Explore the universe

      Neutron stars : if you want to know about how are neutron stars formed ? , how gravity affects the star ? And many more about neutron star so this post for you. Read this post from start to end.           Formation of neutron stars Neutron stars are very tiny with almost 10 to 20 kilometers  diameter and very dense material in it. They are different from normal stars. Nearest neutron star away 400 light year from us.           Neutron star formation is very interesting to understand. Here every thing Beyond our imagination. here we see terrible from of gravitational force that even atoms and also the nucleous are destroyed.          Initial state of neutron star  it is normal star ( you want to know about formation of star, visit at  https://myinterestfirst.blogspot.com/2020/06/formation-of-stars-how-are-stars-formed.html ) but its...

    Formation of star : some time we look at sky and think how are stars formed ? Why are stars formed ? And why are star shinning in sky ? How and where are heavier elements formed? . So this post for you. Start reading this post and get all your answer.          How are stars formed?        In dark night every where in sky,we see only stars and stars are visible. Whole sky shinning with stars. And we are happy to watch these shinning stars. But sometimes we asked self how are star formed?        Stars are born in nebula. Nebula are a giant clouds of dust and gas mostly hydrogen, helium and other ionized gases. Density of particles in nebula generally from 100 to 10000 particles per cm^3(in the earth atmosphere almost particle density 2.5*10^15particle per cm^3 ). So density in nebulas is too low.  And there temperature is too low like 10 to 20 kelvin and they are too cold.      ...

   What will our universe behave in its ending time?  Is age of our universe infinite ? Will it destroy ? And if it will be destroy then what will the leading cause be for destroying our universe?     We can only predict on the basis of our theories and our observations about the universe. In universe there are two things that decide end of the universe.     Between two objects in space there are  two forces  that opposite each other. First gravitational  force between them pull each other and expansion of space that work against gravitational force. As space between them expand as gravitational Force weaker between them.      So there are three possibility of this type situation. 1   If acceleration of expanding universe more than acceleration of gravitational force then space among objects always expand and universe will go from big bang to big freeze and big rip. 2.  It is possible that gravita...

      When we think about explosive object,in initial when it exploded, particle in it at high density and also high temperature than after some time when it exploded. As time goes as all matter try to apart from each other and space among them always increases with respect to time. Temperature and density go down with time and expansion rate decrease with time.        Just like this our universe continuously expand from it's birth to till now. So it is possible that in initial state, very high density and high temperature in it. Also the universe start from a dot with very high density and very very high temperature, maybe density and temperature would be infinity.  And in this dot all principal of classical mechanics are destroyed. Called singularity.        After its initial expansion, the universe cooled sufficiently to allow the formation  of subatomic particles,Later atom and as universe expand as elements came...

                    Our universe continuously expand .  galaxies  , stars  , every thing in space continuously apart form us. If our universe will  continuously  expand then we are only one in all observed universe. We shall not receive  any light from galaxies and stars.          Bt what is expanding rate of space?? Actually our universe acceleratelly expand. It's expanding rate increases with time. And also it's expanding speed more than light speed.         Now you say that nothing can travel faster than light. How is space expanding speed more than light speed ? Actually light self travel in space so we can't say about space that it's expanding rate necessarily slower than light speed.  It is possible  our space expand more more than light speed. Everything depends on accelerating  speed of expand space.         ...

             We see toward the sky in night stars and plannets are visible.but every night we observe  their places in the sky are not same.  Their places are change in every part of time so how is it possible?              Our galaxy is milky way  and our neighbor galaxy is Andromeda. Both have massive mass and they pulled each other  by massive gravitational force so by this fact distance between them decrease by time.  Bt it is not....             To understand how is it possible we try to to understand Doppler effect.         As we have known visible light consists waves in electromagnetic field.  The wavelength of light is extremely small. The different wavelength of light are what the human eyes sees as different colours.  With longest wavelength at the red end of the spectrum  and the shortest wavelength at th...

