Astronomy

                   SPIRAL GALAXY Spiral Galaxies are looking like a round cycle. Spiral galaxies get their name from the shape of their discs. In this type of GALAXIES basically have a place named "galactic bulge" it is the central bright region of the galaxy, which Brightness is very high. In Spiral galaxies, near Spiral arm, a region presents, named HALO.                                                                                                       Spiral - galaxy originally described by Edwin Hubble . Most Spiral galaxies consist of a flat, rotating disc containing Stars, dust and Nebulae  and it's center is known as Bulge . Sub Categories Of Spiral Galaxy:-  Spiral Galaxies are divided into sub categories:-    A . S0  Galaxies : It is basically the mixture of Spiral and Elliptical galaxy. It works like a bridge between the two galaxies classification. B. Sa Galaxies : It is a thin and tight arm of normal spiral galaxies. NGC - 1302 an

                              VENUS Venus is  secon d planet  from the Su n in our Solar - System and Nearest planet to the Earth. Brightness : Venus is Brightest planet in our Solar - System . and second  brightest natural object in the night sky after the Moon.It can be seen even in daylight, if you know where to look. Venus is so bright because it is covered by clouds that reflect much of the incoming sunlight .     Surface : Venus has phases like the moon, because the orbit of  Venus is between the earth and the sun . Venus is covered by water vapor and sulfuric acid and the surface cannot be seen with an ordinary telescope. Evening - Morning STAR :   When Venus is west of the Sun, it rises before the Sun in the morning and is known as Morning - Star. And when Venus is east of the sun, it shines in the evening just after the Sun and called the Evening Star. Orbit of Venus : Venus round the Sun in 225 days, Distance from the Sun :

                             OUR GALAXY   Galaxy is one of the mysterious and interesting thing of the Universe, which Scientists have not yet been able to know. A Galaxy is a large collection of dust, gas and STARS. The Galaxy is the gravitationally bounded system.Scientists classified the GALAXY according to it's property.                                                  The 'MILKY WAY' is our Galaxy. Our Solar - System is a part of Our Galaxy and Earth, where we live is one of the planet of Our Solar - System. TYPES OF GALAXY: There are three major types of Galaxy: 1. Spiral galaxy 2. Elliptical Galaxy. 3. Irregular galaxy 1.SPIRAL GALAXY :-Spiral galaxy is one kind of GALAXY. These are the most common type in the Universe. Our Galaxy MILKY- WAY is a Spiral - galaxy . Spiral galaxies are divided in to subcategories : . .So Galaxy. ..Sa Galaxy. ..Sb Galaxy. ..Sc Galaxy. 2. ELLIPTICAL GALAXY :-  Hubble Telescope classified the Galaxies ac