Death of the solar system?




Don't be shocked when you see the title , this event is gonna happen 7.5 billion years from now . So what actually gonna happen lets see about it

Everything in this universe have start and end ,so when it comes to the our solar system our doomsday will be cause by sun.

Since sun has 99.6 % percentage of mass contribution in our solar system. It generally have high gravity towards its core,so this means that the core should have been collapse ,but the thing that saves is the formation of helium due to nuclear fusion  happening at the core and emitting energy outside making it stable.

But after 5 billion years all your h2 molecule will totally be converted to helium  atoms.
from there the catastrophic begins .It is because for helium nuclear fusion we need 100 million kelvin which is 10 times the temperature of sun's core , this leads to a  diffusion of helium to hydrogen and a thin white layer is formed and a cycle of formation and diffusion of helium will happen , this till makes the star stable but  since all of its mass was burned out the gravity pull to the outer layer of sun will reduces ,thus the outer layer starts to expand slowly and the color changes from yellow to orange and finally end up with red after 1-2 billion years the sun will will 10 times bigger than its original size and become a red giant.


Image result for white shelf happening inside a red giant
After  its maximum expansion  the white shell starts the deplete because of all electrons ,protons  are converted to neutrons and that neutrons started to compress at the core till the degeneracy pressure. and this pressure makes the core to reach 100 million kelvin and nuclear fusion of helium will happen and we get carbon as output . 

After that a huge blast will happen causing all masses present in the sun except the core to escape and the core starts to compress at a size of earth with 100000 times gravity than earth.





This blast is termed as planetary nebula and this blast will happen 100 million years after the depletion of white shelf . this core is termed as white dwarf and will exists for billions of years till it run  out fuel. 

Gravitational Waves




What is gravitational waves?How scientist find them?Why we need to study about gravity waves. Let discuss about this one by one.

Lets start with what is a gravitational wave,for that we first need to know what is gravity?

Gravity is define as the force created by space time depth of a particular object. Generally we study only 3D space but there is another dimension that is time.This 4d dimension was discovered by Einstein in his theory of relativity.



So gravitational waves are caused because disturbance in gravity .This disturbance happens when the object moves or in motion.This concept was put forth by Einstein  and later his theory was proved to be real,when scientist detect them in 2015.

Now lets discuss about how scientist identify or detect these waves :

For this LIGO(Laser Interferometer Gravitational Observatory ) setup a observation center in Livingston,Hartford . the observation look like this





There are totally four components that is a sensor, detector ,a beam splitter,two reflectors






In this a laser beam is send to  the beam splitter ,from there it is been reflected and refracted to two reflectors after that the waves are reflected back to beam splitter,then send to detector.

Generally these both splitted waves have same magnitude under normal conditions and since they paths are opposite , they generally cancel each other.

But when hitted by gravitational waves there is change in  wavelength,phase between two waves .

But the problem is that this change is every minor and it is difficult to detect this.

But in 2015 we detect a gravitational waves .How come?


This gravitational waves was caused due to collision for two black holes which is located 13 million light years from earth with mass 30 times bigger  than sun. So the wave is more stronger than the normal waves caused by sun or other planets.


And another one is detect on 2017 from a collision of two neutron stars





So let discuss why scientist research about gravitational waves

Unlike light, nothing a stop the pathway of gravitational waves.So we can identify different black holes collision,stars collision at quicker time period.

Scientist believe that we can also find how big bang happen with the help of gravitational waves 

Why universe is expanding?|the big bang theory|dark energy|



On our previous content we talk  in detail about universe expanding. So now we gonna discuss why universe is expanding?

Scientist predicted that this expands because of the potential gain by big bang. so what is big bang? 


Let me explain:


Big bang is explosion happen which causes a blast of all particles which leads to formation of planets ,then galaxies, cluster and finally a whole universe.


But the interesting fact is that till now we don't know what  caused big bang.


