. There were over 2.4 million people who did so. In this link are examples which include children from an elementary school, mission and science managers, as well as famous people like William Shatner.
Clinton Prairie Elementary School | Frankfort, Indiana
Our names will be placed on silicon microchips and attached to the spacecraft. I think it is cool that so many names will be planted on another planet. Perhaps future space travelers will find them. Would you be willing to make the actual trip knowing it was one-way?
The sun’s output in the visible spectrum peaks around yellow. Our eyes are most sensitive to that part of the visible spectrum. The sun also radiates in a broad range of other wavelengths invisible to our eyes. Each comes from dynamics taking place on the surface and in the atmosphere of the sun.
I’ve written about NASA’s Solar Dynamics Observatory (SDO) earlier in a previous post. SDO observes and images the sun several times a minute at ten different wavelengths to give a more complete picture of the activity at and near the surface. A description of those wavelengths is available here. I used the images from the SDO site to render this image of the sun at those ten wavelengths. The yellow center represents the sun’s surface. Each ring of color is at a higher altitude and temperature in the atmosphere of the sun.
Original images used from: NASA/GSFC/Solar Dynamics Observatory
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The astronomy community is active with posts and anticipation of the end of the Cassini Mission to Saturn early in the morning of 15 Sep 2017. This post serves as a brief reminder that you can witness the ending moments live by going online or via the NASA channel on cable. Set your calendar or clock.
Time to show up for the broadcast is 7 am Eastern Time, 6 CT, 5 MT, or 4 PT. I will leave the time calculation to others who live across the oceans.
Online sources include YouTube, NASA-TV, UStream, and Facebook. The table in the link includes links to each of those. You get to choose.
Consult your cable provider to see if they provide the NASA-TV channel.
For a huge number of links to current and past information about the Cassini Mission, please go to the Media Kit provided for reporters by NASA-JPL. It is loaded with terrific sources and deserves to be bookmarked for future reference beyond the end of this mission.
The Cassini-Huygens mission has delivered an enormous amount of new scientific findings about Saturn, its rings, and the surrounding many moons. Design work on the mission started in the 1980s as a joint effort by NASA, the European Space Agency ESA, and the Italian space agency Agenzia Spaziale Italiana ASI. Launch was on 15 October 1997. It reached Saturn orbit 1 July 2004 after flybys of Venus, Earth, and Jupiter to adjust the orbit speed and direction via gravity assist. My previous posts about many of the findings by Cassini and Huygens are listed here.
On 15 September 2017, the Cassini spacecraft ends the mission by plunging into the atmosphere of Saturn. It will not be left in orbit for fear of collision with a Saturnian moon and possible contamination of the moon. Future missions to the Saturn system need to be free of any potential contaminants from Earth.
Some scientists and mission specialists have worked on Cassini for their entire careers. This video highlights a few of them and how they feel about the legacy of the mission. I congratulate them all for a job well done. I will be watching NASA-TV at 6 am CDT September 15 to see the final moments of the plunge into Saturn. I hope you will be watching, too.
Iridium is a global network of communications satellites. The system was originally a product of Motorola. Iridium’s 66 satellites provide wireless mobile communications as they move in polar orbits at altitude of 485 mi (781 km). They are able to provide global coverage from pole to pole.
This brief video illustrates the ability of the constellation of satellites to receive a ground signal, pass it to other satellites, then deliver it to the ground in another part of the world.
The original Iridium satellites carry three highly reflective antennae as shown in the image below. Because of their mirror-like surfaces being positioned much of the time in intense bright sunlight, they sometimes reflect a bright spot of light to the ground. The ground track of the reflections is known precisely. If you happen to see it in the sky above, it grows in brightness over a few seconds and can be many times more intense that Venus and then it fades away. They are most easily seen just after sunset and before sunrise. They can also be seen in bright daylight if you know where to look.
Wikimedia | Cliff
I received an email earlier in the week telling me such a reflection, or Iridium flare, was to pass right over my house going south. In fact, another Iridium satellite in nearly the same orbit was to also flare me only 24 seconds after the first. The sky was clear the night of 13 May as I set up for a time exposure photograph.
About 45 seconds before 9:22:14 pm, I started the exposure using NightCap Pro on my iPad 2. The flare maximum occurred as predicted right on time. Coming right behind it was the next one. It passed and peaked at 9:22:38 pm. After 90 seconds I ended the time exposure.
Taken with NightCap Pro | ISS mode | 89.05 sec
How does one know when and where to look? I subscribe to a service called CalSky. It emails me when significant events like this are to occur. It offers many options and services but is not the easiest to use. There are others which are simpler. The best in my opinion for the general user is Heavens Above. In these services, you need to input your location. Heavens Above makes it easy to do by clicking on a map for your location.
Using the CalSky interface, I produced the sky chart of where the Iridium flares were going to pass. It gave this chart making it easy to know where to point my camera.
Saturn’s north pole features a hexagon shaped pattern in the clouds driven by fast winds that wrap the planet. The hexagon is about as wide as 2 Earths. This image taken by Cassini on 2 Apr 2014 is in greyscale.
On 26 Apr 2017, Cassini passed over this same hexagon region but at a much lower altitude. This pass was the first of 22 during the coming months in the Grand Finale of the mission. It will enter the cloud tops 15 Sep 2017 to end the 20 year mission at Saturn. As Cassini made this recent close pass, it imaged the hexagon in greyscale 3 time with filters of red, green, and blue.
Using Photoshop, I combined these RGB greyscale images into one with color. The colors are not necessarily what the eye would see. They are my choices in order to enhance differences in regions and appearance. The large blue object at the bottom is like the eye of a hurricane on Earth, but much larger.
The hexagon pattern can be produced in a laboratory evidenced in this post.