Posted on Friday, July 10, 2015
By Kadri Tinn |

New Eyes on the Sun by John Wilkinson

If you follow space news from day to day, you 're probably acquainted with a couple of satellites that exclusively stare at the sun. If you're looking to find out more about those more famous satellites and also about some fascinating historical missions, then "New Eyes on the Sun" is just the book you need.

In this book you will find out more about the Sun itself, it's structure and physical characteristics and how you can observe the Sun, but more importantly you will get to read about how scientists have found some of the things that we nowadays take for granted and wouldn't ever wonder about how do they know it.

Observing the Sun from space isn't anything new in this space age, but there are new satellites being sent to orbit every couple of years to find out more about some aspect of the sun.
For example you can find out more about the Solar Dynamics Observatory. That satellite has several instruments looking at the Sun in different wavelengths and it gives a lot of information about sunspots and coronal holes etc. However if you'd want to know what's coming up from the other side of the Sun in a week, you'd have to look at data from another set of satellites - STEREO, two satellites that enable us to get a full view of the Sun and it makes it possible to see how active the Sun is in general, and not just on the side that we can see from Earth. Also if you want to read about SOHO, the satellite for which the mission was extended to December 2016, you'll find a lot of information here.

You can ofcourse read about many more satellites of different countries and for different purposes.

It's very informative and the insight you get into the satellites is great - it's not too technical and at just the right length with plenty of interesting details. Also if you're just looking to find out more about our closest star, it works great for that as well.
Posted on Friday, July 10, 2015
By Kadri Tinn |

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Posted on Sunday, June 07, 2015
By VJ Karthik |
SpaceX recently strapped a GoPro to their Falcon 9 rocket and captured some beautiful footage as it fell back to Earth. Footage is played in real time.

Music: Blue Danube by Johann Strauss II

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Posted on Saturday, June 06, 2015
By Kadri Tinn |
Einstein's Relativity: The Ultimate Key to the Cosmos by Fred I. Cooperstock and Steven Tieu

"Einstein's Relativity" is a concise overview of two of the most well known (by name) theories - Special and General Relativity theories. It is very accessible as it uses as little mathematics as possible and you walk away from the book with a sound understanding of what relativity is all about and you'll know for sure, whether or not the relativity theory really says that everything is relative.

This book handles the topic at a nice fast pace without leaving out some of the most important applications and proofs for both Special and General theory with the same examples that you would stumble upon in a Relativity textbook or in a course of Special Relativity.

The usual examples include moving near light speed and what seems to happen in different reference frames and the twin paradox and why it's not really a paradox as such.

Although it gives the basic gist of relativity, the book also gives an insight into some cool ideas such as time traveling and time machines - are they possible and what does relativity theory have to say about it? You'll find out in this book.

As an introduction to Einstein's relativity this is book is very good. However as it has a very nice style and easy text, you'll be a little sad to finish it so soon, as it is less than 150 pages long. 

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Posted on Saturday, June 06, 2015
By Kadri Tinn |
Although astronauts on the ISS have spotted noctilucent clouds already some days ago, on the following photos are the first NLC I've spotted this year in Tartu, Estonia.

I first noticed them at about midnight EEST and by about 1:40 they weren't visible anymore.
They were up to about 20 degrees from the horizon and spanned about 60 degrees in the northern sky.
Credit: Kadri Tinn

Credit:Kadri Tinn

Credit: Kadri Tinn

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Posted on Saturday, June 06, 2015
By Kadri Tinn |
The Sun in Hydrogen Alpha, picture taken through Coronado SolarMax II 60 telescope through a Hyperion 8-24 zoom eyepiece at 16mm with  Canon EOS 500D camera.

Sun on June 5th, 2015. Credit: Kadri Tinn

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Posted on Friday, June 05, 2015
By Kadri Tinn |
There are three naked-eye planets visible at the moment in the night sky - Venus and Jupiter in the east and Saturn rising at about sunset.
Jupiter. Skywatcher Evostar ED100 900mm and Canon EOS 500D, 39 frames stacked. Credit: Kadri Tinn
Venus. Skywatcher Evostar ED100 900mm and Canon EOS 500D
ISO 800, 1/13 s. Credit: Kadri Tinn
Saturn. Skywatcher Evostar ED100 900mm and Canon EOS 500D. 14 frames stacked. Credit: Kadri Tinn

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