This theory was proposed by Georges Leminez who is now called as father of big bang in 1927 . His theory was solidified by Hubble in 1930  ,he found that all galaxies were flying away from each other in all directions. So scientists conjectured that in distant past (13.8 billion years ago) all the matter of the universe was confined to a single point called Singularity which exploded with a big bang. Then George Gammow and other scientists predicted hot big bang. They calculated the temperature of the cooled universe at present time. This was experimentally verified by Wilson and Penzias to be 2.7 degree Kelvin. This established the big bang theory as a viable theory.


The second reason that put ford by the scientist is dark energy 

Dark energy describes an unknown form of energy affects the universe on the largest scales.The first observation evidence for its existence was made through supernovae measurements that showed the universe is accelerating.


That  observation happen  in 1998 the high z supernova search team published any observation of type la (" one A") and this was supported by the supernova cosmology team in 1999


They estimate that the dark energy contributes 68% percent of the total mass of observable universe.However the density of dark energy is very low(-7x 10power-30 g/cmcube).


 

What is Dark matter?



The name dark matter  given to them as these matter neither absorb or emit light .Then you have a doubt ? when and how did scientist discover dark matter


It all started with a astronomer Rickey in 1939 . He observe a strange thing happening when he observe coma cluster(cluster means group of thousands of galaxies together),that is the revolution of the galaxy in that cluster have much  400 times higher than the theoretical revolution calculated from the normal matter in that galaxy


 This means that there should be some other type of matter which cause gravitation and increase the revolution speed.he named this matter as dark matter.
Another scientist  Vera ruby experience a strange behavior when observing a galaxy that is the as per the gravitation the outer planet of that galaxy should revolve slower than the original speed.
  

So this is the history of discovering dark matter.so you ask is there is any evidence for this .


For this scientist use a technique called gravitational lensing . this is basically when a bigger galaxy over lapses are smaller galaxy.The bigger galaxy bends the space time around it so the the light from the smaller galaxy need to travel that path to reach us .so we get a image where the smaller galaxy which is behind the galaxy to be located in the edges of the bigger galaxy.
 

So if instead of a bigger galaxy .Let us consider a dark matter is present. then we get a image where the behind galaxy at the edges of the image and center will be black region.
 




Here are they



When scientist view Pandora cluster this cluster is located 3.8 billion light years from us.
 when viewing through Hubble telescope we get a image like this

In this the pink regions are regions where hot glass are present.





When two galaxy in that cluster hit each other we see that in blue regions there are gravitational lensing happen and we can't see any galaxy causing it this is because these lensing is cause by dark matter and as we can't see them so the center of the blue region appears to be black. 

Universe Expanding



When you see the topic your mind will go crazy as if there is no such thing ,but the thing is that it is actually the truth .Let us go deep about this expanding of our universe.

  In 1912  astronomer Vesto Slipner observe a under thing ,that is he observe that the wavelength of galaxy starts reducing with time. from Doppler effect of sound we see that the wavelength of sound we receive reduces as the object moves away from us. So when we apply this logic we come to the conclusion that universe is expanding.he term this effect as cosmological redshift.

You have a doubt that we can say that the galaxy which observe moves away from us not the whole universe ,but actually it is not

Let me explain with cookie

 Consider the outer layer as our space time and all the galaxy as the chocolate above it inside it .When we heat the cookie we see that outer layer is expanding and not the chocolate .So it is the universe expanding not the galaxy

1929 Sir Edwin Hubble discovers the rate of expanding of universe 


He identify this by plotting a graph between velocity of  some particular galaxy moving vs the distance from us.   

We can find the velocity of galaxy moving or redshift by the observing the change in wavelength receive with time.

For the distance he use standard candle method . in this he observe scifi stars ,these stars emit varying intensity that is they emit high intensity at day 1 ,low on day 2,high on the next day.




