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Level 4
Level 4

...  Explain Earth’s revolution around the Sun and rotation on its axis.  Differentiate between rotation and revolution.  Describe the observable changes in the shape of the moon over a month’s time.  Describe why constellations appear to shift across the night sky.  Explain why different stars can ...
The Planets in our Solar System
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... The Birth of the Sun • The sun formed from the dense concentration of gas at the center of the solar nebula. • As the gas and dust condensed, the temperature and pressure at the center increased. • The temperature and pressure became so great, nuclear fusion began. ...
Diapositiva 1 - Yale University
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... 3. What is the study of the universe called? __________________________. 4. A person who studies astronomy is called an ______________________________. 5. The sun along with the planets is known as the ___________________ ____________________. 6. A hot ball of plasma is known as a __________________ ...
Science and Reality (as of 2014)
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... • Space is an empty (devoid of all matter) container in which objects are put. Space is Absolute and no motion. Same everywhere and does not change with time, Isotropic, homogeneous and threedimensional. • Time: The concept comes from succession of events; is continuous and moves in the forward dire ...
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... C class: they have a dark appearance, implying a composition of rocky material mixed with dark carbon compounds. This class is thought to consist of primitive matter. S class: this is a rather small group –compared with the C ones. They are more reflective and show a preponderance of silicate rock. ...
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Big Bang Theory
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...  are balls of gas that produce their own energy by the process of NUCLEAR FUSION; they are the major features of galaxies – diameter of the sun (an average star) = 870,000 miles (1,392,000 km.) – That’s over 100,000 times the diameter of the Earth. Over 1,000,000 Earths could fit inside of the Sun ...
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... The planets would move in a straight line, as opposed to an elliptical path around the Sun, without the Sun’s gravitational pull. ...
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... has beamed back close-up photographs of asteroid Lutetia, an ancient, cratered relic from the dawn of the solar system. Scientists are abuzz about the stunning images, which reveal a worldlet of haunting, alien beauty. Asteroid Lutetia has been a target of interest among astronomers for many years. ...
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... they have a small surface area but a large mass, which causes high temperature. Looking at the H/ R diagram you can tell that white dwarfs are not very bright (10 – 10, 000 x dimmer than our sun) and they are of spectral type O, B, A, F. So white dwarfs are smaller, more dense, and much dimmer than ...
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... • The surface and atmosphere of the Sun are extremely active • Solar wind streams out of coronal holes, regions of low magnetic field • Active regions send arcades of plasma shooting from the surface. These are regions of high magnetic field • Coronal mass ejections send large quantities of mass out ...
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... 13.It takes Mars longer than Earth to orbit around the Sun. _________________________ 14.The moon is brightest when it is in its first quarter phase. _________________________ 15.The neap tides occur during the new and full moon phases. _________________________ 16.Light from a source moving toward ...
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... We Do : Investigate the constellations in small groups. You Do: Exchange information learned. What if there was no Sun? What would happen if the Sun ceased to exist? ...
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Outer space



Outer space, or just space, is the void that exists between celestial bodies, including the Earth. It is not completely empty, but consists of a hard vacuum containing a low density of particles, predominantly a plasma of hydrogen and helium as well as electromagnetic radiation, magnetic fields, neutrinos, dust and cosmic rays. The baseline temperature, as set by the background radiation from the Big Bang, is 2.7 kelvin (K). Plasma with a number density of less than one hydrogen atom per cubic metre and a temperature of millions of kelvin in the space between galaxies accounts for most of the baryonic (ordinary) matter in outer space; local concentrations have condensed into stars and galaxies. In most galaxies, observations provide evidence that 90% of the mass is in an unknown form, called dark matter, which interacts with other matter through gravitational but not electromagnetic forces. Data indicates that the majority of the mass-energy in the observable Universe is a poorly understood vacuum energy of space which astronomers label dark energy. Intergalactic space takes up most of the volume of the Universe, but even galaxies and star systems consist almost entirely of empty space.There is no firm boundary where space begins. However the Kármán line, at an altitude of 100 km (62 mi) above sea level, is conventionally used as the start of outer space in space treaties and for aerospace records keeping. The framework for international space law was established by the Outer Space Treaty, which was passed by the United Nations in 1967. This treaty precludes any claims of national sovereignty and permits all states to freely explore outer space. Despite the drafting of UN resolutions for the peaceful uses of outer space, anti-satellite weapons have been tested in Earth orbit.Humans began the physical exploration of space during the 20th century with the advent of high-altitude balloon flights, followed by manned rocket launches. Earth orbit was first achieved by Yuri Gagarin of the Soviet Union in 1961 and unmanned spacecraft have since reached all of the known planets in the Solar System. Due to the high cost of getting into space, manned spaceflight has been limited to low Earth orbit and the Moon.Outer space represents a challenging environment for human exploration because of the dual hazards of vacuum and radiation. Microgravity also has a negative effect on human physiology that causes both muscle atrophy and bone loss. In addition to these health and environmental issues, the economic cost of putting objects, including humans, into space is high.
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