STARS

                                                                                         

We see lots of stars on a clear night. A star is glowing ball of gases which gives off heat and light. Stars are very big in size. They look very small as they are far away from us. You can see star even during the day, it is our Sun.

In the Sun, the nuclear reaction which occurs is called the proton-proton cycle, in which four Hydrogen atoms are combined in a series of reactions to form one Helium atom; this chain of reactions also produces energy (in the form of gamma rays) and some other particles called neutrinos. Stars are formed when large cloud of gases (called nebula) collapse at certain point.

“Forget Jesus!   The stars died so that you could be here today.  Every atom in your body came from a star that exploded”. -Lawrence Krauss

Some facts about stars:

• Closest star to Earth is SUN.
• Closest star to Sun is Proxima Centauri (4.2 light years) .
• Venus is also called morning and evening star. 
• Black Hole is formed when giant star (above 30 times bigger than our sun) collapses under its own weight (when nuclear fusion is finished).
• Neutron stars are the densest and smallest stars known to exist in the Universe; with a radius of only about 11–11.5 km (7 miles), they can have a mass of about twice that of the Sun. The teaspoon of the neutron star weight more than everyone on earth combined. Neutron star can rotate 500 times in 1 second.
• Eta Carinae is one of the largest stars in the known galaxy.
• There are approximately 400 billion stars in the Milky Way galaxy alone.
• The coolest stars in the universe are red, opposite to that, the hottest stars are blue.
• Stars twinkle because we see them through the wafting of the atmosphere.
• Bigger the star shorter the life, because fuel burning for nuclear fusion is high.
• We are all star dust.
• The PISTON star is the most luminous star known and 10 million times the brightness of the sun.
• When we looking at the star we actually looking into the past. Many of the stars we see at night are already died.
• There are an estimated 70 sextillion stars in the known universe (70,000,000,000,000,000,000,000).