PHY216_lect1_2014 - Astrophysics Research Institute
... As the earth rotates, stars (like the sun) rise in the east, pass over the meridian (transit), and set in the west. The hour angle tells you how long it will be before the star transits (or how much time has passed since it transited!) • Hour Angle - angle between a star's current position and the m ...
... As the earth rotates, stars (like the sun) rise in the east, pass over the meridian (transit), and set in the west. The hour angle tells you how long it will be before the star transits (or how much time has passed since it transited!) • Hour Angle - angle between a star's current position and the m ...
Origin of stars
... cloud collapses gravitationally into a star … is still a challenging theoretical problem… Astronomers have yet to find an interstellar cloud in the actual process of collapse.” ...
... cloud collapses gravitationally into a star … is still a challenging theoretical problem… Astronomers have yet to find an interstellar cloud in the actual process of collapse.” ...
Comets, Asteroids, and Meteors- Oh My!
... Asteroids • Not all asteroids are located in the asteroids belt and can pass near Earth • Jupiter’s gravity kept the asteroids from forming a planet • Some asteroids orbit just before and after Jupiter • Largest asteroid, Ceres, is 580 mi across but most are less than a few miles across ...
... Asteroids • Not all asteroids are located in the asteroids belt and can pass near Earth • Jupiter’s gravity kept the asteroids from forming a planet • Some asteroids orbit just before and after Jupiter • Largest asteroid, Ceres, is 580 mi across but most are less than a few miles across ...
The astronauts in the upper left of this photo are working on the
... 320 km h in a semicircular arc with a radius of 220 m. Determine the tangential and radial acceleration of the car when it is halfway through the turn, assuming constant tangential acceleration. If the curve were flat, what would the coefficient of static friction have to be between the tires and th ...
... 320 km h in a semicircular arc with a radius of 220 m. Determine the tangential and radial acceleration of the car when it is halfway through the turn, assuming constant tangential acceleration. If the curve were flat, what would the coefficient of static friction have to be between the tires and th ...
File
... *25. (I) Determine the tangential and centripetal components of the net force exerted on the car (by the ground) in Example 5–8 when its speed is 15 m s . The car’s mass is 1100 kg. *26. (II) A car at the Indianapolis 500 accelerates uniformly from the pit area, going from rest to 320 km h in a semi ...
... *25. (I) Determine the tangential and centripetal components of the net force exerted on the car (by the ground) in Example 5–8 when its speed is 15 m s . The car’s mass is 1100 kg. *26. (II) A car at the Indianapolis 500 accelerates uniformly from the pit area, going from rest to 320 km h in a semi ...
Angular Measurement
... orbit about the Sun. As drawn here, the night side of Earth faces a different set of constellations at different times of the year. The twelve constellations named here comprise the astrological zodiac. ...
... orbit about the Sun. As drawn here, the night side of Earth faces a different set of constellations at different times of the year. The twelve constellations named here comprise the astrological zodiac. ...
Volume 1 (Issue 7), July 2012
... Sun dogs: Another atmospheric phenomenon that is related to haloes is called sun dogs. Sun dogs or parhelia are atmospheric phenomena that create bright spots of light in the sky, often on a luminous ring or halo on either side of the sun. When light refracts through flat horizontal ice crystals, yo ...
... Sun dogs: Another atmospheric phenomenon that is related to haloes is called sun dogs. Sun dogs or parhelia are atmospheric phenomena that create bright spots of light in the sky, often on a luminous ring or halo on either side of the sun. When light refracts through flat horizontal ice crystals, yo ...
Science Overview
... – Survey 100 square degrees for 3.5 years – Discovered systems are not quite so faint ...
... – Survey 100 square degrees for 3.5 years – Discovered systems are not quite so faint ...
Earth`s Earliest Atmosphere
... Most of the mantle was melted by the Moon-forming impact, and some of it was vaporized (Canup 2004). Immediately after the impact, the atmosphere was mostly rock vapor topped by ~2500K silicate clouds. For a thousand years the silicate clouds defined the visible face of the planet. The new Earth mig ...
... Most of the mantle was melted by the Moon-forming impact, and some of it was vaporized (Canup 2004). Immediately after the impact, the atmosphere was mostly rock vapor topped by ~2500K silicate clouds. For a thousand years the silicate clouds defined the visible face of the planet. The new Earth mig ...
Earth`s Earliest Atmosphere
... Most of the mantle was melted by the Moon-forming impact, and some of it was vaporized (Canup 2004). Immediately after the impact, the atmosphere was mostly rock vapor topped by ~2500K silicate clouds. For a thousand years the silicate clouds defined the visible face of the planet. The new Earth mig ...
... Most of the mantle was melted by the Moon-forming impact, and some of it was vaporized (Canup 2004). Immediately after the impact, the atmosphere was mostly rock vapor topped by ~2500K silicate clouds. For a thousand years the silicate clouds defined the visible face of the planet. The new Earth mig ...
