Lecture 1a: Class overview and Early Observations 8/27
... • Day becomes .002 seconds longer each century • Moon receding from the Earth by 4 cm each year 500,000,000 years ago there were 22 hours in a day 400 days in a year Billions of years in the future there will be 1 “day” = 47 present days 1 “month” = 1 “day” Earth-Moon frozen with no additional spi ...
... • Day becomes .002 seconds longer each century • Moon receding from the Earth by 4 cm each year 500,000,000 years ago there were 22 hours in a day 400 days in a year Billions of years in the future there will be 1 “day” = 47 present days 1 “month” = 1 “day” Earth-Moon frozen with no additional spi ...
4 Kepler`s Laws - NMSU Astronomy
... Throughout human history, the motion of the planets in the sky was a mystery: why did some planets move quickly across the sky, while other planets moved very slowly? Even two thousand years ago it was apparent that the motion of the planets was very complex. For example, Mercury and Venus never str ...
... Throughout human history, the motion of the planets in the sky was a mystery: why did some planets move quickly across the sky, while other planets moved very slowly? Even two thousand years ago it was apparent that the motion of the planets was very complex. For example, Mercury and Venus never str ...
chapter01lecturecdl
... – The Sun, Moon, planets, and stars appear to rise in the east, cross the meridian due south, and set toward the west. – Celestial objects are said to transit when the cross the celestial meridian in the southern sky. • This is when they are highest in the sky. ...
... – The Sun, Moon, planets, and stars appear to rise in the east, cross the meridian due south, and set toward the west. – Celestial objects are said to transit when the cross the celestial meridian in the southern sky. • This is when they are highest in the sky. ...
Extrasolar Planetary Systems » American Scientist
... for what might be a planet orbiting an obscure star known as HD 114762. Because Latham's planet has at least 10 times the mass of Jupiter, astronomers tended to assume that it was either a brown dwarf or a star of very low mass. So it, too, didn't make headlines. In 1992, Alexander Wolsczan of Penn ...
... for what might be a planet orbiting an obscure star known as HD 114762. Because Latham's planet has at least 10 times the mass of Jupiter, astronomers tended to assume that it was either a brown dwarf or a star of very low mass. So it, too, didn't make headlines. In 1992, Alexander Wolsczan of Penn ...
Eratosthenes - robertnowlan.com - A Chronicle of Mathematical
... Posidonius used the star Canopus as his light source and the cities of Alexandria and Rhodes as his points of reference on earth. Unfortunately, he miscalculated the distance between Alexandria and Rhodes, resulting in an estimation of the circumference of the Earth that was much too small. Ptolemy ...
... Posidonius used the star Canopus as his light source and the cities of Alexandria and Rhodes as his points of reference on earth. Unfortunately, he miscalculated the distance between Alexandria and Rhodes, resulting in an estimation of the circumference of the Earth that was much too small. Ptolemy ...
Relative Speed of the Planets: UAC 2008
... Sidereal period: "the time it takes a celestial body to make one complete round in its orbit, measured by its recurrent alignment to a star." Synodic period: "the time it takes a celestial body to make one complete round in its orbit, measured from one conjunction to the Sun to the next." Both defin ...
... Sidereal period: "the time it takes a celestial body to make one complete round in its orbit, measured by its recurrent alignment to a star." Synodic period: "the time it takes a celestial body to make one complete round in its orbit, measured from one conjunction to the Sun to the next." Both defin ...
The solar system
... So the solar system is not simple at all. The difficulties are numerous: - the number of interacting bodies is both big and unclearly defined. Even if asteroids are unknown and all the planets not yet discovered, how many are involved? - initial conditions are unclear. However, the problem is not ho ...
... So the solar system is not simple at all. The difficulties are numerous: - the number of interacting bodies is both big and unclearly defined. Even if asteroids are unknown and all the planets not yet discovered, how many are involved? - initial conditions are unclear. However, the problem is not ho ...
Notes (PowerPoint)
... • Normally counter-clockwise from above north pole • All planets exhibited this sometimes • Plato’s theory had extra spheres and features to handle retrograde motion ...
... • Normally counter-clockwise from above north pole • All planets exhibited this sometimes • Plato’s theory had extra spheres and features to handle retrograde motion ...
Water ice lines around super-Jovian planets and Implications for
... coming from the M – R diagram on the extent of orbital migration. Efficient inward migration brings ice-dominated, low-density planets from the outer parts of the disk close to the star. These planets can be distinguished from planets consisting only of silicates and iron, which have presumably form ...
... coming from the M – R diagram on the extent of orbital migration. Efficient inward migration brings ice-dominated, low-density planets from the outer parts of the disk close to the star. These planets can be distinguished from planets consisting only of silicates and iron, which have presumably form ...
26.9 news and views feature mx
... massive than the Earth, but subsequent observations showed that it is less than 5% of the mass of Mercury, the smallest of the planets known before 1800 and itself less than 6% of the mass of the Earth. This realization, together with the discovery of many minor planets beyond Neptune during the pas ...
