Showing posts with label Stars of the Universe. Show all posts
Showing posts with label Stars of the Universe. Show all posts

Friday, August 12, 2011

Stars of the Universe

Stars of the Universe: "
milky-way-map_atlas-of-the-universe


Stars of the Universe


A star is a huge ball or disk of plasma, which are primarily held together by gravity. On a clear night on Earth, we are able to see a lot of Stars. We can see 3000 stars on a typical night with the UN-sponsored eye. The nearest star to Earth is the sun. Which is the main source of energy for us.


The most visible stars on the celestial sphere were grouped in constellations. The most brigthest Stars also got names.


For most of a Star’s life, it shines very strongly because of thermonuclear fusion in its core. Which is then radiated in outer space.


A star begins as a dying or collapsing cloud. The cloud consists of helium, helium and other heavy elements. After cloud’s core is very close. So some of the hydrogen is converted to helium. Which is a process called nuclear fusion.


There are 18 different types of stars and groups. Binary stars, black dwarfs, black holes, Brown dwarfs, galaxies, the Main-Sequence Stars, nebulae, neutron stars, Novas, pulsars, quasars, Red Giants, Star Colors, Supergiants, Supernova, variable stars, white dwarf, and a Wolf – Rayet star.


Astronomer’s determine the mass, age and Star when viewing a Star’s spectrum, brightness, and it’s movement through space. Mass of a star decides it’s future.


To get to our nearest star (or closest to the Sun), it would take us about 118, 000 years!


After a star runs out of hydrogen to fuse into helium. So Star dies. A star can die in several ways, depending on the’s type.
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PICTURES OF NATURE & UNIVERSE PHOTOGRAPHY