 With this varying intensity we can find the distance by using this formula

b=L/4pi(dsquare)

where b is apparent brightness and L is luminous intensity

So on plotting he get a graph like this





From the graph he find that  the hubble constant is equal to gradient of the graph.

From this we get hubble constant value as 72km/s/MPC.

   Here 1 MPC is equal to 3.26 million light year . this speed is for on 1MPC and this speed we double for next MPC.

Fun fact is that we can find the age of universe from hubble constant 


It is equal to the inverse of hubble constant: Age=1/ho



  

10 Most Important Automobile Tech Milestone


Take a look at the cars of 1991 is all you need to realize how much technology has changed the auto industry in a quarter-century. Here are 10 of the most important automotive advancements and milestones of the last 25 years
10.Electronically Controlled Torque Vectoring Differential, 1996
<p>Mitsubishi was one of the first manufacturers to offer a differential that could be electronically controlled. The system was called Active Yaw Control and was available on its high performance Evolution model in the late 1990s. Unfortunately, we in America didn't get the Evo until 2003. But today, active differentials that use electronics to send torque across an axle are found in many high performance cars.
</p><p><br></p><p>If equipped on both the front and rear axles of an all-wheel drive car, these sophisticated differentials can direct the vehicle's torque to any wheel in any amount at any moment. That not only improves handling when the driver is pushing hard, but also improves the around town drivability and traction in foul weather, without any drawbacks. And this tech isn't just for sports cars. The Land Rover LR4, for instance, has an electronic rear differential that can fully lock for a rocky trail and unlock in varying degrees for smooth operation on the street.</p>
Mitsubishi was one of the first manufacturers to offer a differential that could be electronically controlled. The system was called Active Yaw Control and was available on its high performance Evolution model in the late 1990s. 
If equipped on both the front and rear axles of an all-wheel drive car, these sophisticated differentials can direct the vehicle's torque to any wheel in any amount at any moment. That not only improves handling when the driver is pushing hard, but also improves the around town drivability and traction in foul weather, without any drawbacks. 


9.Dual Clutch Transmission, 2003
Basically, advanced dual clutch transmissions (DCT) offer the benefits of a traditional automatic transmission with none of the drawbacks. On a six-speed DCT gearbox, for instance, one clutch shifts the odd gears (1, 3 and 5) and the other one handles even gears (2, 4 and 6). The twin clutches allow the driver to shift gears seamlessly with incredible speed. The result is something as easy to use as an automatic but with quicker shifts than a manual.
Dual clutch transmissions have been used in racing since the 1980s. Volkswagen was the first to popularize the transmission and democratize its use in relatively pedestrian cars. VW's dual clutch transmission, called DSG, was launched in mainstream performance vehicles like the GTI in 2003.

 8.Advanced Turbocharging Goes Mainstream, 2008



Turbos have been used on production cars since the 1960s. These compressors, driven by the vehicle's exhaust gasses, force more air into the cylinders. When combined with more fuel, that results in more power. Turbos can make a small engine perform like a much larger one.

Both GM and Ford introduced small turbocharged engines in the 2008-2009 timeframe that signaled the tech had matured enough to install in the company's least-expensive cars. Now automakers could use smaller, more efficient turbo engines and retain (or even exceed) the power levels of larger engines. Today, nearly every manufacturer has downsized its engines to smaller turbocharged ones with a boost in performance and fuel economy  


 7.Mandatory Tire Pressure Monitoring, 2000



It's no coincidence that we see far fewer cars parked on the side of the road with a flat tire these days? Big improvements in tire technology had a lot to do with it, and run-flat tires have enjoyed a spike in popularity over the past two decades. But the standardization of tire pressure monitoring systems (TPMS) in cars means that owners are warned about their under-inflated tires before real trouble happens.

There are two types of systems. Indirect TPMS uses the anti-lock braking system and wheel speed sensors to notice if tires are spinning faster than they should, indicating reduced air pressure. A light illuminates when the tire is 25 percent below a pressure threshold. Direct TPMS is far more accurate and uses pressure sensors inside each wheel to measure tire pressure and send it to your vehicle's information center.

