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Mars (Planet)


Mars Taken By Hubble Telescope (NASA)

Mars Facts:
  • The planet Mars is the fourth planet from the Sun in the Solar System.
  • It is named after Mars, the Roman god of war.
  • Mars is known as the "Red Planet" due to iron oxide on the surface giving it a reddish colour.
  • The planet contains a thin atmosphere and has as many of the surface features present on the Moon and Earth.
  • Mars is the most likely planet after the Earth to contain both liquid water, and possibly life.
  • Mars also has two moons, Phobos & Deimos, which may possibly be captured asteroids.
  • Mars can be seen from Earth with the naked eye.
Image Credit: NASA and The Hubble Heritage Team (STScI/AURA) [1] Acknowledgment: J. Bell (Cornell U.) public domain

Tags:
Asteroid - Deimos - Mars - Phobos - Planet -

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Polyurethane (Urethane Polymer)

Polyurethane Facts:
  • Is a polymer consisting of a chain of organic units joined by urethane (carbamate) links.
  • The initial pioneering work (1937) on polyurethane polymers was done by Otto Bayer and coworkers in Leverkusen, Germany.
  • Produces a water resistant fabric.
Tags:
Carbamate - Leverkusen - Otto Bayer - Polymer - Polyurethane - Urethane -


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Mark Foster (Swimmer)


Mark Foster Stockholm (Sweden, 2005)
European Masters Swimming Championships

Mark Foster facts:
  • Born 12 May 1970 in Billericay, Essex, England.
  • Mark is a specialist short course (25 metre pool) swimmer.
  • He is the current short course 50m freestyle world record holder.
This interesting video shows Mark Foster being hustled by The Real Hustle Team on BBC3.
The challenge is whether Foster is able to lift 5 bricks with one hand.




Related Links:
High-Tech Body Swimsuits Give Swimmers A Competitive Edge
Mark Foster: Latest swimsuits blur line between competitors and technology.

Photo Credit - Micebase, (cc)

Tags:
Billericay - Essex - Mark Foster - Swimmer -

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Solar System



Solar System - Planets & Dwarf Planets:


Solar System Facts:
  • Consists of the Sun and the celestial objects bound to it by gravity.
  • They all formed from the collapse of a giant molecular cloud approx 4.6 billion years ago.
Components:
  • Sun
  • Mercury
  • Venus
  • Earth
  • Mars
  • Asteroid belt
  • Jupiter
  • Saturn
  • Uranus
  • Neptune
  • Trans-Neptunian region
Related Links:

Image Credit - Wikimedia Commons, Farry

Tags:
Asteroid Belt - Earth - Jupiter - Mars - Mercury - Neptune - Saturn - Solar System - Sun - Trans-Neptunian Region - Uranus - Venus -

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Sun (Star of our Solar System)


Sun Important Facts:
  • The Sun is the star at the center of our Solar System.
  • The surface has a temperature of approximately 5,780 K (5,510 °C).
  • The surface temperature gives the sun a white color.
  • The Sun lies close to the inner rim of the Milky Way Galaxy's Orion Arm.
Stars listed in ascending size:

Image Credit - Flickr, by ruei_ke, (cc)

Tags:
Aldebaran - Antares - Arcturus - Betelgeuse - Binary Star Cephei - Eta Carinae & Nebula - KY Cygni - Milky Way Galaxy - Mu Cephei - Pollux - Rigel - Sirius - Solar System - Sun - V354 Cephei - V509 Cassiopeiae - VY Canis Majoris

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Comet (General Astronomy)


Comet with 2 tails

A comet is a small celestial body that orbits the sun. The comet nucleus consists of loose collections of ice, dust and small rocky particles. The comet tail is produced by the effects of solar radiation, and always points away from the sun. Comets may range from a kilometer to tens of kilometers wide.

There are many famous comets including Halley, Hale-Bopp, Kohoutek, Hyakutake, Shoemaker-Levy 9 (see here).


Related Links:
Famous or Memorable Comets (Astronomy)


Image Credit - by Andyrob, (cc)

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Mandrill (Mandrillus sphinx) Primate


Mandrill Facts:
  • Mandrill (Mandrillus sphinx) is a primate closely related to the baboons.
  • Locations - found in the tropical rainforests of Congo, Equatorial Guinea, Gabon & southern Cameroon.
  • Social - Socially Mandrills live in large groups, containing females & young with a single dominant male.
  • Males - most other adult males are solitary.

Image credit - Tambako on flickr, (cc)

Tags:
Baboon - Cameroon - Congo - Equitorial Guinea - Gabon - Mandrill - Primate - Rainforest

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Jaguar (Panthera onca) - Big Cat

Jaguar (Panthera onca) Biology:
  • The Jaguar, Panthera Onça.
  • Genus - Panthera.
  • Only Panthera species found in the Americas.
  • One of the big cats - 3rd largest after Tiger & Lion.
  • Resembles the Leopard physically.
  • Largely solitary animal.
  • Enjoys swimming as does the Tiger.
Image - Jaguar Cub (Berlin Zoo):


Jaguar Cub in Berlin Zoo - Image credit - tambako
under (cc)

Tags:
Big Cat - Berlin Zoo - Jaguar -

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Human Behaviour (Psychology and Poem)


Human Behaviour Definition:
  • Behaviour exhibited by humans.

