Celestial Equator
... Some of the current constellations can be traced back to the inhabitants of the Euphrates valley, from whom they were handed down through the Greeks and Arabs. Few pictorial records of the ancient constellation figures have survived, but in the Almagest AD 150, Ptolemy catalogued the positions of 1, ...
... Some of the current constellations can be traced back to the inhabitants of the Euphrates valley, from whom they were handed down through the Greeks and Arabs. Few pictorial records of the ancient constellation figures have survived, but in the Almagest AD 150, Ptolemy catalogued the positions of 1, ...
ASTR 1101-001 Spring 2008 - Louisiana State University
... • Astronomers determine the mass of a star by examining how strong the gravitational field is around that star. (Isaac Newton’s law of universal gravitation; §4-7) • By studying the motion of planets around our Sun, astronomers have determined that the Sun has a mass of 2 x 1030 kilograms. • We cann ...
... • Astronomers determine the mass of a star by examining how strong the gravitational field is around that star. (Isaac Newton’s law of universal gravitation; §4-7) • By studying the motion of planets around our Sun, astronomers have determined that the Sun has a mass of 2 x 1030 kilograms. • We cann ...
Astrophysics by Daniel Yang
... to form an interference pattern. A computer then analyses this pattern and converted into an image with a resolution similar to that of a single telescope with a much larger diameter. The Very Large Array in Mexico uses interferometry – each dish is 25m in diameter, but when an array 36 km across is ...
... to form an interference pattern. A computer then analyses this pattern and converted into an image with a resolution similar to that of a single telescope with a much larger diameter. The Very Large Array in Mexico uses interferometry – each dish is 25m in diameter, but when an array 36 km across is ...
The Formation of Planetary Systems
... Venus’ retrograde rotation Earth – Moon system Mars’s north–south asymmetry Uranus’s tilted axis Astronomy 1-1 ...
... Venus’ retrograde rotation Earth – Moon system Mars’s north–south asymmetry Uranus’s tilted axis Astronomy 1-1 ...
The Scientific Method
... His data were accurate to within 1/60 of one degree, i.e., to within 1 arc minute. (Comment‐‐A simple thing which Tycho did which greatly improved his accuracy was to make several measurements of quantities and to then average his results in order to arrive at his final answer. This is standard pra ...
... His data were accurate to within 1/60 of one degree, i.e., to within 1 arc minute. (Comment‐‐A simple thing which Tycho did which greatly improved his accuracy was to make several measurements of quantities and to then average his results in order to arrive at his final answer. This is standard pra ...
Magnitude Scale and Distance Measurements
... To develop a scale by which we can assign apparent magnitudes to any star based on its intensity relative to all other stars, we devise a scale that puts 5 equal divisions between 1 and 100, and is extendable without limit on either side. The appropriate scale for this is a logarithmic scale. Recall ...
... To develop a scale by which we can assign apparent magnitudes to any star based on its intensity relative to all other stars, we devise a scale that puts 5 equal divisions between 1 and 100, and is extendable without limit on either side. The appropriate scale for this is a logarithmic scale. Recall ...
astrocoursespring2012lec4
... that is not intrinsic to the motion of the object, but due to the fact that the universe is expanding according to Hubble’s Law: Recessional Velocity = Hubble's constant times distance V = Ho D In cosmological redshift, the wavelength at which the radiation is originally emitted is (only) lengthened ...
... that is not intrinsic to the motion of the object, but due to the fact that the universe is expanding according to Hubble’s Law: Recessional Velocity = Hubble's constant times distance V = Ho D In cosmological redshift, the wavelength at which the radiation is originally emitted is (only) lengthened ...
Lecture 2: A Modern View of the Universe
... difference between summer and winter is that the Earth is closer to the Sun in summer. Which of the following is the best fact you can use to convince your friend that his/her explanation must be wrong? Why? a) days are shorter in winter than in summer b) if you are above the Arctic Circle in winter ...
... difference between summer and winter is that the Earth is closer to the Sun in summer. Which of the following is the best fact you can use to convince your friend that his/her explanation must be wrong? Why? a) days are shorter in winter than in summer b) if you are above the Arctic Circle in winter ...
Short-Period Comets
... Originate in the ______________________________, a spherical region that surrounds the solar system and extends almost half way to the nearest star. Long-period comets form when _____________________________________ or when an objects in the Oort cloud is disturbed by the gravity of a nearby _______ ...
... Originate in the ______________________________, a spherical region that surrounds the solar system and extends almost half way to the nearest star. Long-period comets form when _____________________________________ or when an objects in the Oort cloud is disturbed by the gravity of a nearby _______ ...
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 ...
Slide 1
... layer of clouds – you can’t even see the surface! Venus’ atmosphere is mostly made of carbon dioxide, which is a greenhouse gas – very good at trapping in heat! (the carbon dioxide didn’t come from cars and factories on Venus, but from lots of volcanoes!) All this means that Venus warms up from the ...
... layer of clouds – you can’t even see the surface! Venus’ atmosphere is mostly made of carbon dioxide, which is a greenhouse gas – very good at trapping in heat! (the carbon dioxide didn’t come from cars and factories on Venus, but from lots of volcanoes!) All this means that Venus warms up from the ...
Moonlight project - Observations of Lunar rotation and Ephemeris by
... physical librations and the free librations. A latitudinal component of the free libration moves the pole relative to the Moon and the physical librations moves the axis of rotation relative to the space although both make a change in an apparent position of a star. It is possible to separate the tw ...
