TWINKLE TWINKLE LITTLE STAR..
HOW I WONDER WHT YOU ARE..
UP ABOVE THE WORLD,SO HIGH
LIKE A DIAMOND IN THE SKY⭐
WE ALL HAVE HEARD THIS POETRY IN OUR CHILDHOOD..RIGHT?
SO NOW LET ME TAKE YOU IN THEIR WORLD..!!
Star is an astronomical object consisting of a luminous spheroid of plasma held collectively by its personal gravity.
The life cycle of a star spans billions of years.It may be stated tht, the extra large the star, the shorter its life span.
The beginning of star takes place inside hydrogen based mostly mud clouds known as NEBULAE.Tens of millions of years later, when the core temperature climbs to about 15 million diploma Celsius nuclear fusion begins, igniting the core and setting off the subsequent—and longest—stage of a star’s life, generally known as its essential sequence.
Many of the stars in our galaxy, together with the solar🌅, are categorized as essential sequence stars.They exist in a steady state of nuclear fusion, changing hydrogen to helium and radiating x-rays.
Some stars shine extra brightly than others. Their brightness is an element of how a lot vitality they put out–generally known as luminosity and the way distant from Earth they’re. Coloration can even differ from star to star as a result of their temperatures should not all the identical. Scorching stars seem white or blue, whereas cooler stars seem to have orange or reddish.💥
Stars should not unfold uniformly throughout the universe, however are usually grouped into galaxies together with interstellar fuel and mud. A typical galaxy incorporates a whole bunch of billions of stars, and there are greater than 2 trillion that’s 10 increase to the facility 12 galaxies.😵.
Stars spend 90 p.c of their lives of their essential sequence section. Now round 4.6 billion years previous, Earth’s solar is taken into account an average-size yellow dwarf star, and astronomers predict it would stay in its essential sequence stage for a number of billion extra years.
As stars transfer towards the ends of their lives, a lot of their hydrogen has been transformed to helium. Helium sinks to the star’s core and raises the star’s temperature inflicting its outer shell of scorching gases to develop. These giant, swelling stars are generally known as pink giants. However there are alternative ways a star’s life can finish, and its destiny relies on how large the star is.
Now let’s discuss their varieties..
There are a lot of star classification methods in use right this moment, nevertheless, the Morgan-Keenan system is the simplest to know. Stars are labeled on this system utilizing letters O, B, A, F, G, Okay, and M. They’re labeled based mostly on their temperature the most well liked is O and the good is M. The temperature of every spectral class is then subdivided by the addition of a quantity, 0 stands for the most well liked whereas 9 for the good.
Have you ever ever heard about blue stars??
Now let me inform you about this…
Some of these stars are fairly uncommon with spectral varieties of both O or B. Their temperatures are round 30.000 Okay, with luminosities round 100 to 1 million occasions that of the Solar. They normally have a mass round 2.5 to 90 occasions that of the solar and final about 40 million years.
SO HERE COMES MY FAVOURITE PART..
THAT’S IT FOR TODAY..!