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Physics : 15 of 198

 
         
             
    The Sun, Center of our Solar System
  The Sun, Center of our Solar System
The Sun is the closest star to Earth and is the center of our solar system. A giant, spinning ball of very hot gas, the Sun is fueled by nuclear fusion reactions. The light from the Sun heats our planet and makes life possible. The Sun is also an act...
 
    Venus, 2nd Planet from the Sun
  Venus, 2nd Planet from the Sun
Venus is the second planet from the Sun and the sixth largest. On June 8 2004, Venus will pass directly between the Earth and the Sun, appearing as a large black dot travelling across the Sun's disk. This event is known as a "transit of Venus" and i...
 
    Uranus, 7th Planet from the Sun
  Uranus, 7th Planet from the Sun
Uranus is the 7th planet from the Sun. It was discovered in 1781 by William Herschel and named for the Greek god personifying heaven. A blue-green gas giant, it has almost 15 times the mass of Earth and over 50 times its volume. It is less dense than...
 
    Neptune, 8th Planet from the Sun
  Neptune, 8th Planet from the Sun
Neptune is the eighth planet from the Sun and the fourth largest (by diameter). Neptune is smaller in diameter but larger in mass than Uranus. In Roman mythology Neptune (Greek: Poseidon) was the god of the Sea. After the discovery of Uranus,...
 
    Mars, 4th Planet from the Sun
  Mars, 4th Planet from the Sun
Mars is the fourth planet from the Sun and the second smallest planet in the Solar System, after Mercury. Named after the Roman god of war, it is often described as the "Red Planet" because the iron oxide prevalent on its surface gives it a reddish a...
 
    Science Timeline
  Science Timeline
History of science timeline for biology, chemistry, physics, geology, mathematics, and philosophy of science...
 
    History and Facts of Calendars
  History and Facts of Calendars
Timeline of interesting calendar facts. Length of the tropical year, defined as the average interval between vernal equinoxes. This calendar year was the objective of the Gregorian calendar reform, which finalized the calendar as we use it today....
 
    A brief history of Opium
  A brief history of Opium
Opium teaches only one thing, which is that aside from physical suffering, there is nothing real: André Malraux. The opium poppy is cultivated in lower Mesopotamia. The Sumerians refer to it as Hul Gil, the 'joy plant.' The Sumerians would soon pass...
 
    Timeline in Optics
  Timeline in Optics
Molecular Expressions: Science, Optics and You: This timeline focuses on events that affected the science of optics from prehistory to present day. microscopy, photomicrography, science, education, optics, light, color...
 
    Imhotep, Architect Pyramid of Djoser
  Imhotep, Architect Pyramid of Djoser
Imhotep (meaning "the one who comes in, with peace") was an Egyptian polymath, who served under the Third Dynasty king, Djoser, as chancellor to the pharaoh and high priest of the sun god Ra at Heliopolis. He is considered to be the first engineer, a...
 
    Hesiod, Greek Poet
  Hesiod, Greek Poet
Hesiod was a Greek oral poet and is often identified as the first economist. His date is uncertain but leading scholars, favor the the eighth century BC for when Hesiod lived. Since at least Herodotus's time, Hesiod and Homer have generally been cons...
 
    Quantum Theory : Particle Physics Timeline
  Quantum Theory : Particle Physics Timeline
For over two thousand years people have thought about the fundamental particles from which all matter is made, starting with the gradual development of atomic theory, followed by a deeper understanding of the quantized atom, leading to the recent the...
 
    Anaximander of Miletus, Philosopher
  Anaximander of Miletus, Philosopher
Anaximander, Ionian philosopher of Miletus, the first Greek known to have written (c.546) a book in prose, a treatise on nature, now lost except for one quotation. It was said that he introduced into Greece the gnomon (the vertical rod whose shadow i...
 
    Anaxagoras, Cause of Eclipses
  Anaxagoras, Cause of Eclipses
Greek philosopher of nature remembered for his cosmology and for his discovery of the true cause of eclipses. He was associated with the Athenian statesman Pericles. About 480 Anaxagoras moved to Athens, then becoming the centre of Greek culture, and...
 
    Empedocles, The 4 Classical Elements
  Empedocles, The 4 Classical Elements
Empedocles was a Greek pre-Socratic philosopher and a citizen of Agrigentum, a Greek city in Sicily. Empedocles' philosophy is best known for being the origin of the cosmogenic theory of the four Classical elements. He also proposed powers called Lo...
 
         
         



 
 
         
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