under constructions will keep on adding new facts

Basically im not asking questions hence im making this thread to discuss ^^ on my fav topic.
As the topic suggests its all about space.

We can talk of only space and atronomy here no other topics please.

Questions shall be answered by our expert [ hounoured to have him in our tribe and as friend] Winjid preferably but this doesnt mean u cant come up with answers if u know something [about the topic] speak up !!

Okay so let me start.

We are alwasy in search of planets with can sustain life forms or be the place where they can thrive.
For this mission Kepler was launched.
Kepler is a satalite by NASA its aim is to find planets pereferably planets on with things can survive.

So, how does it do so?
A planet when revolutes its star for some times make the light dim. in other words take a light bulb switch it on and move your hand in front of it does your hand not obstruct the light?
This happens for planets too. this is known as TRANSIT.

Kepler looks out for transits.
within 7 weeks of launch it found 600 planets.

But none of them were in habitable zone.
what should be there for a planet to be habitable and whats habitable zone.

A planet should have carbon,water in its liquid form,land and energy probably by a star.
Habitable zone is the best distance from a star in which a life form can evoolve due to comfortable or say liveable temperature.

the closer the planet to star the more the temp the farther it is the less the temp.
If a planet revolutes very fast it means that its near to star if it revolutes too slow it means its too away so we need a planet with one revolution roughly equal to one year of earth.

Which planets are simply out of this list of being able to be place of home?

The planets with star as red giants they are a lot bigger than earth and very bright so this means they also use up energy very fast so they dont give enough time for a species to evolve and before that are destroyed.
The stars with two or more stars together are also out they cant provide stable enviroment. they constitute half of our milkyway galaxy ! and they are all out. But exceptions are there kepler 22 is a double star solar system which has a planet kepler 22 b which is fully made of water and can have organisms.


Also a big size planet is usually just a ball of gas so we need smaller planets roughly size of earth.

so the stars should either be size of our sun or red dwarf but red dwarfs are only 10-20% size of sun and give
only 10-20% enregy as much as of sun. Solution was simple a planet near to it shall get hore heat we had found one such planet but it was tidally locked ie there is no day no noght! The star is pulled by its star and does not move on its axis so one side is very cold and one is hot only the thin line between the two is place where one can acctually live

Keplers biggest achivement is finding KOI 701 a star which has planet KOI 701.04 which is thought to be liveable and is in liveable zone with water and land !


How are stars made?
This is due to war b/w energy and gravity.

First let me say whats a nebula. Nebula is a clouud of dirt[ it looks like so] with amazing colours acctually its gasses like helium oxygen etc which are glowing due to very high temp.
like oxygen glows with green light.

ok so what happens is this gasses have mass obv. gravity tries to make them come together and compress it while the gasses want to expand and move away. but the gasses loose the war gravity wins and compesses them. Due to this lots of energy is produced gases are compresed by gravity and produce heat due to friction.
This energy rises and ultimately a star is born.


How do stars die?

In very big stars

Star make energy by a chemical reaction known as fusion [ we use it in controlled manner in earth to create immense electricity in nuclear power station.]
there is another reaction known as fission but we need not know of it here.
by fussion hydrogen gives out energy and makes helium.
now helium gives energy and makes oxygen and carbon
they make heavier metals like silicon and magnesium.
They make iron.
when iron is made it doesnt give out any energy and core starts to become of iron now the gravity is again trying to compress the whole thing and since there is no more energy the star compresses and blasts making an super nova.

OR

compresses so much that it sucks itself in sucks time sucks the light and everything ie becomes a blackhole.

In smaller stars like our sun death is slow and not so much dramatic they will use up all helium and their crust wears off and a small blast turns the star to a supernova.

nice i like science thats my favorite subject..

Updated

Padu, you are indeed a person who ponders on the protocols and the set of limits and extremities that governs everything around the universe and the universe itself as a whole in cosmology... and transitivily I mean your are very much similar to me... Its great to see someone typing about a subject like the universe in such a lucid and simpler way.. that is veritably an attribute of a genuine scientist. I do not mean to criticize but i have found many mistakes in the post, which I wouldn't mention here but in person... but considering the fact that Human mind tends to make mistakes, a postulate of Murphy's law... i shall try and suppress my trait of highlighting others' mistakes... Even Einstein made one of the mistakes in his Special Theory of Relativity by introducing a Cosmological Constant ( which he claims that is his biggest mistake), So thats all.. well concludingly, Einstein speaks," I think and think for months and years. Ninety-nine times, the conclusion is false. The hundredth time I am right." and i speak of pure experience that.. It's more fun to arrive a conclusion than to justify it... Until next time?