Human Behaviour Poem:

If you ever get close to a human
And human behaviour
Be ready be ready to get confused

There's definitely definitely definitely no logic
To human behaviour
But yet so yet so irresistible

And there's no map to human behaviour

They're terribly terribly terribly terribly moody
Then all of a sudden turn happy
But, oh, to get involved in the exchange
Of human emotions
Is ever so ever so satisfying

And there's no map
And a compass wouldn't help at all

Image & Poem by Andii (cc)

Tags:
Behaviour - Human Behaviour - Logic - Poem

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Procrastination


Procrastination Definition:
  • Human behavior characterized by the deferment of actions or tasks to a later time.
  • To be true procrastination the behaviour should be delaying, needless, and counterproductive.
Procrastination Functions:
  • May be a mechanism for coping with the anxiety associated with starting or completing any task or decision.
  • Normal for people to procrastinate to some degree.
Procrastination Consequences:
  • May result in:
    • Stress
    • Sense of guilt
    • Creation of crisis and disapproval from others (not fulfilling one's commitments).
  • These feelings may lead to further procrastination.
  • Procrastination becomes a problem when it impedes normal functioning.
  • Chronic procrastination can be a sign of an underlying psychological or medical disorder.
Related Links:
Rationality & Procrastination


Image from Emilie Ogez (flickr) (cc)

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Universe (Astronomy, Astrophysics)


Universe Definition:
"The Universe comprises everything that physically exists, the entirety of space and time, all forms of matter and energy, and the physical laws and constants that govern them." [Wikipedia]

Universe Facts:

  • The Universe was born about 13.73 (± 0.12) billion years ago.
  • Diameter of the observable universe is at least 93 billion light years.
  • The largest known star is VY Canis Majoris.
Astrophysics Facts:
"It may seem impossible that two galaxies on opposite sides can be separated by 93 billion light years after only 13 billion years, since special relativity states that matter cannot be accelerated to exceed the speed of light in a localized region of space-time. However, according to general relativity, space can expand with no intrinsic limit on its rate; thus, two galaxies can separate more quickly than the speed of light if the space between them grows. It is uncertain whether the size of the Universe is finite or infinite." [Wikipedia]

WMAP Image (see right):
  • The Cosmic Microwave Background Wilkinson Microwave Anisotropy Probe data seen over the full sky.
  • Average temperature - 2.725 Kelvin.
  • Colours represent the tiny temperature fluctuations.
  • Red regions are warmer and blue regions are colder (by about 0.0002 degrees).
  • Public Domain image from NASA.
Tags:
Astronomy - Astrophysics - Cosmic Microwave background - Universe - VY Canis Majoris - WMAP

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Equuleus ('Little Horse' Constellation)

Equuleus Facts:
  • Constellation in the Southeastern sky.
  • Known as the 'Little Horse'.
  • It is the smallest constellation in the northern hemisphere.
  • The main star in Equuleus is Kitalpha.

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The Local Group (Astronomy)

The Local Group Facts:
  • Family of about 30 big and small galaxies, including the Milky Way.
  • The Milky Way is one of the 3 big galaxies in the group, the others are Andromeda and Triangulum Galaxies.
  • Other members are the satellite galaxies of the Milky Way - the Large Magellic Clouds and the Small Magellic Clouds.
  • The area of the Large Local Group is about 10 million light years in diameter.
Tags:
Andromeda Galaxy - Galaxy - Large Magellic Clouds - Local Group - Milky Way - Small Magellic Clouds - Triangulum Galaxy

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Milky Way Galaxy (Astronomy) Home of Solar System


Milky Way Facts:
  • Home Galaxy of our Solar System.
  • Member of the barred spiral class of galaxies.
  • Diameter is around 100,000 light years across.
  • Spiral arms have a thickness of around 1,000 - 2,000 lightyears.
  • The Sun sits about 25,000 lightyears from the Milky Way centre on the edge of the Orion.
NASA Image Description:
  • The Milky Way is a dusty place.
  • Cannot see the center of the galaxy in visible light.
  • NASA's Spitzer Space Telescope (using infrared wavelength 8 microns) imaging highlights the region's exceptionally bright & dusty clouds, lit up by young massive stars.
  • Individual stars can be seen as tiny dots scattered throughout the dust.

Image - NASA (Public Domain)

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Meteor Showers (Astronomy)

Known active meteor showers:
  • Alpha Capricornids
  • Kappa Cygnids
  • Perseids
  • Piscis Austrinids
  • Southern Delta Aquariids

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Lagrange Points

Lagrange Points Facts:
  • Lagrange points are named after Joseph-Louis Lagrange a Italian-French astronomical mathematician who made the calculations in the 18th Century.
  • They are locations within the Solar System where a 'gravitational well' is produced due to the combined gravitation of the Sun and Earth.
  • At these sites small objects will remain stationary relative to the Earth.
  • There are 5 Lagrange points in the Sun-Earth system.
  • Hypothetical location of the formation of the impact planet Theia (Giant Impact Hypothesis).
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Concept of Theia (Giant Impact Hypothesis)


Giant Impact Hypothesis (Concept of Theia) Details:
  • Earth "Giant Impact Hypothesis" for the formation of the moon.
  • Hypothesis that another planet Theia collided with the proto-Earth 4 billion years ago.
  • Theia possibly formed at one of the Lagrange points close to Earth.
  • As Theia grew it's orbit became unstable, eventually colliding with the proto-Earth.
Image by NASA (Public Domain)

Tags:
Earth - Giant Impact Hypothesis - Hypothesis - Lagrange Points - Moon - Proto-Earth - Theia -


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