Tag: Earth

Gravity Power

 

newtonThe genius of Isaac Newton, who in the 17th  century defined gravity and produced a universal law of gravitation laid down the foundations for scientists, theoretical physicists such as Einstein.

Gravity Power

Gravity is pervasive, it affects and influences us all on our planet, in our solar system  and in our universe.

einstein1Astronomy is a hobby/interest of mine I like to learn all about what happens in the cosmos and how our space probes/telescopes are unlocking secrets preciously hidden to us.   Below Ben Gilliland excellently explains how gravity helps  push back the frontiers of space

WE ARE USED TO THINKING OF SPACE FLIGHT as a struggle against gravity. After all, it takes vast, towering rockets filled with hundreds of tonnes of explosive liquids and gases just to give a light-aircraft-sized vehicle enough thrust to break free of the bonds of Earth’s gravity.

Even if you are lucky enough make it into space, there are still endless gravitational hurdles to overcome. Contrary to what Sir Isaac Newton believed, gravity isn’t caused by two massive objects pulling on one-another. Instead, gravity is a by-product of the dents and distortions made by massive objects in the fabric of the Universe. A truly massive object, like a planet, makes a pretty big dent and, when a less massive object, like a spacecraft, strays too close it finds itself ‘falling’ into that dent – it might look as if the spacecraft is being ‘pulled’ towards the planet, but really it is ‘falling’ towards it.

The Solar System is littered with these gravitational pitfalls – a satellite falls towards the Earth, the Earth falls towards the Sun and, in turn, the Sun falls towards the centre of the Milky Way. The only way to stop this fall from becoming a direct plunge is to move through space fast enough to ensure your momentum keeps you aloft.

You can think of the Sun’s gravity as being a little like a wine glass. If you drop an olive into the glass, it will fall straight to the bottom, but, if you spin the glass, you can give the olive enough momentum to roll around the sides without falling in (like a planet orbiting the Sun). Decrease the momentum and its orbit will fall closer; increase it and its orbit moves further away. If you continue to increase the speed, eventually the olive will move so fast that it will achieve ‘escape velocity’ and fly from the glass.

A spacecraft leaving Earth has been given enough momentum to escape Earth’s gravity wine glass, but, if it wants to travel into deep space, it has to find enough momentum to escape the Sun’s gravitational dent. Using rockets isn’t practical because they’d need so much heavy fuel it would be prohibitively expensive to just leave the Earth –so scientists came up with a clever trick called a ‘gravity assist’ manoeuvre,

Also known as the ‘slingshot’ manoeuvre, the technique was first used successfully 40 years ago this week, by Nasa’s Mariner 10 Mercury probe. Instead of struggling against the gravitational pull of the planets, during a gravity assist, a spacecraft uses a planet’s gravity (or a series of planets) to give it a speed boost. By falling towards a planet that is falling towards the Sun, a spacecraft can ‘steal’ enough momentum to travel against the Sun’s gravitational pull.

So you could say that spaceflight isn’t flying at all: it’s just falling, with style.

 

 

A spacecraft leaving Earth has been given enough momentum to escape Earth’s gravity wine glass, but, if it wants to travel into deep space, it has to find enough momentum to escape the Sun’s gravitational dent. Using rockets isn’t practical because they’d need so much heavy fuel it would be prohibitively expensive to just leave the Earth –so scientists came up with a clever trick called a ‘gravity assist’ manoeuvre,

Also known as the ‘slingshot’ manoeuvre, the technique was first used successfully 40 years ago this week, by Nasa’s Mariner 10 Mercury probe. Instead of struggling against the gravitational pull of the planets, during a gravity assist, a spacecraft uses a planet’s gravity (or a series of planets) to give it a speed boost. By falling towards a planet that is falling towards the Sun, a spacecraft can ‘steal’ enough momentum to travel against the Sun’s gravitational pull.

So you could say that spaceflight isn’t flying at all: it’s just falling, with style.

The Moon

Supermoon by PH Morton

The Moon

At the start of one of my all time favourite movies and novel, a sci-fi masterpiece, 2001 A Space Odyssey, the scene is the dawn of man, approximately 3 million years ago when apes where evolving into primitive humans (hominids) One  family group of hominids is settling down for the night. One the man-apes looks up to the starry night sky and beholds a large bright shining object, he is fascinated by it. He is the first of his kind to do so. Since that time we could be so real, humans have been intrigued and enthralled by our close celestial sibling we call the moon.

