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Space

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 Hii, welcome to  my post. Today we are going to know about Space ,  So let's start :   • Space is the boundless three dimensional extent in which objects and events have relative postion and direction.  • Space is continuous area or expansion which is free , available and unoccupied.  • It is a vacuum devoided of matter where sound cannot travel.  • It is the zone above and around our planets where there is no air to breathe  or light to scatter. • Space is one of the few fundamental quantities in physics,  meaning that it cannot be defined via other quantities because nothing more fundamental  it known at present. On the other hand , it can be related to other fundamental quantities.  • Our solar system is part of space. Like our solar  system, billions of other solar system  are present  in Space. • Billions of stars , galaxies, planet etc are part of space. • Billions of commets , asteroid,  bla...
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Solar system

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 Hii , welcome to my post. Today we are going to know about solar system. So let's start. • The Solar System is the gravitationally bound system of the Sun and the objects that orbit it. • It formed 4.6 billion years ago from the   gravitational collapse of a giant interstellar           molecular cloud.  •Formation of solar system is described by bing bang theory . • Solar system consist of 8 planets . Before 2006 there were 9 planets in the solar system, but in 2006 the ninth planet "Pluto" was removed from our solar system.   • The order of the planets in the solar system,               starting nearest the sun and working outward is       the following: Mercury , Venus , Earth Mars ,                  Jupiter , Saturn , Uranus , Neptune and then the           possible Planet Nine Plu...
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Big bang theory

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At the beginning of your trip through space, you might recognize some of the sights. The Earth is part of a group of planets that all orbit the Sun – with some orbiting asteroids and comets mixed in, too. A diagram of the solar system, showing the sun and its orbiting planets. A familiar neighborhood. Mark Garlick/Science Photo Library via Getty Images You might know that the Sun is actually just an average star, and looks bigger and brighter than the other stars only because it is closer. To get to the next n hii earest star, you would have to travel through trillions of miles of space. If you could ride on the fastest space probe NASA has ever made, it would still take you thousands of years to get there. If stars are like houses, then galaxies are like cities full of houses. Scientists estimate there are 100 billion stars in Earth’s galaxy. If you could zoom out, way beyond Earth’s galaxy, those 100 billion stars would blend together – the way lights of city buildin...
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Mercury

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Hii , welcome to my post . Today we are going to know about Mercruy (planet). So let's start : Definition : • Mercury is the smallest planet in the  Solar system   and the closest to the Sun . • Its orbit around the Sun takes 87.97 Earth days, the   shortest of all the Sun's planets. • It is named after the Roman god Mercurius (Mercury),   god of commerce, messenger of the gods, and   mediator between gods and mortals, corresponding   to the Greek god Hermes. • Like Venus , Mercury orbits the Sun within Earth 's     orbit as an inferior planet. • Its apparent distance from the Sun as viewed from   Earth never exceeds 28°.  • This proximity to the Sun means the planet can only    be seen near the western horizon after sunset. Facts :  • Mercury rotates in solar system in unique way.  • Mercury is the planet that orbits the closest to the    Sun.  • Mercury is the smallest pla...
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Sun

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Hii, welcome to my post . Today we are going to know about sun. So let's get started.   Definition: • The Sun is a star at the center of the Solar System,     about which planets of the solar system revolve. • It is a nearly perfect ball of hot plasma. • The Sun's radius is about 695,000 kilometers . • Sun is 109 times bigger than the Earth. • Its mass is about 330000 times that of Earth. • The Sun comprises  about 99.86% of the total mass. Facts: • The sun is a yellow dwarf star in the center of the   solar system. • It is the largest, brightest and most massive object in   the system. • The sun formed around 4.5 billion years ago. • The heat and light from this nuclear reaction enabled    life on Earth to evolve and prosper. Quick facts :   (i) Equatorial diameter ----- 1.39 M KM. (ii) Mass ---- 1.99 x 10 ³⁰ KG . (iii) Gal. Centre distance ---- 26038 light year . (iv) Roatationa...
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