The first TPMS was available on the Porsche 959 supercar in the late 1980s. But it took new laws, sparked by outrage over the Firestone/Ford Explorer rollovers of the 1990s.

6.Rear View Backup Camera, 2002
 

Until the early 2000s, the only ways to know what was happening behind your car as you backed out of the driveway were to look at your trusty mirrors or to crane your neck and look out the rear windshield. Neither approach could cover the area directly behind the car, putting children and pets at risk. In 2002, Infiniti launched a lifesaver with the first backup camera available in the new Q45. With a camera mounted below the trunk lid and a monitor in the dash, these early systems saved lives and made parking far easier for thousands of car owners. Later in the decade, Nissan introduced its Around View Monitor, which used multiple cameras to produce a 360-degree perimeter picture of the area around the car. Some of the best systems, like the one in the new Mercedes-Benz E-Class, even provide enough detail to spot a curb on the side of the car when parking.



5.Radar-Based Cruise Control, 1999



Lots of little innovations paved the way for the self-driving car future we've been promised. Take the radar cruise control systems that began to arrive in the early 2000s. Where older cruise control systems could maintain the car's speed, these new ones could also maintain a safe distance to the car in front without driver intervention, even if that car changes its speed. Mercedes-Benz was one of the first to debut this tech when Distronic launched in the 2000 S-Class.

As the technology has advanced, it has gotten more ambitious. On many vehicles, the tech behind this same radar system is used in collision avoidance systems that warn a driver they're in danger, apply full brake power automatically, or both. Mercedes-Benz added the ability to steer just three years ago, and last year Tesla enabled its somewhat controversial Autopilot with fully autonomous control. Someday in the future, when your car really does all the driving, remember that it all started with a relatively small improvement in cruise control.


 4.Airbags Everywhere, 1998

Airbags have saved tens of thousands of people since then, and the success of driver and passenger bags lead to a proliferation of airbags around the cabin. Today, even a humble compact sedan has driver and passenger airbags in addition to side-impact airbags and side curtain airbags that trigger in the event of a rollover.

 3.GPS Satellite Navigation, 2000


Automakers began to offer navigation systems that relied at least partially on Global Positioning System satellites in the mid-to-late 1990s. Oldsmobile was the first in the U.S, with Guidestar in 1995, but the U.S. government deliberately degraded the signals given to Guidestar. In 2000, the true precision of GPS came to civilians, and soon after, automakers began developing and installing systems in new luxury vehicles like the BMW 7-Series. It wasn't long before the aftermarket for portable GPS units exploded with new dash-top units. These systems work so well and are so convenient 
that paper maps have basically disappeared from vehicle glove boxes

 2.Stability Control, 1995

Electronic stability control (ESC), which helps correct a skid if your car begins to slide, was the final step in a technical progression that began with anti-lock brakes in the 1970s and 1980s.

As computing power increased and sensors improved (and got cheaper), automakers could apply the brakes to individual wheels to reduce wheel slip and increase traction. Thus, traction control was born. What stability control added was a yaw sensor to determine whether a car was sliding. If ESC detected a slide, the system would apply the brakes on individual wheels to help control the skid and straighten the car's path. Some ESC systems control the throttle to manage power going to the wheels.

Mercedes-Benz and BMW were the first to bring stability control to the luxury market in mid 1990s. Later in the decade it began to trickle into American cars, most notably with the introduction of "Stabilitrak" to the 1997 Cadillac lineup. The technology improved vehicle safety so much, it's been required on all passenger vehicles since 2012.

1.Toyota Prius and the Hybrid Drive train, 1998

No drive train advancement has improved fuel economy more dramatically than the hybrid-electric power train, and today hybrids are so common that it's hard to imagine a time before them. In fact, they're just now old enough to vote.