Space time shape hard to visualize. Space time is  not constant like our earth surface. It's shape depend on mass of the object.            Take a example of a trapeze artist and their safety net.you can imagine a trapeze artist falling into a net on purpose that the net is flat and looks like space but when they fall into it they distort that grid well  that's a lot like space if you have matter in space it wraps the fram work when the trapeze artist is resting in the net they are bending that space - time grid little bit if you had 2 trapeze artists there double the mass in roughly the same volume .you have a bigger distortion and that's how space -time works. Space is bending like trapeze artist rest In the net and safty net get bends. In space there are plannets , stars , blackholes , nebulas and many more. These have mass so as trapeeze's safety net, space also bend .how much space bends depend what object's mass . More object mass more bendi...

space -time       Space have 3 dimensions and time is independent from space. Everything in space is not stable all are moving with respect to time.          But we don't  say time is actually a dimensions bcoz every dimension made by negative side and positive side and also 0. For example  length is positive, negative and zero so it is dimension. On the other hand time is only positive not negative. space have 3 dimensions and time .so in combination  we say space -time. So actually  we have to study about space - time more than only space.      just imagine..            You throw a stone in pond  as stone touch water in pond as it produce ripples around where the stone touch water  with 0 radius.       As stone going on depth as larger ripples radius  so ripples radius increase with respect to time. Mean space in ripples increase with respect...

           Space(ever quite.....)        Just as there are different types of biped and rocks in the ocean,in same way there are stars , planets , meteor bodies in the space . In space , there are nothing  but some very very very low dense particals.       In space hydrogen  and helium gases in large amount  and other heavy elements (oxygen, nitrogen  etc.) are in very low amount in space.  Because  in the earlier stage of universe,  there are so  only  hydrogen and helium gases. By some process hydrogen atoms able to do fusion  reaction with very high temperature  and hydrogen atoms convert in helium atoms.           But..... It is also possible that maybe helium helium add up and trasfor  in heavy Particals so yes it is.  In the very low persent.        In space there are 74% hydrogen , 24% helium and only 2% con...

 An apple fell down from tree on newton's  head and  result all we know as gravitational Force. Two bodies separate by some distance feel gravitational force but in reality when  mass of bodies  small then thier gravitational Force so weak so we can  not feel this force among us. So gravitational force propotional to bodies mass and reciprocal squre of distance  between them. If u double the distance  Between two bodies so their force between them will be quarter of real distance force. By this force Everything is controlled in universe. Planets and astroids round the sun and moons orbit Their planet and also satelites round the earth  only by this force .           Gravitational force nature attract mass So this process always exothermic process. Gravity also play a great role in build up stars.           Gravitational force depend also their desities.if density goes high so there  force...

Outer space light :  If u want to know about what is light ? What iis relation between light and time ? What is 1light year? ,so this post for you. What is the light? When we think about light primary thought that it is a source by which we can see every -thing  as we want and also a great role in life. Everything depends on light directly Or indirectly . BUT WAIT  What is actual mean of light???? Answer is light is energy. We know our sun has a great stock of hydrogen and also we know that sun's core has a very high temperture enough to generate fusion reaction by hydrogen add up and made a helium atom . This reaction example  of exothermic reaction which produce a more energy . This energy in range of light and this energy we use ......    Light have approx 300000000 meter per second velocity and as we see it is finite.     We know no one can travel fast then light.light cover sun to earth distance ...

We live in earth (most suitable planet ever known) which is the member of the sun family. Very earlier it was say earth is center of all things and all other things round aboutearth.but as time goes we find actual picture of our solar system that sun is center and all planet round about the sun. Just think🤔 1.How did all these planets come into existence? 2.how did sun get hydrogen for fuel? 3.are star only a part of decorate sky? 4.why is life on earth and if life is here so what possibility to make human beings like us?it is possible that nature made another species instead us ? so why we? 5.where astroid belt came from? 6.is earth orbit is perfact for life? & many more questions rising when we just think ......