... physical librations and the free librations. A latitudinal component of the free libration moves the pole relative to the Moon and the physical librations moves the axis of rotation relative to the space although both make a change in an apparent position of a star. It is possible to separate the tw ...
Using time to measure distance - AS-A2
... the astronomical unit (AU) which is the mean distance of Earth from Sun – 1 AU = 1.5 1011 m the parsec (pc) – 1 pc = 2.1 105 AU Take c = 3.00 108 m s–1. You will have to research or estimate some of the data needed for the questions. Distances in light-seconds Convert each of the ...
... the astronomical unit (AU) which is the mean distance of Earth from Sun – 1 AU = 1.5 1011 m the parsec (pc) – 1 pc = 2.1 105 AU Take c = 3.00 108 m s–1. You will have to research or estimate some of the data needed for the questions. Distances in light-seconds Convert each of the ...
Solar Images Taken with Calcium K
... Fig. 3. Interstellar Ca II in the Spectrum of a Hot structures. They are also important tools for Star. The interstellar medium rather than absorption understanding the atmospheres of the by the star’s atmosphere produced the Ca II K and cooler stars including the Sun. H-Lines in this spectrum o f a ...
... Fig. 3. Interstellar Ca II in the Spectrum of a Hot structures. They are also important tools for Star. The interstellar medium rather than absorption understanding the atmospheres of the by the star’s atmosphere produced the Ca II K and cooler stars including the Sun. H-Lines in this spectrum o f a ...
steady flow
... BUT: solution not trivial, especially as e, in general depend strongly on composition, temperature, and density ...
... BUT: solution not trivial, especially as e, in general depend strongly on composition, temperature, and density ...
Astrophysics notes - School
... 1/76 = 1.3x10-2 The above telescope could resolve a 10p coin (2.4cm diameter) at 16km since the angle subtended by the coin is: 2.4x10-2 / 16x104 = 1.5x10-6 rad This gives a resolving power of: 550x10-4 / 5 = 1.1x10-7 Radio astronomy is often favoured over traditional forms of astronomy since: Obs ...
... 1/76 = 1.3x10-2 The above telescope could resolve a 10p coin (2.4cm diameter) at 16km since the angle subtended by the coin is: 2.4x10-2 / 16x104 = 1.5x10-6 rad This gives a resolving power of: 550x10-4 / 5 = 1.1x10-7 Radio astronomy is often favoured over traditional forms of astronomy since: Obs ...
Designing Curriculum and Instruction in Elementary School
... How Did The Solar System form? This is an important question, and one that is difficult for scientists to understand. After all, the creation of our Solar System took place billions of years before there were any people around to witness it. Our own evolution is tied closely to the evolution of the ...
... How Did The Solar System form? This is an important question, and one that is difficult for scientists to understand. After all, the creation of our Solar System took place billions of years before there were any people around to witness it. Our own evolution is tied closely to the evolution of the ...
GPS-GSE Science Crosswalk 4th Grade
... planets in the sky. d. Evaluate strengths and limitations of models of our solar system in describing relative size, order, appearance and composition of planets and the sun. (Clarification statement: Composition of planets is limited to rocky vs. gaseous.) S4E2. Obtain, evaluate, and communicate in ...
... planets in the sky. d. Evaluate strengths and limitations of models of our solar system in describing relative size, order, appearance and composition of planets and the sun. (Clarification statement: Composition of planets is limited to rocky vs. gaseous.) S4E2. Obtain, evaluate, and communicate in ...
ppt-file 2.4 MB
... mathematical model to locate the 'habitable zone' of 47 UMa, a Sun-like star some 45 light years away. The pair devised equations coupling stellar age and luminosity, distance from the star, and planetary climate, to determine the chance of habitable planets existing near 47 UMa. They also calculate ...
... mathematical model to locate the 'habitable zone' of 47 UMa, a Sun-like star some 45 light years away. The pair devised equations coupling stellar age and luminosity, distance from the star, and planetary climate, to determine the chance of habitable planets existing near 47 UMa. They also calculate ...
Equilibrium Tides
... Tidal variations in sea level are periodic (repeating with a fixed period) and, with sufficiently long time-series of tide measurements at a given point, the tides can be predicted with great accuracy. Kelvin’s method of empirical tide prediction uses harmonic analysis to decompose a long time serie ...
... Tidal variations in sea level are periodic (repeating with a fixed period) and, with sufficiently long time-series of tide measurements at a given point, the tides can be predicted with great accuracy. Kelvin’s method of empirical tide prediction uses harmonic analysis to decompose a long time serie ...
PHYS_3380_091905_bw - in a secure place with other
... precise measurements of stellar and planetary positions - compiled best set of naked-eye observation ever made - to within 1 arcminute (thickness of a fingernail at arm’s length) - observed supernova of 1572 - proved it was farther away than the Sun - called it a nova (“new star”) - observed comet - ...
... precise measurements of stellar and planetary positions - compiled best set of naked-eye observation ever made - to within 1 arcminute (thickness of a fingernail at arm’s length) - observed supernova of 1572 - proved it was farther away than the Sun - called it a nova (“new star”) - observed comet - ...
The Sun`s magnetic field
... nucleus and thus the actual chemical element itself. But the nucleus is bound by a much stronger force than that keeping electrons attached to an atom, so to break apart this part of the atom requires much greater energy. The force that binds the nucleus operates only over very short distances, and ...
... nucleus and thus the actual chemical element itself. But the nucleus is bound by a much stronger force than that keeping electrons attached to an atom, so to break apart this part of the atom requires much greater energy. The force that binds the nucleus operates only over very short distances, and ...