People Going on Mars – a Tourist Guide

People Going on Mars – a Tourist Guide

  Let’s for a moment imagine that space travel has become a daily round. Which planet would you like to visit first? Hot Mercury, which is closest to the Sun? Charming Venus or the red Mars – one that is most familiar? So let not take big risks and choose a Planet on which we will feel most “comfortable”.  Mars – four seasons, 24-hour day, atmospheric clouds and mists, tolerable temperatures – this must surely be the first stop in the cosmic journey. Before going to the Red Planet, however, nice to know a few important things. To get there,...
How Big is Sun compared to Earth?

How Big is Sun compared to Earth?

  The Sun! Our everything. The source of Life and at the same time an ordinary Star in an ordinary Galaxy. But how big is actually? The most easy way to understand the size of the Sun is to compare it  to something we know. Our home Planet – The Earth will do a wonderful job. But first let’s look up a bit of digits. The Sun is a star at the center of the solar system. It represents almost a perfect sphere made up of hot plasma and magnetic fields. Its diameter is about 1 392 000 km, nearly...
How Far Actually We Can Go into Space?

How Far Actually We Can Go into Space?

  When we speak for studying of the vast space, how far can humanity go into Space? – asks Science Alert? Is there a limit to our ability for going beyond Earth? As explained by this video channel Kurzgesagt – In a Nutshell, our Planet is located in one corner of the Milky Way – a ordinary galaxy full of stars, planets and a huge black hole in its center. The nearest neighboring galaxy is Andromeda and with it another 50 other galaxies, the Milky Way belongs to a local group with a diameter of about 10 million light years. Knowing...
What is Gravity?

What is Gravity?

We all know what is Gravity – it is what keeps us down to Earth. It is the thing that makes apple to fall next to the tree. But what is the definition of Gravity in physics?  It’s one of the fundamental interactions in the Universe. Fundamental interactions in physics are four completely different in nature interactions between elementary particles and bodies that they build. Many efforts in modern physics are focused at finding a common unified theory that would unite all interactions. So far, such a theory is not found. Here they are: Gravitational interaction Electromagnetic interaction Strong nuclear...
Speed Of Light

Speed Of Light

      Perhaps all you have heard at least once the expression “Speed of Light”. If you are from those who know that this is something very fast but  do not know how much actually, I will say that it’s about 300000 km/sec or  670,616,629 mph (miles per hour) and that is the speed of the photon – the only particle with no mass, and will add that there is nothing faster than it. In fact, because we see thanks to photons that pass through our eyes,  if their speed was much more slower we would see everything around behindhand. It sounds...
We Are All Made of Stardust

We Are All Made of Stardust

  The story of the Universe began 13.7 billion years ago and now there are more than 100 billion galaxies with a trillions of stars. If it’s hard to imagine how many stars is this let me use a example to make this easier. Imagine that you are on the beach and scooped up a handful of sand. Can you guess how much grit you are holding at this point? Yes, the number is definitely big! Now imagine the count of all the grains of sand on Earth- in every beach, every riverbed, each marine or ocean bottom. In the...