The Bible and big bang cosmology
... cloud collapses gravitationally into a star … is still a challenging theoretical problem… Astronomers have yet to find an interstellar cloud in the actual process of collapse.” ...
... cloud collapses gravitationally into a star … is still a challenging theoretical problem… Astronomers have yet to find an interstellar cloud in the actual process of collapse.” ...
Inner Outer Planets Quiz
... and an incoming piece of solar system debris. The incoming debris could be an asteroid, a comet, or a meteoroid. Most meteors are caused by very small meteoroids entering the atmosphere. 4. The inner planets are also known as the terrestrial planets because they are solid, rocky planets. The gas gia ...
... and an incoming piece of solar system debris. The incoming debris could be an asteroid, a comet, or a meteoroid. Most meteors are caused by very small meteoroids entering the atmosphere. 4. The inner planets are also known as the terrestrial planets because they are solid, rocky planets. The gas gia ...
HELIOSTAT II - MEASURING THE SOLAR ROTATION
... days), or an average motion of almost exactly 1° per day (this is probably not a coincidence; it is generally assumed that ancient astronomers/mathemeticians divided the circle into 360 parts for just this reason!). Since we orbit the Sun in the same direction that it rotates, our motion "chases aft ...
... days), or an average motion of almost exactly 1° per day (this is probably not a coincidence; it is generally assumed that ancient astronomers/mathemeticians divided the circle into 360 parts for just this reason!). Since we orbit the Sun in the same direction that it rotates, our motion "chases aft ...
Constellations
... • Stars “move” East to West over the course of one Night (in circle about the North Star) • Stars “move” East to West by 2 hours per month and “return” to the same position after one Year • It’s just caused by Earth’s daily spin and yearly orbit about the Sun ...
... • Stars “move” East to West over the course of one Night (in circle about the North Star) • Stars “move” East to West by 2 hours per month and “return” to the same position after one Year • It’s just caused by Earth’s daily spin and yearly orbit about the Sun ...
iStage2_EN_iSky smart measurements of the heaven
... on the Earth. From the viewpoint of European history, the astrolabe could be considered the first mechanism that was used to locate a star in space. During the great voyages in the fifteenth century, it was used to determine positions at sea by measuring the altitude of Polaris—its height above the ho ...
... on the Earth. From the viewpoint of European history, the astrolabe could be considered the first mechanism that was used to locate a star in space. During the great voyages in the fifteenth century, it was used to determine positions at sea by measuring the altitude of Polaris—its height above the ho ...
ISP 205: Visions of the Universe
... — It rotates on its axis once a day and orbits the Sun at a distance of 1 AU = 150 million km • How is our solar system moving in the Milky Way Galaxy? — Stars in the Local Neighborhood move randomly relative to one another and orbit the center of the Milky Way in about 230 million years ...
... — It rotates on its axis once a day and orbits the Sun at a distance of 1 AU = 150 million km • How is our solar system moving in the Milky Way Galaxy? — Stars in the Local Neighborhood move randomly relative to one another and orbit the center of the Milky Way in about 230 million years ...
PDF - BYU Studies
... “heavens,” and “worlds” coming into existence and passing away. As described in detail later, this statement is arguably the single best evidence that Joseph Smith glimpsed ideas not then clearly understood in the scientific world. The Heavens Do Not Change From time immemorial, people imagined tha ...
... “heavens,” and “worlds” coming into existence and passing away. As described in detail later, this statement is arguably the single best evidence that Joseph Smith glimpsed ideas not then clearly understood in the scientific world. The Heavens Do Not Change From time immemorial, people imagined tha ...
PowerPoint
... got right but were not so sure about). Be sure you understand what the right answer is, and more importantly, why it is right. – You will need to understand and be able to use any equations that have been introduced in class. Calculations using these equations will be kept simple--it is possible to ...
... got right but were not so sure about). Be sure you understand what the right answer is, and more importantly, why it is right. – You will need to understand and be able to use any equations that have been introduced in class. Calculations using these equations will be kept simple--it is possible to ...
Linking Asteroids and Meteorites through Reflectance Spectroscopy
... • A basin was defined by Hartmann and Kuiper (1962) as a "large circular depression with distinctive concentric rings and radial lineaments." • Others consider any crater larger than 200 kilometers a basin. • The Caloris basin is 1,550 kilometers in diameter, and was probably caused by a projectile ...
... • A basin was defined by Hartmann and Kuiper (1962) as a "large circular depression with distinctive concentric rings and radial lineaments." • Others consider any crater larger than 200 kilometers a basin. • The Caloris basin is 1,550 kilometers in diameter, and was probably caused by a projectile ...
Document
... •10kpc diameter and 2kpc thick with the Sun less than a kpc from the center (rather heliocentric) •Tried to estimate Rayleigh scattering due to ISM gas but determined it to be insignificant (because most obscuration is due to ISM dust absorption which has a smaller dependence) ...
