Wednesday, December 20, 2017

For as long as I can remember, including childhood, I was captivated by the constellation "The Seven Sisters."

The Pleiades, (click here) also known as the Seven Sisters, is the nearest star cluster to Earth situated between 434 and 446 light years away. The cluster is the source of the names of each of the sisters in The Seven Sisters series.

The Pleiades is positioned near the shoulder of Taurus (The Bull), the larger constellation to the right of Orion’s Belt. Each of the stars is over 100 times brighter than our sun, and the human eye, from any country on the globe, can see at least six stars, with a seventh which varies in brightness and is not always visible – the reason for this fluctuation in brightness is still unknown. Some people with exceptional eyesight claim to be able to see up to 20 stars in the cluster without the aid of a telescope.

There are thought to be as many as 1000 stars in the cluster, the core of which spans 8 light years in diameter. The cluster is dominated by ‘hot blue stars’ which have formed within the past 100million years and astronomers believe that the cluster will survive for another 250million years.


The Seven Sisters is a B Type star cluster. It is helium based and blue. It has a short lifetime as suns go. 

Sol, our sun, is a Type G star.

...Compared (click here) to hotter and brighter OBAF type stars, G type stars radiate more light towards the infrared end of the spectrum. For G-type stars, the spectral lines are characterized by the presence of many neutral and ionized metallic lines (iron, calcium II, and sodium) and weak hydrogen lines. Main-sequence G stars have surface temperatures of 5,250 to 5,950 K and around 66 to 150 percent of Sol's luminosity. G-type dwarf stars appear to have between 0.85 to 1.1 Solar-masses, which indicates in theory that these stars may spend from 15 to as few as seven billion years in the main sequence fusing core hydrogen (more from CSIRO Australia)....

The real task of those seeking a new home planet is to find one with the characteristics of Earth. Then find a path to that planet that will not burn human beings to a crisp.

The idea human beings are becoming Martians serves what purpose? The expense in developing a life support system that will last on the Martian environment while attempting to pollute Mars with an Earth climate doesn't have an end game. There is no new permanent home for Earthlings.

Mars shares the same sun as Earth. When the light goes out on Earth, the same happens on Mars. All that adventure to Mars seems silly to me. There is no advancement of the species to survive and bring it's Noah's Arch. There needs to be a real purpose to achieving space travel and not simply 'we done it.'