... massive than the Earth, but subsequent observations showed that it is less than 5% of the mass of Mercury, the smallest of the planets known before 1800 and itself less than 6% of the mass of the Earth. This realization, together with the discovery of many minor planets beyond Neptune during the pas ...
Notes for Class 5, February 16
... • Hellenistic Period (after 323 BC) o Ptolemy (2nd cent AD) used new tools to simplify geocentric model of heavens • Epicycle (small sphere moved on larger sphere, planet on small sphere) • Eccentrics (circle displaced from earth) • Equant – point from which planet appeared to move at constant speed ...
... • Hellenistic Period (after 323 BC) o Ptolemy (2nd cent AD) used new tools to simplify geocentric model of heavens • Epicycle (small sphere moved on larger sphere, planet on small sphere) • Eccentrics (circle displaced from earth) • Equant – point from which planet appeared to move at constant speed ...
Atoms and Stars IST 3360 and IST 1990
... • Hellenistic Period (after 323 BC) o Ptolemy (2nd cent AD) used new tools to simplify geocentric model of heavens • Epicycle (small sphere moved on larger sphere, planet on small sphere) • Eccentrics (circle displaced from earth) • Equant – point from which planet appeared to move at constant speed ...
... • Hellenistic Period (after 323 BC) o Ptolemy (2nd cent AD) used new tools to simplify geocentric model of heavens • Epicycle (small sphere moved on larger sphere, planet on small sphere) • Eccentrics (circle displaced from earth) • Equant – point from which planet appeared to move at constant speed ...
Introduction: - TrevorMander.com
... The (full) moon only has a small chance of going into the shadow of the earth (a lunar eclipse) because it is so far away. Problem: How far would the moon be from the Earth if the Earth was only 0.3m in diameter? Average mean distance to moon = 384,400km, Earth diameter = 12,756km Answer: about 9 me ...
... The (full) moon only has a small chance of going into the shadow of the earth (a lunar eclipse) because it is so far away. Problem: How far would the moon be from the Earth if the Earth was only 0.3m in diameter? Average mean distance to moon = 384,400km, Earth diameter = 12,756km Answer: about 9 me ...
pompton lakes high school - Pompton Lakes School District
... Unit 1 – Our Place in the Universe Standard: 5.1 Science Practices: All students will understand that science is both a body of knowledge and an evidence-based, model-building enterprise that continually extends, refines, and revises knowledge. The four Science Practices strands encompass the knowle ...
... Unit 1 – Our Place in the Universe Standard: 5.1 Science Practices: All students will understand that science is both a body of knowledge and an evidence-based, model-building enterprise that continually extends, refines, and revises knowledge. The four Science Practices strands encompass the knowle ...
Eppur Si Muove – Stellar Parallax?
... 2. Planets moved faster when closer to the Sun in a way that a line between the Sun and planet swept out equal area in equal time. 3. The orbital period of a planet was related to its average distance from the Sun. P2=a3 ...
... 2. Planets moved faster when closer to the Sun in a way that a line between the Sun and planet swept out equal area in equal time. 3. The orbital period of a planet was related to its average distance from the Sun. P2=a3 ...
pompton lakes high school - Pompton Lakes School District
... Unit 1 – Our Place in the Universe Standard: 5.1 Science Practices: All students will understand that science is both a body of knowledge and an evidence-based, model-building enterprise that continually extends, refines, and revises knowledge. The four Science Practices strands encompass the knowle ...
... Unit 1 – Our Place in the Universe Standard: 5.1 Science Practices: All students will understand that science is both a body of knowledge and an evidence-based, model-building enterprise that continually extends, refines, and revises knowledge. The four Science Practices strands encompass the knowle ...
Study Guide for 1ST Astronomy Exam
... Describe the characteristics of the inferior and superior planets as regards their apparent motion in the sky. (Motion, elongation, configuration while retrograde…) Work with and identify planetary configurations of opposition, conjunction and maximum elongation. o Practice with the Planetary Co ...
... Describe the characteristics of the inferior and superior planets as regards their apparent motion in the sky. (Motion, elongation, configuration while retrograde…) Work with and identify planetary configurations of opposition, conjunction and maximum elongation. o Practice with the Planetary Co ...
The Celestial Sphere - University of North Texas
... – The Sun, Moon, planets, and stars appear to rise in the east, cross the meridian due south, and set toward the west. – Celestial objects are said to transit when the cross the celestial meridian in the southern sky. • This is when they are highest in the sky. ...
... – The Sun, Moon, planets, and stars appear to rise in the east, cross the meridian due south, and set toward the west. – Celestial objects are said to transit when the cross the celestial meridian in the southern sky. • This is when they are highest in the sky. ...
origin of the solar system - Breakthrough Science Society
... be worth mentioning that true scientific investigation of the origin of the solar system could begin only after Newton. During the middle age, even asking this question was unthinkable because everything was thought to be created by God, the Supreme Creator. In astronomy, the Church-approved Ptolemi ...
