Sci 3- ASTRONOMY DWARF PLANETS POSSIBLE DWARF PLANETS Sedna- discovered on November 14‚ 2003 2007OR10-discovered on July 17‚ 2007 Quaoar-discovered on June 5‚ 2002 Orcus-discovered on February 17‚ 2004 Official dwarf planets 1. Ceres – discovered on January 1‚ 1801 (45 years before Neptune)‚ 2. Pluto – discovered on February 18‚ 1930‚. 3. Haumea – discovered on December 28‚ 2004. 4. Eris – discovered on January 5‚ 2005. 5. Makemake – discovered on March 31‚ 2005. ERIS Is the largest known dwarf
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Early trigonometry The ancient Egyptians and Babylonians had known of theorems on the ratios of the sides of similar triangles for many centuries. But pre-Hellenic societies lacked the concept of an angle measure and consequently‚ the sides of triangles were studied instead‚ a field that would be better called "trilaterometry".[6]The Babylonian astronomers kept detailed records on the rising and setting of stars‚ the motion of the planets‚ and the solar and lunar eclipses‚ all of which required
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Earth’s revolution around the Sun‚ the solar day is a few minutes longer than the sidereal day. The Sun’s yearly path around the celestial sphere‚ or‚ equivalently‚ the plane of Earth’s orbit around the Sun‚ is called the ecliptic. Because Earth’s axis is inclined to the ecliptic plane‚ we experienceseasons‚ depending on which hemisphere (Northern or Southern) happens to be "tipped" toward the Sun. At the summer solstice‚ the Sun is highest in the sky‚ and the length of the day is greatest. At the winter
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CHAPTER 6 Air-Sea Interaction Earth’s Seasons Earth’s axis of rotation is tilted ______° with respect to ecliptic. Ecliptic – plane traced by Earth’s __________ ___________ Axis always points in the same _________‚ ___________ (_____________) Seasonal changes and Earth’s rotation cause ___________ solar heating of Earth’s surface. Tilt responsible for seasons Vernal (spring) equinox - _March______ Sun is directly overhead along the __________ Summer solstice - _______________ Sun is
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Hipparchian and Ptolemaic systems‚ the planets are assumed to move in a small circle called an epicycle‚ which in turn moves along a larger circle called a deferent. Both circles rotate clockwise and are roughly parallel to the plane of the Sun’s orbit (ecliptic). Despite the fact that the system is considered geocentric‚ the planets’ motion was not centered on the Earth but on what is called the eccentric. The orbits of planets in this system are epitrochoids. The epicycle rotated and revolved along the
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Being asked most people would name the twelve constellations of the zodiac and some more they have heard of or even seen (most common is surely the Big Dipper‚ though it is not a constellation but an asterism). In total there are 88 constellations‚ which can be divided into eight constellation families (see Menzel‚ "A Field Guide to the Stars and Planetes"). Many names we use nowadays came from the ancient Greeks. They used to assign their gods and heroes to certain figures in the sky. Due to their
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and an observatory. This was the most ambitious undertaking of its kind since the foundation of the Alexandrian Museum (q. v. first half of third century B. C.). He built another observatory on the plain of Tadmor (Palmyra). The inclination of the ecliptic was found by his astronomers to equal 23o 33 ’ and tables of the planetary motions were constructed. He ordered two degree-measurements to be made to determine the size of the earth one of them near Tadmor (a degree = 6‚500 miles) hence circumference
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Earth to the Sun Centrifugal force - the tendency of rotating object to flee from the center of their rotation Obliquity - tilt of a planet’s axis Ecliptic - a plane in space defined by Earth’s orbit around the Sun; plane by which the orbit of all other planets in the solar system are compared Inclination - angle between plane of orbit and ecliptic plane Transit - passing of object in front of star‚ transit of planets can only occur on line of nodes; transit of Venus will occur next year and will
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the time. Sun: But they obviously gave some considerance to the Sun. They not only noted down equinoxes and solstices but Zenial passages as well. They also had a god who symbolized the Sun during a Zenial passage called the Diving God. And the Ecliptic‚ the path the Sun follows in the sky‚ was depicted by a double-headed serpent. Also‚ to signal the changing of season‚ a ball game was played that re-enacted the Sun’s orbit around the Earth. Earth: The Earth was believed to be
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following best describes the origin of ocean tides on Earth? | | | | | | | | The Moon’s gravity pulls harder on water than on land‚ because water is less dense than rock. | | | Tides are caused by the 23 1/2° tilt of the earth’s rotational axis to the ecliptic plane. | | | Tides are caused primarily by the gravitational force of the Sun. | | | Tides are caused by the difference in the force of gravity exerted by the Moon across the sphere of the earth. | | | Tides are caused on the side of
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