Astronomy

                                  SUN The Sun  is the star  at the center of the Solar - system, ' The HEART of our Solar - system'.  It is a yellow dwarf star.   The Sun gives life to the  Earth  and the Earth would have no life at all without the energy it receives from the Sun. WHAT IS THE SUN MADE OF? All stars are made out of gas and plasma. The Sun consists mostly of hydrogen and helium. It also has some carbon, oxygen, nitrogen and small amounts of other gases.                                    In the center of Sun, there is a process called Nuclear Fusion. During nuclear fusion, hydrogen atoms become helium. That means that the hydrogen is slowly being turned into helium. WHAT TYPE OF STAR IS IT? Astronauts classify stars based on the In this system, stars are...

The SOLAR SYSTEM is full of planets, moons, asteroids, comets, minor planets, and many other exciting objects. the solar system is gravitational bound of the SUN and the objects that orbit it. THE SUN is the star at the center of the Solar - system. Planets of solar System:-  There are 8 planets our Solar - system, which is divided in two categories- TERRESTRIALS    :- There are four terrestrials Mercury, Venus, Earth and mars. Planets that are similar to earth, with bodies largely composed of rock.At 0.055 Earth masses , Mercury is the smallest terrestrial planet( and smallest planet) in the Solar system. Earth is the largest Terrestrial planet. These have many moons G IANT PLANETS   :- Four Giant Planets ( Large low density )  -  Jupiter, Saturn, Uranus and Neptun e.  Massive planets significantly more massive than the terrestrials. * GAS GIANTS:- Jupiter and Saturn , are giant planets primarily composed of hydrogen and hel...

Black holes are regions ofospace that have such strong gravity , nothing can escape  them, Black hole is a place in space where gravity pulls so much that even light can not get out. The gravity is so strong because matter has been squeezed into a tiny space. Can we see the Black holes :- People can't see black holes, because no light can get out, strong gravity pulls all of the light into the middle of the black hole. They are invisible. Space telescope with special tools can help find black holes. How Big are Black holes? Black holes can be big or small. Scientists think the smallest black holes are as small as just one atom. Another kind of Black hole is called ' stellar .' Its mass can be up 20 times more than the mass of the Sun. There may be many, many stellar mass black holes in Earth's galaxy. Earth's galaxy is called the Milky Way .   The largest Black holes are called ' SUPERMASSIVE ."                 ...