The universe
BY DHRUV
BIRTH OF THE UNIVERSE
Basically, when there was nothing. The universe was so small that it could fit in a person fist. But it contained all the matter, and energy in the universe today. It was all stuffed in. It had always tryed explode, pushing it out with all the forces, the pressure, the strees and strain. Once apon at time(in one second), there was the biggest explosion one can ever imagine. People know it as "THE BIG BANG". It had brought our solar system, our stars, galaxies, black holes etc.. The universe is about17.5 million years old. We know that the universe is getting bigger.
Birth of a star
A star is a gigantic glowing balls of gas scattered all over the universe. How is a star born? Stars are born when clumps of gas in space are drawn together by their own gravity, and the middle of the clump is squeezed so hard that tempratures reach 10 million celsius, so nuclear fusion reaction starts.
components of
solar system
Asteroid belt
asteroids
celestial body
Galilien moons
Lo, Calisto, Europa, Calisto
comets
inner planets
Mercury, Venus, Earth, Mars
small, rocky, terrestrial (solid/made of land)
orbits
outer planets
Jupiter, Saturn, Uranus, Neptune
Big and made of Gas
time
year, rotation, day, revolution
Natural setillite
moon
planets
comets
asteroids
solar sytstem
moon
meteor
Meteoroid
Meteorite
sun
Existence of black hole
Astronomers have found convinsing evidence for a suppermassive blackhole in the cener of our own milky way galaxy, the galaxy NGC 4258, the giant elliptical galaxy M87, and several others. Scientists verified the existence of the black holes by studying the speed of the clouds of gas orbiting those regions. In 1994, Hubble Space Telescope data measured the mass of an unseen object at the center of M87. Based on the motion of the material whirling about the center, the object is estimated to be about 3 billion times the mass of our Sun and appears to be concentrated into a space smaller than our solar system.
scientific revolution
The Scientific Revolution was a time (1550-1700) during the Middle Ages when many discoveries were dicovered. During this time, new ideas and discoveries fundamentally changed the way people thought; they also forced people to think differently, and started what is called modern science today.
5 astrophysicist's contribution
1. giordiano bruno
Giordano Bruno was an Italian scientist, Bruno (1548-1600) published three works--The Ash-Wednesday Supper, On Cause, Principle, and Unity, and "On the Infinite Universe and its Worlds"--in which he told about his philosophy that the universe was of infinite size, and that the Earth, sun, and planets were all moving constantly within it, and were by no means located at its center.
2. nicolas copercinus
Copercinus was an avid student of astronomy, and in 1543 he published "De Revolutionibus Orbium Coelestium. In this trietise, he presented the heliocentric theory, which rested on revolutionary notion that the earth orbited the sun.
3. galileo galilei
Galileo (1564-1642) was the most successful scientist of the Scientific Revolution, save only Isaac Newton. He studied physics, specifically the laws of gravity and motion, and invented the telescope and microscope. Galileo eventually combined his laws of physics with the observations he made with his telescope to defend the heliocentric Copernican view of the universe and refute the Aristotelian system in his 1630 masterwork.
4. issac newton
Perhaps the most influential scientist of all time, Newton (1642-1727) took the current theories on astronomy a step further and formulated an accurate comprehensive model of the workings of the universe based on the law of universal gravitation. Newton explained his theories in the 1687 revolutionary work "Philosophia Naturalis Principia Mathematica", often called simply the "Principia". This work also went along way toward developing calculus.
5. Albert einstein
albert einstien was a german born scientist who published his theory of photoelectric rays, theory of relativity in which he also speaks about gravitational forces. he also discovered the big bang theory which talks about the birth of the universe.
Did you know...
- When you look into the night sky, you are looking back in time
- The Hubble telescope allows us to look back billions of years into the past
- You can watch the Big Bang on your television
- It takes 225 million years for our Sun to travel round the galaxy
- We are all made of stardust
- Uranus spins on its side, with some rather strange results
- Neutron stars are the fastest spinning objects known in the universe
- A spoonful of a neutron star weighs about a billion ton
- There could be 500 million planets capable of supporting life in our galaxy
- The human brain is the most complex object in the known universe
- Uranus spins on its side, with some rather strange results
- Neutron stars are the fastest spinning objects known in the universe
- A spoonful of a neutron star weighs about a billion ton
- There could be 500 million planets capable of supporting life in our galaxy
- The human brain is the most complex object in the known universe
References
1. http://quizlet.com/
2. http://www.sparknotes.com/
3. http://simple.wikipedia.org/
4. http://hubblesite.org/
5. http://images.google.com/
6. My mind
The Universe Project
By Dhruv Shrivastava
