The Nature of Things in the Solar System Why does the sky look the way it does? The existence of the ecliptic
The Earth and the other planets orbit the Sun, in nearly the same plane for all planets The inner solar system 3 months from now
February 3 May 3 Why we see the Sun projected against different constellations at different times
of the year Then, why is the ecliptic tilted with respect to the celestial equator (the reason for seasons) Answer: the obliquity of the
ecliptic (or more simply obliquity, or even more simply, tilt of the Earths axis) The obliquity of the ecliptic and the seasons
Northern hemisphere in summer Northern hemisphere
in winter The obliquity of the ecliptic and habitability of the Earth The obliquity is 23.5 degrees, and changes over time by about +/- 1.5 degrees
This is a mild variation, and allows moderate, but not extreme seasonal variations. It is conjectured that this modest variation is a consequence of the Earth having a relatively large moon, which may be a low-probability event.
Eclipses: observational properties A lunar eclipse (eclipse of the Moon) Progress of a lunar eclipse
Whats going on? Big mystery for the ancients A solar eclipse: one of the great spectacles of
nature What is going on? More pictures: Fig 9.5- 9.8
Eclipses caused by shadows of one solar system object on another Solar eclipses and lunar eclipses Solar eclipses are rare, lunar eclipses
relatively common The Earth is a large object and casts a big shadow that covers a lot of space The Moon is a small object and casts a small shadow. It is much less likely to hit a given place on Earth.
Lunar eclipses: dark ones and bright ones Why dont eclipses occur every month? 5 degrees makes a difference
Eclipses for 2010 January 15 --- annular eclipse of Sun--Indian Ocean June 26 --- partial lunar eclipse --around 5-6 AM around moonset July 11--- eclipse of the Sun ---China and
western Pacific December 21--- total lunar eclipse--maximum eclipse around 3 AM Iowa time
The Body's Physical Systems Health Psych Dr. Alan H. Teich The Neuron Neural Communication Neural Communication CNS: Forebrain Diencephalon Thalamus & Hypothalamus Telencephalon Limbic System Cerebrum The Limbic System Brain stem The Cerebral Cortex The Nervous System Sympathetic Nervous system...
Three days later, the last bomb in our arsenal was dropped on Nagasaki (due to bad weather over Nagoya, the original target.) V-J Day. On September 2, 1945 the Empire of Japan officially surrendered to General Douglas MacArthur on board...
Water Evaporation Condensation Precipitation Transpiration Source of Energy Evaporation The vapor rises Condensation The Clouds form Precipitation The rain falls Transpiration The movement through plants Ground Water One atom of oxygen Two atoms of hydrogen o + H H -...
Long term, local Hebbian learning ... Extremely small, sub micron dimensions for a synapse. Enormous amounts of memory, computation and circuitry. Digital solution uses multiple bits of memory to store each synaptic weight and synaptic state.
The Hartree Centre The Hartree Centre The Hartree Centre, based at STFC's Daresbury Laboratory, was founded in 2012 principally to stimulate the uptake of HPC and to support UK industry. We are working with a number of high profile partners,...
Examine the cost of course materials (including textbooks) for UNM students to ensure student success. ... that provide materials to all enrolled students on or before the first day of class with automated billing to student bursar accounts.
Another example - TWA 1967 sizable profits, but in 1968, TWA was headed for a major financial loss. TWA's managers extended the depreciable life of most assets, reducing the depreciation expense and consequently improving the fiscal bottom line. Why? Management...
Ready to download the document? Go ahead and hit continue!