All about Universe

An astronomical object consisting of a luminous spheroid of plasma held together by its own gravity is known as a Star. The nearest star to the Earth is Sun. Many other stars are visible to the naked eye at night but due to there immense distance from Earth they appear as fixed points of light in the sky.   Many of the brightest stars have proper names and many of the prominent stars are grouped into   constellations  and asterisms. There are approximately 10^22 to 10^24 stars in the observable Universe, but most are invisible to the naked eye from Earth, including all individual stars outside our Milky Way Galaxy. Learn about  LIFE CYCLE OF A STAR  here. Now we will be going to talk about different star systems present in the observable Universe and is known to us. There are three major star systems which are Single Star System, Binary Star system and Trinary Star System. 1. SINGLE STAR SYSTEM A star system or a Stellar system is a small number of stars that or...

Outlined below some of the well known Constellations of the Universe: 1. LYRA Lyra is a small constellation. It is one of the 48 constellations discovered by the 2nd century astronomer, Ptolemy and is also one of the 88 modern constellations recognized by the International Astronomical Union. Represented on star maps, Lyra was often shown as a vulture or an eagle carrying a Lyre, and hence is sometimes referred to as Vultur Cadens or Aquila Cadens ("Falling Vulture" or "Falling Eagle" respectively).  Vega is the brightest star of the constellation Lyra and also one of the brightest star in the night sky. It forms the corner of the framed Summer Triangle Asterism. The other stars of the constellation are Alafadar, Sheliak, Sulafat, Xihe, and Chason.  Ring Nebula, also known as NGC 6720 and M57 is the best known planetary Nebula and the second to be discovered 2000 light years away from Earth is also hosted by Lyra. Lyra also contains Dumbbell Nebula, another planetar...

Today we will discuss about some more well known Constellations in the Universe. Details are as follows: 1. GEMINI One of the Constellation of the Zodiac, Gemini is located in the Northern celestial hemisphere. Described by Ptolemy, 2nd Century AD astronomer, it was one of the 48 Constellations and it remains one of the 88 modern constellations today. Its name is Latin for "twins", and it is asso ciated with the twins "Castor" and "Pollux" in Greek mythology. Its symbol is ♊. Gemini lies between Taurus to the west and Cancer to the east, with Auriga and Lynx to the north, Monoceros and Canis Minor to the south and Orion to the south-west. Visible the entire night in December and January, Gemini is prominent in the winter skies of the Northern Hemisphere. The easiest way to locate the constellation is to find its two brightest stars Castor and pollux eastward from the familiar V-shaped asterism of Taurus and the three stars of Orion's Belt (Alnitak, Aln...

A Constellation is an area on a Celestial Sphere in which a group of visible stars forms an outline or pattern, typically representing an animal, mythological person or creature, or an inanimate object. The first constellations are thought to have originated in prehistoric times. They were used to tell stories about people's beliefs, experiences, creations and mythology.  Outlined below are details of some of the famous known constellations:– 1. URSA MAJOR Ursa Major, also known as the Great Bear is a constellation in the Northern Sky, whose associated mythology likely dates back into prehistory. Today it is the third largest of the 88 modern constellations. Ursa Major is primarily known from the pattern of its seven major stars, which has been dubbed the "Big Dipper", "The Wagon", "Charles' Wain" ot " The Plough", among other things. The Stellar arrangement of the Big Dipper, in particular, resembles the form of the " Little Dipper....

Hello guys, today I am going to tell you about some unheard Science and Facts about the Universe which are knowledgeable and interesting. 1. Which was the first Atom of the Universe? As we all know that Universe was formed nearly 13,700,000,000 years ago owing to the "Big Bang" explosion. That time, Universe was so hot that formation of any atom was not possible. Nearly after 3,80,000 years when temparature began decreasing then the nuclei present in the Universe started capturing the electrons and the formation of atoms began. Till now we are not sure that which atom formed first but HELIUM-4 or HELIUM-3 or an isotope of hydrogen, DEUTERIUM, these three are the oldest known atoms of the Universe. If we talk about the first formed molecule, it was surely HELIUM HYDRIDE which was formed with the combination of hydrogen and helium.  2. Revolution of Our Solar System. Do you know that our Solar System is 450,000,000 years old and our Milky Way is 13,500,000,000 years old and as ...

Launch Vehicle is a good illustration of Newton's third law of motion, "For every action, there is equal and opposite reaction. " In case of a launch vehicle the "action" is the flow out the rear of the vehicle of exhaust gases produced by the combustion of the vehicle's fuel in its rocket engine, and the "reaction" is the pressure, called thrust, applied to the internal structure of the launch vehicle that pushes it in the direction opposite to the exhaust flow. Unlike jet engines, which operate on the same action-reaction principle but obtain the oxygen needed for burning their fuel from the atmosphere, rockets carry with them their own oxidizing agent. In that way they can operate in the vacuum beyond the atmosphere.  The primary goal of launch vehicle designers is to maximize the vehicle's weight-lifting capability while at the same time providing and adequate level of reliability at an acceptable cost. Achieving a balance among these three...