Observing the Solar System Section 20.1 Early Observations Greek Observations Saw star patterns in the sky travel together (Constellations)
Early Observations Some stars seemed to wander (planets) They were later named by the Romans (Mercury, Venus, Mars, Jupiter, Saturn) Early Observations
Most Greek astronomers believed that Earth was in the center of a celestial sphere. (geocentric system) Early Observations Claudius Ptolemy Earth in center
Planets move on small circle that move on bigger circles Widely accepted for 1500 years Early Observations
Nicholas Copernicus Believed in a sun centered system (Heliocentric) Mikolaj Kopernik Said the planets moved around the sun in circles in
1543 Early Observations Nicholas Copernicus Was banned by the Catholic church Mikolaj Kopernik
Galileo Used the telescope to support him (Venus phases, Jupiters moons) Was placed under house arrest
Galileo Early Observations Tycho Brahe Made accurate observation for over 20 years
Early Observations Johannes Kepler Analyzed Brahes observations and found that the path of the orbits were ellipses
Keplers 1st Law Early Observations Johannes Kepler He found that the speed of orbiting planets is constantly changing Keplers 2nd Law
Early Observations Johannes Kepler When he compared planets, he found a relationship between how far from the sun they
were and the time to make one orbit Keplers 3rd Law Early Observations Today we know of 8 planets (MVEMJSUN) their moons, and smaller objects that
revolve around the sun What about Pluto? According to the new definition, a full-fledged planet is an object that orbits the sun and is large enough to have become round due to the force of its own gravity. In addition, a planet has to dominate the neighborhood
around its orbit. Pluto does not dominate its neighborhood Charon is half it size It does not sweep up its neighborhood, there is much debris in its orbit
Scopeof the study. Facts. Increasing . number of . acquisitions/sales. of space industries of . 2. nd. and 3. rd. tiers (ex. sale of Airbus Group Electronic Defense division to the US investment fund KKR, following a beauty contest where...
Enzyme inhibition (EI) - the definition. It is an interaction B/W a molecule and enzyme that blocks the catalytic action of the enzyme in a normal way. Enzyme . inhibito. r is a substance that . slows down /stops ....
Axosomatic. synapses (a) Electrical Synapses. Less common than chemical synapses. Neurons are electrically coupled (joined by gap junctions) Communication is very rapid, and may be unidirectional or bidirectional. Are important in: Embryonic nervous tissue.
We generalise groups to roles and consider role-based access control (RBAC) Access Control * Role-based access control (RBAC) Services may classify their clients into named roles e.g. login service: logged-in-user (after authentication) patient monitoring service: surgeon, doctor, nurse, patient online...
A flaccid cell is placed in the above beaker with a solute potential of -0.3 bars. a) What is the pressure potential of the flaccid cell before it was placed in the beaker? p = 0 bars since the cell...
Prepare Management Reports Traditional Cost Accounting System Predetermined manufacturing overhead rate $1,000,000 20,000 MH = $50/MH = 400 units x 0.5 MH/unit x $50/MH = $10,000 * * Direct Materials Direct Labor Mfg. Overhead Work-in- Process Finished Goods Cost-of Goods...
Intelligent Agents An agent is a device that responds to stimuli from its environment. An agent could be a robot, an autonomous plane, a character in a video game, or a program commuting over the Internet. The goal of Artificial...
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