SPACE exploration

Dark matter and Energy Well we all know that our universe was born 14 billion years ago , after the big bang explosion...According to the great physicist stephen hawking universe have began from a singularity...And there were two main hypotheses about the beginning of our universe...  which were the big bang theory and the steady state theory.. I will explain about these both hypotheses in my upcoming articles....Now lets focus on our main topic.... What is dark matter ? The observable universe has a radius around 47 billion light years...Due to the expansion of the universe this might get minimized in the next billion years...The average temperature of the universe was 2.7K ..Our universe was made of three major substances....And they were Visible matter , Dark matter and Dark energy.... Astronomers believe that 69% of the universe was about dark energy and 26% was dark matter....Only 5% represents what we observe in the universe as normal matters....Black holes , stellars , comet...

  Members of the   STELLAR fam .... Night sky observation was one of the most fascinating events for a space lover...we see plenty of stellars in our night sky while observing from our naked eye...But if use a telescope for our observation we can see more enchanting events...        Modern astronomy and astrophysics history goes around 400-500 years and during that time scientist have been discovered over millions of stars through telescopes....but unfortunately we can only visible around 4000 stars from our naked eye due to light pollution... So because of this vast discoveries of stars scientist wanted to categories them into groups by using its characteristics....So as a result of that "hertzsprung - russel diagram" was created by the scientists named  Ejnar hertzsprung and henry russel in the 20th century....  The H-R diagram ( hertzsprung - russel diagram ) provides valuable info about stellar evolution....By studying the position of a star i...

LIFE CYCLE OF A sTar........   One thing we personally believe was "everything that was existing  are temporary "   So the above statement was valid for everything including stars as well....as humans we once form as a toddler then eventually we getting close to our grave when time flows...in the modern era the whole scenario might get about 80 years....so the same cycle happens for stars  as well..but the only difference between those two scenarios are the timelines for its destination... stars ended up their lives after shinning for more than 10 billion years in the interstellar.... Birth of a star......        ( eagle nebula captured by jwst ) Stars getting formed by a dust cloud named as the nebula...their were plenty of nebulas you can observe in the milky way....these nebulas were fulfilled with dust and basic elements such as hydrogen , helium , carbon , silicon.... The stars that already exist spreads solar radiation  and light a...

Gravitational lensing  What is gravitational lensing ? According to the special theory of relativity objects with higher mass bends the space time ...if you don't have a clear idea about space time  i will clarify about that concept in my upcoming articles... Well light contains particles named as photons...photon particles have a minor mass ...so when a light ray moving through the space time and meets a bended space time curve..eventually the light ray bends with it as well...this scenario named as the gravitational lensing.... this is the most simplified  clarification for gravitational lensing.... So why gravitational lensing was important for space exploration ? Well scientist use the gravitational lensing method to explore deep space....the above picture contains galaxies which was even 13 billion light years away from earth.... The benefit of gravitational lensing was...with the affect of gravitational lensing the brightness of a light ray will get increased....so...