What if a satellite went around the Earth in the opposite direction?

The animation shows retrograde and prograde rotation of celestial objects in Space.

The Earth is known to spin in the counter-clockwise direction when viewed from the top. It is known to spin at 1670 Km/hr which is extremely fast considering the size of the planet. From Earth, satellites are traditionally sent to space to rotate in the direction of the earth's rotation. This is normally done because of the speed advantage that the Earth provides to the satellite adding 1670 Km/hr to the speed of the satellites rotation this is known as a prograde orbit. Rotation in the opposite direction is known as retrograde orbits.

Why time runs fast and slow in different situations?

Time is always running. Its speed neither changes nor can it be changed, or can it?

 When we are engrossed in some work time flies but at the same time, for somebody else time must be moving extremely slow because they are going through a boring work day. The simplest explanation for this is diversion. When we are diverted, we don't pay attention to time. Thats why it moves so fast. If we are not diverted, time moves very slowly. The same can be experienced while watching a film. A good film will cause time to just fly by but a bad film will bore you.

That was the reasonable explanation but what if we go the fictional route. Einstein said time is relative and that it changes in different points in the universe. Maybe doing important work will full dedication has the same consequence of time running quickly. If this were true, all of us should be at different points in the day but that does not happen. Thats why I started the paragraph stating that I was taking the fictional route. 

Time is a relative quantity and cannot be controlled. But it looks like we can control the speed at which time runs for us. If you're busy then you know time is going to fly. I have had experiences of time flying while studying during examinations. Time is damn slow during lectures. I believe most people have the same experience. 

If time runs differently for different people then there must be a way to control it. We don't have the power to control time yet but the speed of time can be controlled by us. We do it without even knowing, knowing that time will fly in certain situations. Its pretty confusing but I hope I was able to convey what I wanted to say. 

What can gravitational lensing indicate?

Gravitational lensing is a phenomenon that has often occured in Space. It is the bending of light from a light source over long distances. The observer usually sees a hollow circle of light rather than the entire light source. This phenomenon itself is intriguing but it could indicate the presence of a black hole.

A black hole has been known to be so strong that it has the capability of bending light. The problem with just determening the presence of a black hole from this phenomenon may not be able to tell us the location of this black hole. Since the light is reaching the observer from a very long distance, the black hole could be anywhere in between.

Lensing might also occur due to scattering of light. There could be millions of celestial objects between the observer and the light source. Anything that could cause refraction or reflection can cause this phenomenon. It would all depend on the angle at which the light source is observed. The name is gravitational lensing becuse light is known to bend only in the presence of a lens or gravity.

Finally its just light bending because of the effect of gravity and the distance the light has to travel. Lensing only occurs with far off light sources so you could only imagine the intensity of brightness at the source.

Thanks for reading!      

Why string theory doesn't add up?

String theory suggests that the point-like particels in particle physics are represented as one dimensional strings. Now there is a model of the universe that is built on string theory which is what doesn't add up for me. This model shows space as a blanket of strings on which everything in the universe sits.

The revolution of the Earth around the Sun and the moon around the Earth make sense in this model. But what about objects that are in continuous motion and aren't revolving around any object like asteroids. If space were a blanket of stirngs, that would mean that there should be a sense of direction as well in Space. But that just isn't there. There probably is a criss cross of blankets in space. This only complicates things instead of simplifying it. Since string theory is supposed to represent everything in one dimension, Space just cannot be understood with this theory.

Finally these are just theories and haven't been prooven. Actually it isn't possible to proove such theories because they have just been made up to make it easier for the understanding of the universe. Using string theory for the secrets of the universe isn't going to give you too many ground breaking answers.

Thanks for reading! 

Why time is so complicated?

I look at a watch, see that seconds hand moving continuously and only beg to wonder, how does time run continuously and why don't we have a way to stop it?

According to Newton's first law, anything moving in a particular direction will keep moving in the same direction till an external force is applied to it. This works for almost everything but there is no force that can stop the continuous movement of time. Maybe what we perceive as time may not be what nature thinks of as time. We use numbers on our watch faces and use days and Years to determine how much time it has taken for an event. For nature, time maybe non-existant and we have just made it a very big deal. So why make it a big deal?

Humans have the ability to process death and we fear it. That's one reason why we are always worried about the amount of time we have to live on this planet. This also drives us to do enjoyable things over boring activities because it gives you more happiness in that short span of life. Time is so important for us because we have so many things to do in so less time. We humans have deadlines which always makes you think of time. If you compare humans to the nature of Earth, you realise that the things you are doing aren't contributing to the cycle of nature as much as making your life better. Everythig else in nature contributes to the cycle of nature during its entire life span. This maybe a reason for why time doesnt matter to nature. 

The next thing that intrigues me is the relativity theory that says that time changes when we move to other parts of the universe. Even an astronaut on the ISS for 6 months is 0.0007 seconds younger when he/she comes back to Earth. I dont understand this. How can our body clock change according to our surroundings? The activities we do don't change in any way. The clock on your wrist would still run at the same pace. So theoretically speaking you should have the same life span that you would have on Earth. But thats not the case according to Einstein. This theory is beyond my understanding.   

This is why the topic of this post is 'Why is time so complicated?'. Its beyond my understanding but the moment humans are able to control time, Physics would have failed as the entire subject would have been a big lie.

Thanks for reading!