Astronomically speaking the moon is on our door step, its distance being 363,104 km (225,622 miles) from earth. The moon is believed to have been created approx 4.5 billion years ago. At this time it is believed that a Mars size object collided with the primitive earth, resulting in an enormous and massive ejection of material from earth that later formed the moon. The diameter of the Moon is 3,474 km. ( 2,159 miles). It is approximately a 1/4 size of the earth, which in ratio makes the earth – like moon combination the largest in the solar system. The moon is the fifth largest satellite in the solar system.

The Moon is actually moving away from the earth  spinning away  at the rate of 3.78cm (1.48in) per year. Without the Moon, the Earth could slow down enough to become unstable, but this would take billions of years for any effect to be noticed.

533257_590992367609785_244881891_nSince early humans did gaze up and look at the moon, it has become the source of folklore, mysticism, pagan worship. It

khalil

 

 

PEACE AND GOODWILL Christmas, New Year AND Beyond…

 

Global Granary of Nations

Global Granary of Nations

Christmas and the New Year period is normally one of peace and finding good cheer, love and friendship with one another. A tranquil time settles just after Christmas Eve and Day festivities. We hope such will extend beyond January 1st and those good nations with good people sadly suffering from turmoil and troubles, will find peace and good will in the coming year.

Despite our fears, frailties and shortcomings, we are all human beings, being ultimately from the same race. The majority of us try and show goodwill and fellowship to each other.  Those that are fundamentalist whether religious or political and who have their own agendas to gain personal power at any level and by any means, should be marginalised and common sense from the common people should prevail.

We the sensible people, know that those who preach radicalism, hate and intolerance, do not pay heed to the true words and meaning  uttered by our God, saviour, prophet, spiritual teacher, master.

We experience those policitians who become corrupted by power and who become isolated from the people they are meant to govern and serve.

Leaders of nations must reflect and act upon what we want & desire to make our fragile planet safer, calmer and free from wars, conflicts, terror and pollution. They must look to conserve at home and not needlessy, imperialistically for profit or self interest interfere in other nations, unless asked to do and benefit for the people does result.

We are merely stewards that pass this way once on earth. We owe it to our children and descendants to leave a fit healthy place to live and evolve.

As Sir Thomas More proposed in the 16th Century England, will we ever see an Utopian society, with nations based on rational thought, with communal property, great productivity, free from avarice,  no class distinctions, no poverty, little crime or immoral behavior, religious tolerance, and little inclination to war including no racial and religious divides among its’ peoples.

I do not think this state is hard to achieve, only in the minds of those who do not aspire.

Let’s make our global home safe, habitable like we want our own family homes to be…

We at Global Granary sincerely wish all our viewers & visitors a Very Merry Christmas and A Peaceful New Year in 2013.

We truly look forward to hearing from you.

Life in the Universe: Intelligent Design and Panspermia Theories

 Not only is the universe stranger than we imagine, it is stranger than we can imagine.
– Sir Arthur Eddington

Bombardment of  our planet from space in it’s eary history,  could organic material have hitched a ride to a primitive Earth?

It is now certain that the universe was created around 14 billion years ago via the Big Bang,  the ultimate explosion in nature which spewed out early elements such as hydrogen which is the prime element of all the stars in the universe which later became synthesised into other elements as the  stars evolved billions of years later in the expanding universe.
Our own solar system and planet Earth formed around 5 billion years ago. Earth and life being nurtured  relied  on the necessary  higher elements in chemistry’s periodic table that were forged into existence under conditions of enormous pressure and temperature created by the rare (second only to the Big Bang in size and power)  explosion(supernova) of a nearby massive star billions of years before the creation of our solar system.
Whether there was intelligent design behind the creation of our universe is a debate always raging  between the ians, ics and ists -theologians, agnostics, atheists, scientists and physicists. What became before the Big Bang is a void in our knowledge  with various learned theories vying to fill it.
Sir Fred Hoyle an eminent British scientist who worked at the frontiers of astronomy and theoretical physics published in 1983 a well-illustrated popular book for non-scientists called ‘The intelligent Universe’   in which he challenged  the whole idea that life originated and evolved on Earth and replaced it by ‘intelligent cosmic control’
In relation to the heavy element carbon so important to life and created in supernovae he said in the book
Would you not say to yourself, “Some super-calculating intellect must have designed the properties of the carbon atom, otherwise the chance of my finding such an atom through the blind forces of nature would be utterly minuscule?” Of course you would. . . . A common sense interpretation of the facts suggests that a superintellect has monkeyed with physics, as well as with chemistry and biology, and that there are no blind forces worth speaking about in nature. The numbers one calculates from the facts seem to me so overwhelming as to put this conclusion almost beyond question“.
Hoyle proposed also another theory now becoming widely accepted that life on the newly forming earth was in all likely seeded by organic molecules or organisms contained in space debris such as meteorites and comets that collided with the primitive earth billions of years ago when such bombardments were common.   These compounds or bacteria,  helped kick start life  after arriving on earth and mixing with existing organic compounds, fermenting in the primordial soup where life ultimately originated .

