Posted on Thursday, March 26, 2015
By Kadri Tinn |


Myths, Symbols and Legends of Solar System Bodies by Rachel Alexander

There are several books out there that deal with the mythological background of the names for celestial objects starting with all the books on various constellation myths and ending pretty much with books like this - that explains the legendary heroes in Greco-Roman mythology after whom objects in the Solar System have been named.

In addition to the ancient Greek myths, this book has  quite a bit more to offer, as it also dips into Celtic and Scandinavian mythology, as there are objects that aren't named after characters you might find in a work by Homer, some other interesting stories from all across the world can be found as well.

The book is interesting in its extent and the way it looks at the symbols - for example the representation of the Sun in different cultures, but also in the extent it goes to in looking at the names given to surface features on various planets and on the Moon - if you've ever wondered after whom or what craters or volcanoes are named on Venus or Mars, this book gives a good overview.

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Posted on Sunday, March 15, 2015
By Kadri Tinn |

Sun in H-Alpha on March 14th, 2015

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Posted on Wednesday, March 11, 2015
By Kadri Tinn |
Have you already made your observation plans for the solar eclipse on March 20th?
Here's a map of where you can see it.
Eclipse predictions by Fred Espenak, NASA's GSFC
In my location there are several observation events that will be taking place to observe the partial eclipse, where the Moon will cover up to 73% of the solar disks surface area. Hopefull all will go well, and the weather will cooperate. The solar eclipse will start at 9 GMT (11 EST) and finishes by 11.
If you take any images of the eclipsed sun, share them with us!

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Posted on Friday, March 06, 2015
By Kadri Tinn |
NASA's Dawn mission will be arriving at Ceres today, March 6 th, 2015

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Posted on Thursday, February 26, 2015
By Kadri Tinn |
The Sun appears rather quiet with no large sunspots.
On the picture below the small sunspots aren't easily seen- However you can see prominences on the edge of the solar disk and dark filaments and bright plages on the disk of the Sun.

This photo was taken in Tartu, Estonia with a Coronado SolarMax II telescope and Canon EOS 500D camera. ISO 200, exposure 1/50 s.
The Sun in H-Alpha on February 26th, 2015. Image credit: Kadri Tinn

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Posted on Tuesday, February 24, 2015
By Kadri Tinn |
The Sun photographed in H- alpha on February 17th, 2015 in Tartu, Estonia with a Coronado SolarMax II telescope and Canon EOS 500D camera. Exposure 1/60 s, ISO 200.
The Sun in H -Alpha on February 17, 2015. Credit: Kadri Tinn

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Posted on Tuesday, February 24, 2015
By Kadri Tinn |
Mechanics: An Intensive Course by Masud Chaichian, Ioan Merches, Anca Turneau

In a general physics course, mechanics is something that seems rather basic as it is one of the fundamental courses you can take to build your physics education on.
As such some basic Newtonian mechanics can be found in the first part of the book and after that the textbook covers what is known as analytical mechanics - a highly mathematical area of study that benefits from spending a lot of time working out problems and concentrating on the mathematical methods and physical applications. So the reader finds both Lagrangian and Hamiltonian formalism and the principle of least action.

The book is well structured and follows the logical way of studying mechanics with a large amount of problems that the student can solve and if you have lost yourself in the physics because of forgetting an important part of mathematics - some of the relevant topics can be found in the appendices and might help you get back on track.

It's good study material and well equipped for those who want to find out more about the applications of a analytical mechanics in addition to the general idea of it.

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