Clipmarks | NS-Clips's 'astronomy' clips

100 Greatest Discoveries

Thu, 26 Jun 2008 13:58:38 GMT

clipped by: skwirlinator

Scientists have transformed the way we think and live throughout the centuries. What are the most important scientific discoveries of all time? In no particular order, we present the top 100 in eight different categories.

Astronomy
Explore the universe.

Chemistry
Explore the world under a microscopic.

Earth Science
Explore the Earth under your feet.

Physics
Explore how stuff works.

Medicine
Explore developments in health.

Evolution
Explore the past.

Genetics
Explore what makes you, you.

Biology
Explore the world around you.

Clip Source: science.discovery.com

Physics

1. The Law of Falling Bodies (1604)
Galileo Galilei overturns nearly 2,000 years of Aristotelian belief that heavier bodies fall faster than lighter ones by proving that all bodies fall at the same rate.

2. Universal Gravitation (1666)

3. Laws of Motion (1687)

4. The Second Law of Thermodynamics (1824 – 1850)

5. Electromagnetism (1807 – 1873)

6. Special Relativity (1905)

7. E = mc^2 (1905)

8. The Quantum Leap (1900 – 1935)

Tags: 100 greatest discoveries, science

The laws list

Sun, 13 Apr 2008 22:44:16 GMT

clipped by: skwirlinator

Clip Source: www.alcyone.com

The laws list

Laws, rules, principles, effects, paradoxes, limits, constants, experiments, & thought-experiments in physics.

The laws list is a list of various laws, rules, principles, and other related topics in physics and astronomy.

This list is not intended to be complete.

The laws list originally started out strictly as a list of laws. Then, because of their similarity, I began adding rules to the list (after all, in physics, there is generally no difference between a law and a rule). Over time I added more and more similar subjects. Now, the list is more of a minidictionary of physics and astronomy terms, rather than strictly a list of laws, rules, and so forth; however, for historical reasons I still refer to it as the laws list, even though it is something of a misnomer.

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Laws

Tags: science, laws, physics

A Pale blue dot - 1. The Earth from the Voyager - Carl Sagan's speech

Sat, 04 Aug 2007 02:39:55 GMT

clipped by: NS-Clips
clipper's remarks: ON Oct 13, 1994the famous asreonomer Carl Sagan presented this photo zt the University of Cornell.

Clip Source: www.bigskyastroclub.org

Tags: astronomy

A Pale blue dot - The Earth from the Voyager - Carl Sagan's speech

Fri, 03 Aug 2007 15:05:17 GMT

clipped by: NS-Clips
clipper's remarks: The earth is a very small stage in a vast cosmic arena. Think of the rivers of blood spilled by all those generals and emperors so that in glory and in triumph they could become the momentary masters of a fraction of a dot. Think of the endless cruelties visited by the inhabitants of one corner of the dot on scarcely distinguishable inhabitants of some other corner of the dot. How frequent their misunderstandings, how eager they are to kill one another, how fervent their hatreds. Our posturings, our imagined self-importance, the delusion that we have some privileged position in the universe, are challenged by this point of pale light. Our planet is a lonely speck in the great enveloping cosmic dark. In our obscurity -- in all this vastness -- there is no hint that help will come from elsewhere to save us from ourselves. It is up to us. It's been said that astronomy is a humbling, and I might add, a character-building experience. Carl Sagan. More at the site...

Clip Source: www.bigskyastroclub.org

"We succeeded in taking that picture [from deep space], and, if you look at it, you see a dot. That's here. That's home. That's us. On it, everyone you ever heard of, every human being who ever lived, lived out their lives. The aggregate of all our joys and sufferings, thousands of confident religions, ideologies and economic doctrines, every hunter and forager, every hero and coward, every creator and destroyer of civilizations, every king and peasant, every young couple in love, every hopeful child, every mother and father, every inventor and explorer, every teacher of morals, every corrupt politician, every superstar, every supreme leader, every saint and sinner in the history of our species, lived there on a mote of dust, suspended in a sunbeam.

Tags: astronomy, voyayeger, carl sagan

A Pale blue dot - The Earth from the Voyager

Fri, 03 Aug 2007 14:59:21 GMT

clipped by: NS-Clips
clipper's remarks: The photo above was taken by Voyager 1 in 1990 as it sailed away from Earth, more than 4 billion miles in the distance. Having completed it primary mission, Voyager at that time was on its way out of the Solar System, on a trajectory of approximately 32 degrees above the plane of the Solar System. Ground Control issued a command for the distant space craft to turn around and, looking back, take photos of each of the planets it had visited. From Voyager's vast distance, the Earth was captured as a infinitesimal point of light (between the two white tick marks), actually smaller than a single pixel of the photo. The image was taken with a narrow angle camera lens, with the Sun quite close to the field of view. Quite by accident, the Earth was captured in one of the scattered light rays caused by taking the image at an angle so close to the Sun. Dr. Sagan was quite moved by this image of our tiny world. Here is an enlargement of the area around our Pale Blue Dot

Clip Source: www.bigskyastroclub.org

Tags: astronomy, voayager, earth, carl sagan