... •10kpc diameter and 2kpc thick with the Sun less than a kpc from the center (rather heliocentric) •Tried to estimate Rayleigh scattering due to ISM gas but determined it to be insignificant (because most obscuration is due to ISM dust absorption which has a smaller dependence) ...
The Bible, Science and Creation
... “As we survey all the evidence, the thought insistently arises that some supernatural agency - or rather Agency - must be involved. Is it possible that suddenly, without intending to, we have stumbled upon scientific proof of the existence of a Supreme Being?” Was it God who stepped in and so provi ...
... “As we survey all the evidence, the thought insistently arises that some supernatural agency - or rather Agency - must be involved. Is it possible that suddenly, without intending to, we have stumbled upon scientific proof of the existence of a Supreme Being?” Was it God who stepped in and so provi ...
The Bible, Science and Creation
... “As we survey all the evidence, the thought insistently arises that some supernatural agency - or rather Agency - must be involved. Is it possible that suddenly, without intending to, we have stumbled upon scientific proof of the existence of a Supreme Being?” Was it God who stepped in and so provi ...
... “As we survey all the evidence, the thought insistently arises that some supernatural agency - or rather Agency - must be involved. Is it possible that suddenly, without intending to, we have stumbled upon scientific proof of the existence of a Supreme Being?” Was it God who stepped in and so provi ...
Our_Unique_Planet
... • If too much greater - the surface temperature differences would be too great. Ice and water vapor would travel to the poles, no water anywhere else. • If much less - the habitable zone would shrink in size (think narrow band around equator) • The tilt also allows the seasons to occur. ...
... • If too much greater - the surface temperature differences would be too great. Ice and water vapor would travel to the poles, no water anywhere else. • If much less - the habitable zone would shrink in size (think narrow band around equator) • The tilt also allows the seasons to occur. ...
Relative positions of the earth, moon, and sun
... The gravity of the Moon, the pull which it exerts on the Earth, causes two high tides on the Earth every day – one every 12 hours and 25 minutes. The Moon is much smaller than the Earth, with a diameter of 2159 miles, or 3476 kilometres. It is airless, waterless and lifeless. If the moon didn't spin ...
... The gravity of the Moon, the pull which it exerts on the Earth, causes two high tides on the Earth every day – one every 12 hours and 25 minutes. The Moon is much smaller than the Earth, with a diameter of 2159 miles, or 3476 kilometres. It is airless, waterless and lifeless. If the moon didn't spin ...
Motions in the Night Sky and the Celestial Sphere
... apparent motions of the stars across the sky. It is not important that this answer is scientifically correct. It is more important that you base your explanation on the model you are using and the observations you made. (Are the stars moving around Earth, or is Earth’s motion causing the stars to ap ...
... apparent motions of the stars across the sky. It is not important that this answer is scientifically correct. It is more important that you base your explanation on the model you are using and the observations you made. (Are the stars moving around Earth, or is Earth’s motion causing the stars to ap ...
Geocentric model
In astronomy, the geocentric model (also known as geocentrism, or the Ptolemaic system) is a description of the cosmos where Earth is at the orbital center of all celestial bodies. This model served as the predominant cosmological system in many ancient civilizations such as ancient Greece including the noteworthy systems of Aristotle (see Aristotelian physics) and Ptolemy. As such, they believed that the Sun, Moon, stars, and naked eye planets circled Earth.Two commonly made observations supported the idea that Earth was the center of the Universe. The stars, the sun, and planets appear to revolve around Earth each day, making Earth the center of that system. The stars were thought to be on a celestial sphere, with the earth at its center, that rotated each day, using a line through the north and south pole as an axis. The stars closest to the equator appeared to rise and fall the greatest distance, but each star circled back to its rising point each day. The second observation supporting the geocentric model was that the Earth does not seem to move from the perspective of an Earth-bound observer, and that it is solid, stable, and unmoving.Ancient Roman and medieval philosophers usually combined the geocentric model with a spherical Earth. It is not the same as the older flat Earth model implied in some mythology, as was the case with the biblical and postbiblical Latin cosmology. The ancient Jewish Babylonian uranography pictured a flat Earth with a dome-shaped rigid canopy named firmament placed over it. (רקיע- rāqîa').However, the ancient Greeks believed that the motions of the planets were circular and not elliptical, a view that was not challenged in Western culture until the 17th century through the synthesis of theories by Copernicus and Kepler.The astronomical predictions of Ptolemy's geocentric model were used to prepare astrological and astronomical charts for over 1500 years. The geocentric model held sway into the early modern age, but from the late 16th century onward was gradually superseded by the heliocentric model of Copernicus, Galileo and Kepler. There was much resistance to the transition between these two theories. Christian theologians were reluctant to reject a theory that agreed with Bible passages (e.g. ""Sun, stand you still upon Gibeon"", Joshua 10:12 – King James 2000 Bible). Others felt a new, unknown theory could not subvert an accepted consensus for geocentrism.