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Timeline |
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BIG BANG : Formation of the Universe |
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BIG BANG : Formation of the Universe > Website 
Ca. 13.7 billion years ago: Universe, which includes time and space, begins with Big Bang. The Big Bang is dated according to NASA. 300 thousand years after the Big Bang, hydrogen nuclei capture electrons, forming the first atoms. 600 million years after the Big Bang: formation of first galaxies, see Galaxy formation and evolution. 5 billion years ago: formation of the Sun. 4.5 billion years ago: formation of the Earth.
More on this Website >
• http://www.windows.ucar.edu/to ... se/uts/timeline.html
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Univers
The Universe today is very different from the Universe of the past and of the future. However, we can discover much about the past and the future from what we can currently observe. The Universe today is filled with structure and behavior that is bot... |
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The Nine Planets
The Nine Planets is an overview of the history, mythology, and current scientific knowledge of each planet and the major moons in our solar system. Each page has my text and NASA's images, some have sounds and movies, most provide references to addit... |
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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... |
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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,... |
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FORMATION OF EARTH
4600 MYA Formation of the approximately homogeneous solid Earth by planetesimal accretion. 3800 MYA The Earth's crust solidifies--formation of the oldest rocks found on Earth. 3500 MYA Prokaryotic cell organisms develop. Beginning of photosynthesis b... |
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Earth
The continents are the great land masses of the earth. There are seven continent on Earth now: Africa, Antarctica, Asia, Australia, Europe, North America, and South America. A long time ago, all of the earth's continents were squished together - one... |
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Copernicus, Earth moves around the Sun
Nicolaus Copernicus was the first astronomer to formulate a comprehensive heliocentric cosmology, which displaced the Earth from the center of the universe. His epochal book, De revolutionibus orbium coelestium (On the Revolutions of the Celestial Sp... |
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Galileo Galilei, Father of Modern Science
Galileo Galilei was an Italian physicist, mathematician, astronomer, and philosopher who played a major role in the Scientific Revolution. His achievements include improvements to the telescope and consequent astronomical observations, and support fo... |
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Isaac Newton, Theory of Gravitation
Newton laid the foundation for differential and integral calculus. His work on optics and gravitation make him one of the greatest scientists the world has known. Newton's greatest achievement was his work in physics and celestial mechanics, which cu... |
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Herschel, Discovered Uranus - 1781
Sir Frederick William Herschel, FRS KH, German Friedrich Wilhelm Herschel, (15 November 1738 – 25 August 1822) was a German-born British astronomer and composer who became famous for discovering Uranus. He also discovered infrared radiation and made... |
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Albert Einstein, Relativity Theory - 1905
Einstein's contributions to physics began in 1905 with three major results: the explanation of Brownian motion in terms of molecules; the explanation of the photoelectric effect in terms of the quantum; and the special theory of relativity that links... |
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Edwin Hubble, Big Bang Theory
Hubble had also devised a classification system for the various galaxies he observed, sorting them by content, distance, shape, and brightness; it was then he noticed redshifts in the emission of light from the galaxies, seeing saw that they were... |
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Gerard Kuiper, Astronomer
Kuiper is considered to be the father of modern planetary science for his wide ranging studies of the solar system. Although he contributed to astrophysics, established the atmosphere of Saturn's moon Titan, and discovered Saturn's moon Miranda and N... |
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Who • What • When • Where • Which |
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