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An Einstein ring is a distorted image of a very distant galaxy, which is termed “the source”. The distortion is produced by the bending of the light rays from the source due to a massive galaxy, termed “the lens”, lying between it and the observer. The strong gravitational field produced by the lens galaxy distorts the structure of space-time in its neighborhood, and this does not only attract objects which have a mass, but also bends the paths of light. When the two galaxies are exactly aligned, the image of the more distant galaxy is converted into an almost perfect circle which surrounds the lens galaxy. The irregularities in the circle are due to asymmetries in the source galaxy. Read more....

Astronomers use UVIT to discover a large number of hot, ultraviolet bright stars in the Milky Way. UVIT is an ultraviolet imaging telescope. It is placed in the Astrosat satellite. Astrosat is India's first multi-wavelength space satellite. Highlights: Astronomers have successfully distinguished ultraviolet bright star clusters from relatively cold red giant stars and other main-sequence stars. Thirty-four ultraviolet bright stars were discovered using UVIT. From these images, the research team also derived the properties of the stars, such as brightness, temperature, and radius. The derived properties of the stars are placed in the Herzpron-Russell diagram. The graph shows the relationship between the absolute size and brightness of stars and their effective temperature (or star classification). This figure was first created in 1910 by Ejnar Hertzsprung and Henry Norris Russell. Ultraviolet bright stars.... Read more....

When we read this topic, it would look like a bunch of words that seem to have no direct connection have ended up in one sentence by accident. But this is no accident at all. This scientific discovery was in fact made last year December by The Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU). This was one of their project where they studied black holes that could have made the early universe, much more before stars and galaxies we know today were born. Primordial black holes (PBHs) may very well account for all or at least a part of the dark matter that is responsible for some of the observed gravitational waves signals and even may initiate supermassive black holes found in the center of our galaxy and other galaxies. They could also play a role in the.... Read more....

In many fields, scientists use different technics to analyze different types of samples. Most of them can visit and collect samples and analyze them in labs.  But astronomers are not that lucky. They have to observe and analyze astronomical objects from far away.

How do we know that Sun is made up of 74 percent hydrogen or that its surface temperature is almost 6,000 kelvins? The atomic composition of distant stars and planets? Have you ever wondered how we know all these details? All these questions are answered by a technique called spectroscopy!

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හදුනා නොගත් පියාසර වස්තූන් එසේත් නැතිනම් පියාඹන පීරිසි අතීතයේදි මිත්‍යාවක් සේ සැලකුවද වර්තමානය වනවිට බොහෝ රටවල ආරක්ෂක අංශ  විසින් පිළිගන්නා තත්වයට පත් වී ඇත.මෙම පියාඹන පීරිසි සම්බන්ධව දීර්ඝ ඉතිහාසයක් ඇත.අතීතයේදි මේ සම්බන්ධව පිළීනොගැනීමට විශේෂම හේතුව නම් මෙම සිදුවීම් සමහරක් ඉතා සංකීර්ණ වීමත් සාමාන්‍ය විද්‍යාත්මක තර්කනයෙන් පැහැදිලි කිරීමට නොහැකිවීමත්‍ ය. එබැවින් බොහොමයකට ආගමික අර්ථකතනයක් දී බැහැර කිරීමක් දක්නට ලැබෙයි.කෙසේවෙතත් වසර සිය ගණනකට පෙර සිදු වූ විවිධ UFO දර්ශනය වීම්  නිරීක්ෂණය කර තිබුනේ හොඳින් පුහුනුව ලැබූ, අමුතු වස්තු ආදිය වෙන් කර ගැනීමට හොදින් ඇස් පුරුදු කල ගඟන ගාමීන්, ගුවන් යානා නියමුවන්, යුධ ගුවන් යානා නියමුවන්, රේඩාර් වැනි පද්ධති ක්‍රියාකරුවන් වැනි පුද්ගලයන් විසිනි.  තාරකා හා භෞතික විද්‍යාඥයින්, අනෙකුත් ක්ෂේත්‍ර වල විද්‍යාඥයින් මේ අතර වෙයි. ඒ වගේම... Read more...

Black holes are among the most fascinating and mysterious objects in our universe. A black hole is a   region where the force of gravity is so massive that not even light; the fastest knowing entity can’t escape. It is a place where space, time and the laws of physics no longer apply.

A black hole is not truly a hole, it’s a place in space containing a vast amount of mass packed very tightly together. To have an idea about the size of this celestial object, think of a star ten times more massive than the Sun squeezed into a sphere. Also it can draw in more mass. Due to the strong gravitational field of black holes not even light can escape from it. That makes it one of the most extreme objects in the whole.... Read more...

Watching day and night sky since childhood is one of our unremitting and soul speaking hobbies. Most of the times, we want the company of the night sky. The longer you being immersed in the night sky, the deeper your thoughts get. It is an unprecedented adventure. We will never get bored while watching the night sky.

If you are a stargazer, you already have experienced the dazzling “Great Conjunction " of planets just before Christmas, the spectacular total solar eclipse and the impressive "Blue Moon "on Halloween as well as the rare bright Comet NEOWISE in July in the closing weeks of 2020. That’s why 2020 was.... Read more...