... be worth mentioning that true scientific investigation of the origin of the solar system could begin only after Newton. During the middle age, even asking this question was unthinkable because everything was thought to be created by God, the Supreme Creator. In astronomy, the Church-approved Ptolemi ...
relative size and distance
... • Based on the Earth's orbit around the Sun. • Ecliptic is the plane of the Earth's orbit projected on to the celestial sphere. – The 12 zodiac constellations are located in a band following the ecliptic. – The Sun, Moon, and planets are found on or near the ecliptic. – The ecliptic is tilted 23.5o ...
... • Based on the Earth's orbit around the Sun. • Ecliptic is the plane of the Earth's orbit projected on to the celestial sphere. – The 12 zodiac constellations are located in a band following the ecliptic. – The Sun, Moon, and planets are found on or near the ecliptic. – The ecliptic is tilted 23.5o ...
CH03.AST1001.F16.EDS
... • The Muslim world preserved and enhanced the knowledge they received from the Greeks while Europe was in its Dark Ages. • Al-Mamun's House of Wisdom in Baghdad was a great center of learning around A.D. 800. • With the fall of Constantinople (Istanbul) in 1453, Eastern scholars headed west to Europ ...
... • The Muslim world preserved and enhanced the knowledge they received from the Greeks while Europe was in its Dark Ages. • Al-Mamun's House of Wisdom in Baghdad was a great center of learning around A.D. 800. • With the fall of Constantinople (Istanbul) in 1453, Eastern scholars headed west to Europ ...
Chapter 3: The Science of Astronomy 3.1 The Ancient Roots of
... • The Muslim world preserved and enhanced the knowledge they received from the Greeks while Europe was in its Dark Ages. • Al-Mamun's House of Wisdom in Baghdad was a great center of learning around A.D. 800. • With the fall of Constantinople (Istanbul) in 1453, Eastern scholars headed west to Eu ...
... • The Muslim world preserved and enhanced the knowledge they received from the Greeks while Europe was in its Dark Ages. • Al-Mamun's House of Wisdom in Baghdad was a great center of learning around A.D. 800. • With the fall of Constantinople (Istanbul) in 1453, Eastern scholars headed west to Eu ...
Coordinates - Naval Postgraduate School
... nutation. These are smooth and predictable. But there are smaller, unpredictable motions. These are called the polar motion. The polar motion has an irregular circular motion with a period of about 1.3 years. If one takes the average of these revolutions, then it is clear that even that center locat ...
... nutation. These are smooth and predictable. But there are smaller, unpredictable motions. These are called the polar motion. The polar motion has an irregular circular motion with a period of about 1.3 years. If one takes the average of these revolutions, then it is clear that even that center locat ...
Seasons Challenge
... •The main influence is the length of atmosphere in which the Sun's rays must travel through to get to the atmosphere • During the equinox at noon, on the Equator, the Sun is directly overhead and the its rays hit the Earth at a sharper angle and does not have to travel as far through the atmosphere ...
... •The main influence is the length of atmosphere in which the Sun's rays must travel through to get to the atmosphere • During the equinox at noon, on the Equator, the Sun is directly overhead and the its rays hit the Earth at a sharper angle and does not have to travel as far through the atmosphere ...
Lesson 3: The Motion of the Moon, Sun, and Stars— Motivating
... the Greeks traded goods and knowledge with ancient India. It was in ancient India that new mathematics was developed to describe these celestial observations. The work of the astronomer-mathematician Aryabhata I, born in 476 C.E., is of particular interest to our discussion. ...
... the Greeks traded goods and knowledge with ancient India. It was in ancient India that new mathematics was developed to describe these celestial observations. The work of the astronomer-mathematician Aryabhata I, born in 476 C.E., is of particular interest to our discussion. ...
Copernican heliocentrism
Copernican heliocentrism is the name given to the astronomical model developed by Nicolaus Copernicus and published in 1543. It positioned the Sun near the center of the Universe, motionless, with Earth and the other planets rotating around it in circular paths modified by epicycles and at uniform speeds. The Copernican model departed from the Ptolemaic system that prevailed in Western culture for centuries, placing Earth at the center of the Universe, and is often regarded as the launching point to modern astronomy and the Scientific Revolution.Copernicus was aware that the ancient Greek Aristarchus had already proposed a heliocentric theory, and cited him as a proponent of it in a reference that was deleted before publication, but there is no evidence that Copernicus had knowledge of, or access to, the specific details of Aristarchus' theory. Although he had circulated an outline of his own heliocentric theory to colleagues sometime before 1514, he did not decide to publish it until he was urged to do so late in his life by his pupil Rheticus. Copernicus's challenge was to present a practical alternative to the Ptolemaic model by more elegantly and accurately determining the length of a solar year while preserving the metaphysical implications of a mathematically ordered cosmos. Thus his heliocentric model retained several of the Ptolemaic elements causing the inaccuracies, such as the planets' circular orbits, epicycles, and uniform speeds, while at the same time re-introducing such innovations as,Earth is one of several planets revolving around a stationary Sun in a determined orderEarth has three motions: daily rotation, annual revolution, and annual tilting of its axisRetrograde motion of the planets is explained by Earth's motionDistance from Earth to the Sun is small compared to the distance to the stars.↑ 1.0 1.1 ↑