Thanx winjid ^^

How was our galaxy formed?

after a big bang there were lots of gasses in universe this allowed big star formation and this led to many blackholes.
these black holes came together to make a super massive blackhole they started sucking small stars at a point they were overfilled think what will happen if u eat 10000000 burgers at a time?
spill out energy ?
same happened to those black holes
if forgot the name ill tell later but they release energy neams [ gasses] from up and down and loose their most of sucking ability .
they still have mass hence gravity and keep the stars together orbiting around them making an glaxy this is how our milky way galaxy and other galaxies formed

Paduman a dit :

Thanx winjid ^^

How was our galaxy formed?

after a big bang there were lots of gasses in universe this allowed big star formation and this led to many blackholes.
these black holes came together to make a super massive blackhole they started sucking small stars at a point they were overfilled think what will happen if u eat 10000000 burgers at a time?
spill out energy ?
same happened to those black holes
if forgot the name ill tell later but they release energy neams [ gasses] from up and down and loose their most of sucking ability .
they still have mass hence gravity and keep the stars together orbiting around them making an glaxy this is how our milky way galaxy and other galaxies formed

Well said, but one thing should be mentioned at this point, about what was said by one of the best scientists , Stephewn Hawking said, black holes always emit radiations. So it is wrong that only at time of massive taking in of mass it will emit it, it will keep emiting it all the time, this theory is now used to track black holes which might be newly formed or the radiations comming from black holes far away over time.

Subho a dit :

Well said, but one thing should be mentioned at this point, about what was said by one of the best scientists , Stephewn Hawking said, black holes always emit radiations. So it is wrong that only at time of massive taking in of mass it will emit it, it will keep emiting it all the time, this theory is now used to track black holes which might be newly formed or the radiations comming from black holes far away over time.

To be Precise, Black Holes emit Radiations.. (entirely agreed on that point) but it is impossible [ according to the Quantum uncertainity principle] To detect the position and velocity and nature of the radiations, Stephen Hawking calls this theory,"Black Holes are not so Black," (he hasnt officially named it). The Chandrashekar limit ( i.e the limit above which huge or moderate masses of star end their life as a Supernova and ultimately forming a Void of infinte density or a Neuron star aka Pulsar respectively " moderate star = neuron star aka pulsar , Huge star = not so Black hole") and The CMBR (Cosmic Microwave Background Radiation : this is the only proof of existence of Universe originated from a Big Bang singularity) are the ways of finding not so Black holes in the Universe as mentioned by Subho... So basically in simpler words i meant, not so black holes function "somewhat" (not exactly) like a DVD player or a gramophone, the vibrations come out of the source (detected and defined by Dopplers' effect) and! some of it is lost during the laser reader playing the CD or Music DvD (although not so common in DvD player but a lot more observable in the Gramophone) And this lost information is detected by ad hoc hypothetical (ad hoc means not explained properly) Quantum M theory! This is a just a small Idea explained simply about how a not so Black hole functions, Actually to explain something like a not so Black hole i had to introduce Einstein's Special theory of Relativity, i.e 4D Spacetime = 1D time + 3D space... which explains " ONe cannot bend time without involving space" .. Will speak of it later xD

Paduman a dit :

Thanx winjid ^^

How was our galaxy formed?

after a big bang there were lots of gasses in universe this allowed big star formation and this led to many blackholes.
these black holes came together to make a super massive blackhole they started sucking small stars at a point they were overfilled think what will happen if u eat 10000000 burgers at a time?
spill out energy ?
same happened to those black holes
if forgot the name ill tell later but they release energy neams [ gasses] from up and down and loose their most of sucking ability .
they still have mass hence gravity and keep the stars together orbiting around them making an glaxy this is how our milky way galaxy and other galaxies formed

Padu, by saying "there were lots of gasses after the big bang" you need to be precise by the time at which happened ... immediately after the big bang, (maybe 10 to the power of -27 seconds : which is really fast) Quarks and Antiquarks were created, much later after it Leptons and anti-leptons were created, then much much later that is maybe 10 to the power of -8, Quarks and Leptons collided with each other forming what we know now as Hydrogen and the Anti quarks and anti leptons formed Anti-Hydrogen :)
Then Much Later, much much much much later others gases like Helium were formed.. :) Even i do not know the time or in which era of time it happened xD I'll find out though... [will mention the name here in square brackets]
and YES... Blackholes that are really old are called Primordial Blackholes...
now remember Matter and Antimatter are created in equal content so why wasnt it annhilated the moment they were created? The reasont to this is the Quantum M theory and the Heisenberg Uncertainity extremity.. they are much complicated so I'd request you to read about it :)
Plz Note That : Theory of Relativity deals with the Large, and Quantum Theory deals with the small... Scientists are working on coming up with a Unified Theory that links both of them. Work is still on..
Forgive me if i bored you or spoke too much.. :( this was just one drawback i found to comment upon xD there are quite a few more but... LoL I'd mention them in person?? Sorry again... Plz do ask me about it, I tend to forget and make mistakes too :)

wow o.o so long

Happyssssss a dit :

wow o.o so long

Wow Appy, Its great to see you typing here!