The Spitzer Space Telescope

The Universe is continually radiating a wealth of information to Earth, sending signals in wide-spectrum of light. However, not all of these messages reach the ground. Because our planet's atmosphere blocks most radiation coming in from space, humans need to launch telescopes beyond it to get a complete cosmic picture.

Many of the Universe's messages are transmitted in infrared light, which our sky heavily filters. Infrared waves are too long for our eyes to see, but our nerves feel them as heat. In space, any object that has a temperature above zero Kelvin (- 459.67 degrees Fahrenheit, or -273.15 degrees Celsius) radiates in the infrared.

The Spitzer Space Telescope (SST), formerly the Space Infrared Telescope Facility (SIRTF) is an infrared space observatory launched in 2003. It is the fourth and final of the NASA Great Observatories program.

Spitzer is the largest infrared telescope ever launched into space. The Spitzer satellite carries a 0.85-meter telescope and three cryogenically-cooled science instruments. The science instruments are very sensitive, allowing astronomers to peer into regions of the Universe hidden from optical telescopes.

Hot dust. Much of deep space is filled with vast, dense clouds of gas and dust which block our view of visible light.

Fortunately, infrared light can penetrate the clouds of dust and gas, allowing us to see into the centers of galaxies and uncover stars and planetary systems forming.

Cool stars. Infrared light also reveals cooler objects across the Universe. Some of which are smaller stars too dim to be seen in visible light, planets around other stars, and giant clouds of molecules. In fact, many organic and inorganic molecules in space are seen best in infrared light.

How Stars are formed-Nebulae

Each star that we see in the sky is one of a kind...though they all are formed in the same way,

starting with clouds of dust and gas called as nebula.

So how big should a nebula be in order that a Huge Star is born out of it..?

Nebulas are billions of miles across and they drift through space forming various and spectacular shapes.

Each Nebula is a star nursery very many new stars are in the process of being born.

The gas and dust clouds around a nebula are so thick that the process of star formation are hidden to us.Even with the use of telescopes the birth of a star remains hidden within the nebula.

Until NASA launched the Spitzer Space Telescope.The Spitzer Space Telescope is an infrared telescope that means it only recognizes heat.The heat passes through the thick clouds of a nebula allowing Spitzer to witness the birth of a star.

All we need to make a star is hydrogen,gravity and lots of time for gravity to do its work.

What gravity does is it pulls the the dust and gas into a giant squirling vortex.

As gravity does its work more and more matter comes together and squeezing the matter drives the temperature up.As thousands of years pass the discs of the vortex starts getting thicker and at its center gravity crushes the gas into a super dense and super hot ball which forms the core of a star.At this stage the temperature at the core of a star is almost 15 million degree celsius and at this temperature molecules of gas begin to fuse around the young star and just like that a star is born.

The Creator of life it self is born in such a violent process.

See also:- Spitzer Space Telescope

Stars-the Real Creators of everthing that comprises our universe

Stars they are everywhere and they rule the universe...

They are born in violence and when they die, they fill the universe with stardust the building blocks of life..all life begins in the firey core of a star.

How many stars do you think are there in the universe..?

The ones you see at night are just the few hundreds of 100 billion stars that are in our galaxy and as a matter of fact there are more than 100 billion galaxies in the universe.

There are more stars than there are specs of sand on earth.

All these stars are very Far away from earth and there isnt much we know about them but there is one star which is really close to the earth our very own Sun its nothing but a star.

Our Sun is the ultimate source of energy and hence it dominates all life on earth.

Seen from the earth the Sun looks small but in actuality its Immense,we could fit a million earths inside the sun which is a million miles in diameter.

Yet our sun is nothing compared to the really big stars out there

Eta Carinae- over 5 million times larger than our sun.

Betelgeuse- 300 times larger than Eta Carinae.

And the biggest star ever discovered

VY Canis Majoris- A billion times Bigger than our sun.

Stars Burn in different colours red,yellow or blue.

Some are the sole dominators of their Solar System...Some are in pairs orbitting each other.

Coming together these stars Make up entire galaxies,huge cities of stars.

The inhabitants of the Huge Cosmic world

We already know that our solar system has:-

A sun----8 planets and their respective satellites...

We also know that our solar system is situated in the Milky Way Galaxy.

Also there are many such Galaxies which comprise our universe....!!

But is that all..?

well not quite there are many galactic bodies apart from suns and planets..

for example Quasars,White Dwarfs,Black Holes,Red Dwarfs,Neutron Stars,Pulsars,Magnetars....well even scientists dont know how many more exists...

This is Just a short Overview on them full information on them will be coming soon stay tuned...

What we already know about our universe..?

Universe – Overview

The universe was born with the Big Bang as an unimaginably hot, dense point. When the universe was just 10-34 of a second or so old — that is, a hundredth of a billionth of a trillionth of a trillionth of a second in age — it experienced an incredible burst of expansion known as inflation, in which space itself expanded faster than the speed of light. During this period, the universe doubled in size at least 90 times, going from subatomic-sized to golf-ball-sized almost instantaneously.

After inflation, the growth of the universe continued, but at a slower rate. As space expanded, the universe cooled and matter formed. One second after the Big Bang, the universe was filled with neutrons, protons, electrons, anti-electrons, photons and neutrinos.

During the first three minutes of the universe, the light elements were born during a process known as Big Bang nucleosynthesis. Temperatures cooled from 10^32 degrees K to 10^9 degrees K, and protons and neutrons collided to make deuterium, an isotope of hydrogen. Most of the deuterium combined to make helium, and trace amounts of lithium were also generated.

For the first 380,000 years or so, the universe was essentially too hot for light to shine. The heat of creation smashed atoms together with enough force to break them up into a dense plasma, an opaque soup of protons, neutrons and electrons that scattered light like fog.

Roughly 380,000 years after the Big Bang, matter cooled enough for atoms to form during the era of recombination, resulting in a transparent, electrically neutral gas. This set loose the initial flash of light created during the Big Bang, which is detectable today as cosmic microwave background radiation. However, after this point, the universe was plunged into darkness, since no stars or any other bright objects had formed yet.

About 400 million years after the Big Bang, the universe began to emerge from the cosmic dark ages during the epoch of reionization. During this time, which lasted more than a half-billion years, clumps of gas collapsed enough to form the first stars and galaxies, whose energetic ultraviolet light ionized and destroyed most of the neutral hydrogen.

Although the expansion of the universe gradually slowed down as the matter in the universe pulled on itself via gravity, about 5 or 6 billion years after the Big Bang, a mysterious force now called dark energy began speeding up the expansion of the universe again, a phenomenon that continues today.

A little after 9 billion years after the Big Bang, our solar system was born.

and thus started a new era.......