SOLAR SYSTEM and its formation

-

SOLAR SYSTEM

Our planetary system is located in an outer spiral arm of the Milky Way galaxy. Our solar system consists of our star, the Sun, and everything bound to it by gravity — the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune, dwarf planets such as Pluto, dozens of moons and millions of asteroids, comets and meteoroids. Beyond our own solar system, we have discovered thousands of planetary systems orbiting other stars in the Milky Way. Beyond our own solar system, there are more planets than stars in night sky. So far, we have discovered thousands of planetary systems orbiting other stars in the Milky Way, with more planets being found all the time. Most of the hundreds of billions of stars in our galaxy are thought to have planets of their own, and the Milky Way is but one of perhaps 100 billion galaxies in the universe. While our planet is in some ways a mere speck in the vast cosmos, we have a lot of company out there. It seems that we live in a universe packed with planets — a web of countless stars accompanied by families of objects, perhaps some with life of their own.


Formation 

Our solar system formed about 4.5 billion years ago from a dense cloud of interstellar gas and dust. The cloud collapsed, possibly due to the shockwave of a nearby exploding star, called a supernova. When this dust cloud collapsed, it formed a solar nebula—a spinning, swirling disk of material. At the center, gravity pulled more and more material in. Eventually the pressure in the core was so great that hydrogen atoms began to combine and form helium, releasing a tremendous amount of energy. With that, our Sun was born, and it eventually amassed more than 99 percent of the available matter. Matter farther out in the disk was also clumping together. These clumps smashed into one another, forming larger and larger objects. Some of them grew big enough for their gravity to shape them into spheres, becoming planets, dwarf planets and large moons. In other cases, planets did not form: the asteroid belt is made of bits and pieces of the early solar system that could never quite come together into a planet. Other smaller leftover pieces became asteroids, comets, meteoroids, and small, irregular moons

Comments

Post a Comment

Popular posts from this blog

Physics

-
 Hii Welcome to study point Physics Physics is the study of how matter and energy interact with each other and how they affect each other over time and through space. Physics functions in an exciting dimension. What we mean by this is that things keep changing in the world of physics with every discovery. As theories progress and discoveries are made, not only the answer but the whole question changes. Due to this, many individuals define physics by what it was rather than what it is and will be. Laws of Physics By nature, laws of Physics are stated facts which have been deduced and derived based on empirical observations. Simply put, the world around us works in a certain way, and physical laws are a way of classifying that “working.” Physical laws are just conclusions drawn based on years (or however long it takes) of scientific observations< and experiments which are repeated over and over under different conditions to reach inferences which can be accepted worldwide. These a...
Read more

50 Interesting riddles

-
 Did you know ? 1. Riddle:  What has to be broken before you can use it? Answer:  An egg 2. Riddle:  I’m tall when I’m young, and I’m short when I’m old. What am I? Answer:  A candle 3. Riddle:  What month of the year has 28 days? Answer:  All of them 4. Riddle:  What is full of holes but still holds water? Answer:  A sponge 5. Riddle : What question can you never answer yes to? Answer:  Are you asleep yet? 6. Riddle:  What is always in front of you but can’t be seen? Answer:  The future 7. Riddle:  There’s a one-story house in which everything is yellow. Yellow walls, yellow doors, yellow furniture. What color are the stairs? Answer:  There aren’t any—it’s a one-story house. 8. Riddle.  What can you break, even if you never pick it up or touch it? Answer:  A promise 9. Riddle:  What goes up but never comes down? Answer:  Your age 10. Riddle:  A man who was outside in the rain without an umbre...
Read more

NASA (National Aeronautics Space Administration) wiki

-
Image
  The   National Aeronautics and Space Administration   ( NASA   / ˈ n æ s ə / ) is an   independent agency   of the   U.S. federal government   responsible for the civilian   space program , as well as   aeronautics   and   space   research. [note 1] NASA was  established in 1958 , succeeding the  National Advisory Committee for Aeronautics  (NACA). The new agency was to have a distinctly civilian orientation, encouraging peaceful applications in  space science . [7] [8] [9]  Since its establishment, most US  space exploration  efforts have been led by NASA, including the  Apollo   Moon landing  missions, the  Skylab  space station, and later the  Space Shuttle . NASA is supporting the  International Space Station  and is overseeing the development of the  Orion spacecraft , the  Space Launch System ,  Commercial Crew  vehicles,...
Read more