Panspermia theory life seeded on planets from space

This hypothesis that life exists throughout the Universe, distributed by  meteoroids comets, asteroids planetoids etc., is called Panspermia.
Panspermia proposes that life forms that can survive the effects of space. Such organisms/bacteria that can survive in the harsh conditions of space or places on earth are known as  extremophiles. Extremophiles could have  become trapped in debris that is ejected into space after collisions between planets that harbour life,  Bacteria may travel dormant for an extended amount of time before colliding randomly with other planets or intermingling with protoplanetary disks or evolving planets If the conditions are ideal on a new planet’s surface such as having liquid water or the compounds to sustain life, the bacteria become active and the process of evolution begins. Panspermia is not meant to demonstrate how life began, just the catalyst that may cause creation.

Intelligent universe: Structure of  a brain micrometre across (left) and computerised structure of the universe                                                               Billions of Light Years across  (right) Note the similarities -Thought provoking!

September

SeptIt is the first of September today. In some countries, this is now leading to the Christmas season. I have been told that when a month end in “ber” then Christmas is in the air.

A couple more weeks and we would see shopping centres and department stores starting on their display of Christmas decorations and of course an array of ‘must have’ gifts to be had.

September is the 9th month of the year in both the Julian and Gregorian calendars. It has 30 days.

Did you know?

September is the start of the Christmas season in the Philippines. All the months ending in BER is prelude to Christmas.

If you know of anyone born in September, you can't go wrong in buying them a sapphire; it is the month's birthstoneIf you know of anyone born in September, you can’t go wrong in buying them a sapphire; it is the month’s birthstone

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Forget-me-not is the flower for the month of September. Don't forget to check the legend of forget me not in this site.
Forget-me-not is the flower for the month of September. Don’t forget to check the legend of forget me not in this site.
Do you remember the 21st night of September?
Love was changing the mind of pretenders
While chasing the clouds away

Our hearts were ringing
In the key that our souls were singing
As we danced in the night
Remember, how the stars stole the night away, yeah yeah yeah

Hey hey hey
Ba de ya, say do you remember
Ba de ya, dancing in September
Ba de ya, never was a cloudy day

Ba duda, ba duda, ba duda, badu
Ba duda, badu, ba duda, badu
Ba duda, badu, ba duda

My thoughts are with you
Holding hands with your heart to see you
Only blue talk and love
Remember, how we knew love was here to stay

Now December found the love that we shared in September
Only blue talk and love
Remember, the true love we share today

Hey hey hey
Ba de ya, say do you remember
Ba de ya, dancing in September
Ba de ya, never was a cloudy day

There was a
Ba de ya, say do you remember
Ba de ya, dancing in September
Ba de ya, golden dreams were shiny days

Now our bell was ringing, aha
Our souls were singing
Do you remember every cloudy day, yau

There was a
Ba de ya, say do you remember
Ba de ya, dancing in September
Ba de ya, never was a cloudy day

There was a
Ba de ya, say do you remember
Ba de ya, dancing in September
Ba de ya, golden dreams were shiny days

Ba de ya de ya de ya
Ba de ya de ya de ya
Ba de ya de ya de ya de ya
Ba de ya de ya de ya
Ba de ya de ya de ya
Ba de ya de ya de ya de ya

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Notable Dates for September:

2 September 1666 – start of the great fire of London.

4 September 1909 – First Boy Scout rally was held at the Crystal Palace.

28 September 1923, Radio Times was first published.

29 September 1829, English bobbies (police) started patrolling.

 

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