Toyota was the first to market with a mass-produced hybrid in the form of the 1998 Prius. It combined a dinky 1.5-liter gas engine with an electric motor and nickel-metal hydride battery pack. Not many embraced the tech early on, but the idea was revolutionary and changed the face of the car industry—nearly every automaker has a hybrid or plug-in hybrid in the lineup. 




































World End is Near

When we hear the world end our mind suddenly recollects incident happen in 2012.so lets go back to the year 2012.that was the year were two major incidents happen that were somehow related to each other. they are:

1.Whole world was driven in fear

2. Coronal mass ejection happen in july 23 which can cause a extreme disaster but for god sake we escape from it as we were not in that path of the motion of these waves .they are high energy ejection of solar flares and they consists of high energy particles with electromagnetic radiations.

So what is a solar flare?

Let me explain in detail:

Generally sun has a change in there magnetic direction once 11 years that is change in north and south pole so this cause some spots in sun outer layer called sun spots this region has 1000 deg less than than other surfaces.When two sun spots were close to each other that acts as a magnet and field line flow between them and this leads to a ejection of high energy electromagnetic radiation upto 10power25 joules.

But since our earth has a magnetic field protection we don't have much impact because of this and in pole ends the field strength will be low and we see "aurora borealis" there.

Coronal Mass Ejection(CME):

In coronal mass ejection the of billion tons of super heated gas into space at over one million miles per hour they cause by powerful eruption in solar flares due to instabilities of magnetic field,even our magnetic protection won't helps us this time .



First CME was occur in  sep 1-2 1859 and they encounter these things 

They witnessing  magnificent display of the auroral lights. The phenomenon was very similar to the display on Sunday night, though at times the light was, if possible, more brilliant, and the prismatic hues more varied and gorgeous. The light appeared to cover the whole firmament, apparently like a luminous cloud, through which the stars of the larger magnitude indistinctly shone. The light was greater than that of the moon at its full, but had an indescribable softness and delicacy that seemed to envelop everything upon which it rested. 

and disrupt in radio signal and explosion of electronic devices at that time since the technology was not that much that event became a beautiful event .,but now technology improved at a peak level . we live in a electronic world .

so what damage do they really cause now?These are the prediction in with hit by a coronal mass ejection.

1.As they produce high energy a em waves all the electronic ,electrical devices will explode throughout our planet causing long lasting of power outages.

2.They can disrupt radio transmission,destroy all satellites.

3. The estimated cost to rebuild our planet would be 3 trillion american dollars and it would take decades to recover.     

The probability of CME happen is 12 percent for every decade. you think that it is so small but in reality it is huge because probability of a meteor collision is less than 1 percent.  

Exotic Matter and Negative mass|space time wrap|difference between normal and negative mass

On previous content we saw to  create a worm hole we need exotic matter so

what is this ? For that we need to know about the term  "negative mass". 


Negative Mass:




Generally it is denoted by a mass with opposite sign eg:-1 kg. negative means here violating some energy conditions ,this strange properties or ambiguity can be used for hypotheses in construction of wormholes. as there are gravitational repulsive


When we apply force on negative mass instead of moving in the direction of force they tend to move to the opposite direction.

Interesting right?

Facts of negative mass:

1.When we release negative mass from any height ,when it hit the ground instead of bouncing back it goes inside the ground as they tend to move opposite to the force applied


2.When we keep a positive matter and negative matter ,the negative is attract towards positive one and the positive one will repel by negative ,which lends to chasing each other until they reach the speed of light.



So are these mass exist ? the answer is mostly no as if they exist in a space they form a opposite black hole that is they throw all the particles it made with contact like a mega accelerator 



Exotic matter


Exotic matter is a kind of matter which contains non baryonic matter(they don't have subatomic particles like protons ,neutrons ) they generally contain dark matter,negative energy,negative or complex mass.

Generally in simple terms these are the matter which contains negative mass which we discuss as a major compound .They tend to force on outward direction and have negative energy


 
biz.