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Perhaps, it's a little weird for me to begin an article with a glimpse to a romantic movie, but I can't think of a cooler way to start today's topic. When I came up with the idea to write about "Camera Obscura", the first thought that came to my mind was a movie from 1997, called "Addicted to Love". Of all the movies in this genre only a few are on the top of my mind and this one, directed by Griffin Dunne with Matthew Broderick and Meg Ryan in lead roles is definitely the best one I remember. In short, Sam, an astronomer who, in an attempt to win back his girlfriend, turns his astronomical tools into specific spy equipment and by using his dark-chambered pinhole camera manages to observe what is happening in the building across the street in the real time. What he used to achieve this is a principle behind Camera Obscura - a method to project the light through a small hole and create an image on the opposite wall inside a dark room, tent, or box. Someth...

The knowledge and manufacture of lenses were known since the time of the old Greeks (the word optics came from the Greek word ὀπτικά, which means appearance) and later in the old ages with Egyptian scholar Alhazen who made important contributions to the study of optics in general. In Europe, the lenses arrived around 13th century and immediately triggered the invention of the first eyeglasses. However, one important discovery had to wait three centuries later in order to set off a wave of new discoveries in the field of astronomy. The invention was made by Hans Lippershey, the spectacle maker from the Dutch city of Middelburg in Netherlands, who in October 1608 tried to apply for a patent for a tool he described as an aid capable of "seeing faraway things as though nearby" . It consisted of a convex and concave lenses in a tube capable of magnifying objects three or four times. For strange reasons, the patent was rejected, but the new instrument immediately attracted attentio...

Before we jump into premature conclusion with easy answers as 'nothing at all' or 'at least they are both orbiting the Sun' perhaps we could do some quick research for just in case... With equatorial radius of Jupiter almost thirty times bigger than the same property on Mercury, obvious composition difference between one gas giant and small rocky planet and all the other major difference in mass, density, temperature, orbital inclination, orbit period and with almost everything we could compare the two, it is very hard to find the slightest similarity. For more videos please visit ZVIKTOR22 YouTube Channel .

Before we jump into premature conclusion with easy answers as 'nothing at all' or 'at least they are both orbiting the Sun' perhaps we could do some quick research for just in case... With equatorial radius of Jupiter almost thirty times bigger than the same property on Mercury, obvious composition difference between one gas giant and small rocky planet and all the other major difference in mass, density, temperature, orbital inclination, orbit period and with almost everything we could compare the two, it is very hard to find the slightest similarity. Not to say that Jupiter in its arsenal is in possession of moons equal or even bigger in size than the smallest planet of our Solar system. However within past couple of seasons, what they had in common was the fact that they were under the spotlight of all of us who from time to time enjoy gazing the sky with naked eyes or through modest telescopes with strong feeling of being the witnesses of our own Solar system ...

Until recently I had a toy-model of Russian space station Mir hanged in our living room settled nicely between two more common house decorations. It was small in size, no bigger than five cubic inches with two teeny tiny Soyuz spacecrafts docked at their designated locks and numerous solar panels all over the place. The plastic toy is long gone now but still from time to time it raises some nice memories, especially those moments when couple of our guests after close inspection from all directions asked questions like "What the heck is this?" or "Is this art?". Not many of them recognized the most challenging technological endeavor of the last two decades of previous century at first glance. On March 23, 2001, all the biggest Mir's fragments after surviving hellish re-entry through the atmosphere hit the Pacific ocean and ended 15 years of various scientific experiments performed by 28 long duration multinational crews with total of 104 people from 12 ...

Moon travels around the Earth in elliptical orbit and logically there are two points in its path where it is closest and farthest from us. Today it was in "perigee-syzygy" of the Earth-Moon-Sun system or simply called "supermoon". Coincidentally, it happens that today it has the power to fully block the sunlight in northern Europe and made the biggest shadow one can do on Earth. In Serbia it only made partial eclipse covering somewhat less than 50% of the Solar disk. These are 12 photos I took in intervals of approximately 10 minutes from eclipse start at 9:40 until it went away around 11:58. The biggest shade was at 10:48. We were pretty lucky today since the nature gave us clear sky with just one stubborn cloud that covered the Sun-Moon kiss around 11AM. Above image is the composition of those 12 photos which I took through our Sky-Watcher telescope with solar filter. I still don't have proper camera or adapter for taking astronomical photos so I used ...

Did you know that if you were standing on the near side of the Moon, and for your mass of 80kg and weight of 785N on Earth, due to Moon's lower gravity, you would not feel being heavier than 13kg (130N)? You knew? Ok, did you know that Earth's and Moon's gravities combined gave you different weight on near and far side of the Moon? Slightly yes, but true. Earth and Moon are relatively small celestial bodies but this difference goes even higher if you move from the Moon to the Io or Europe for example as they are also tidally locked by Jupiter just like our Moon is locked by Earth. This would most definitely not help mountains on Avatar's Pandora to float but still, within right conditions and with presence of large mass(es) nearby, considering appropriate composition of the ground I am sure there are solar systems out there with strange conditions to live with, to say the least. "If I have seen further it is by standing on the shoulders of giants” - Isaac Ne...

Do you have that strange feeling when you are about to visit new city abroad and little afraid of what you would stumble to when it come to simple things? Like how to use metro line or how to buy a bus ticket or how to identify your next destination? Or how to book your flight back to your home? Or how to handle a simple dilemma of should you exchange the money to the local currency or is it wise to put your card in every ATM or any other 'slot' machine on your way? Hello™ at Microsoft Campus Days, 2014 Ericsson, a Swedish multinational provider of communications technology and services, has the answer for you. And me too. Last week, I took my entire family to the trip to Copenhagen for both, business and pleasure hours in the Danish capital. During my previous visits I didn't have much time for tourism and any off work activity for that matter. So I took a little research this time and Ericsson's " Networked Society City Index " helped a lot. Within t...

I remember every little detail from that weekend trip. From the very first moment when we stepped into the bus that took us to the mountain base, throughout the rest of the first day when we climbed down into small cave with narrow hallways toward the small chamber at it's end. I vividly remember glorious, endless and hard-to-find second cave we stepped in the very next day, followed by overwhelming feeling and little fear when we passed through cave chambers, cutting the darkness with handy tools and small flashlights. I will always hate myself, for not having a camera to capture surrounding scenery when we traveled by train later that afternoon, who looked like it came right out of 19th century with wooden benches rolling the railways slower than Usain Bolt. All those rock formations and abandoned train stations were slowly losing their battles with nature and were looking exactly like a background from Sergio Leone's spaghetti western movies. Viktor at Rundetårn observ...