ASTR100 Class 01 - University of Maryland Department of
... C. The temperature starts low and ends high in both the raisin cake and the universe. D. The raisins stay roughly the same size as the cake expands, just as galaxies stay roughly the same size as the universe expands. E. The average distance increases with time both between raisins in the cake and b ...
... C. The temperature starts low and ends high in both the raisin cake and the universe. D. The raisins stay roughly the same size as the cake expands, just as galaxies stay roughly the same size as the universe expands. E. The average distance increases with time both between raisins in the cake and b ...
Are constellations just mythic figures in the sky?
... Galileo was able to show otherwise. • The church believed that the holy scripture had clearly indicated that the Earth is at the center of the Universe, anything else would be heresy. Galileo was put under house arrest and spent the rest of his life there. He was lucky. ...
... Galileo was able to show otherwise. • The church believed that the holy scripture had clearly indicated that the Earth is at the center of the Universe, anything else would be heresy. Galileo was put under house arrest and spent the rest of his life there. He was lucky. ...
Foundation 1 - Discovering Astronomy
... Galileo was able to show otherwise. • The church believed that the holy scripture had clearly indicated that the Earth is at the center of the Universe, anything else would be heresy. Galileo was put under house arrest and spent the rest of his life there. He was lucky. ...
... Galileo was able to show otherwise. • The church believed that the holy scripture had clearly indicated that the Earth is at the center of the Universe, anything else would be heresy. Galileo was put under house arrest and spent the rest of his life there. He was lucky. ...
Sky, Celestial Sphere and Constellations
... Twinkling is not good for astronomy, for astronomical observations, a steady atmosphere with good “seeing” is needed. ...
... Twinkling is not good for astronomy, for astronomical observations, a steady atmosphere with good “seeing” is needed. ...
Lecture 8 Ptolemy
... Ptolemy argues that we are at the center of the celestial sphere. Simplified version of Ptolemy’s argument If we were above the center we would see less than half the celestial sphere. If we were below the center we would see more than half the celestial sphere. But in fact we see half the sphere, e ...
... Ptolemy argues that we are at the center of the celestial sphere. Simplified version of Ptolemy’s argument If we were above the center we would see less than half the celestial sphere. If we were below the center we would see more than half the celestial sphere. But in fact we see half the sphere, e ...
Night sky
... Hour angle • Meridian is the half-circle running from one pole to the other through a point directly overhead. During the night, a star will reach its highest elevation above the horizon when it passes through the meridian (‘transits’). • Sidereal time is time kept relative to the stars (rather tha ...
... Hour angle • Meridian is the half-circle running from one pole to the other through a point directly overhead. During the night, a star will reach its highest elevation above the horizon when it passes through the meridian (‘transits’). • Sidereal time is time kept relative to the stars (rather tha ...
Unit Plan
... 7. How would you locate Polaris (located north, ~36⁰ above the horizon) using the altitude-azimuth coordinates? 8. What would be the altitude-azimuth coordinates for an object that is located at the zenith? 9. Why do modern astronomers continue to use the celestial sphere when they know that stars a ...
... 7. How would you locate Polaris (located north, ~36⁰ above the horizon) using the altitude-azimuth coordinates? 8. What would be the altitude-azimuth coordinates for an object that is located at the zenith? 9. Why do modern astronomers continue to use the celestial sphere when they know that stars a ...
Testing
... – Sidereal day (Earth’s rotation with respect to stars) is 4 minutes shorter than a solar day. – Sidereal month (27.3 day orbit of moon) is shorter then synodic month (29.5 day cycle of phases). – Tropical year (cycle of seasons) is 20 minutes shorter than sidereal years (time to orbit Sun). ...
... – Sidereal day (Earth’s rotation with respect to stars) is 4 minutes shorter than a solar day. – Sidereal month (27.3 day orbit of moon) is shorter then synodic month (29.5 day cycle of phases). – Tropical year (cycle of seasons) is 20 minutes shorter than sidereal years (time to orbit Sun). ...
Final Study Guide copy
... Axis – The line around with the Earth (or any planetary body) rotates Circumpolar – The stars and constellations that rotate around the north or south celestial pole that are high enough above the horizon they don’t rise or set The Direction of Spin - Looking down on the north pole, the Earth spins ...
... Axis – The line around with the Earth (or any planetary body) rotates Circumpolar – The stars and constellations that rotate around the north or south celestial pole that are high enough above the horizon they don’t rise or set The Direction of Spin - Looking down on the north pole, the Earth spins ...
Lecture 3 - Night Sky and Motion of the Earth around the Sun
... Sky coordinate system Introduce the ‘celestial sphere’ This is an imaginary sphere drawn in space with the earth at its center. We align the sphere with the Earth. ...
... Sky coordinate system Introduce the ‘celestial sphere’ This is an imaginary sphere drawn in space with the earth at its center. We align the sphere with the Earth. ...
Motions in the Sky
... meridian at 10:30 pm on January 23. When will it cross the meridian one month (30 days) later? A. 8:30 pm Stars rise 4 minutes earlier each day, B. 10:14 pm so Sirius will rise 120 minutes earlier C. 10:26 pm after one month has passed. ...
... meridian at 10:30 pm on January 23. When will it cross the meridian one month (30 days) later? A. 8:30 pm Stars rise 4 minutes earlier each day, B. 10:14 pm so Sirius will rise 120 minutes earlier C. 10:26 pm after one month has passed. ...
Armillary Sphere (1:1)
... The time obtained from the sundial is called the “true solar time” which may be different from the watch time. This is because the watch time can be considered as a reading obtained from a fictitious Sun moving along the equator at an average speed. In addition, different regions within the same tim ...
... The time obtained from the sundial is called the “true solar time” which may be different from the watch time. This is because the watch time can be considered as a reading obtained from a fictitious Sun moving along the equator at an average speed. In addition, different regions within the same tim ...
Week 1
... Stars move steadily as they randomly drift in the Galaxy. The coordinate system (tied to the Earth) shifts as the Earth precesses like a top. ...
... Stars move steadily as they randomly drift in the Galaxy. The coordinate system (tied to the Earth) shifts as the Earth precesses like a top. ...
Celestial Equator - University of Maryland Astronomy
... winter occurs when the sunlight is less direct. Spring and fall are in between. AXIS TILT is the key to the seasons; without it, we would not have seasons on Earth! ...
... winter occurs when the sunlight is less direct. Spring and fall are in between. AXIS TILT is the key to the seasons; without it, we would not have seasons on Earth! ...
Astronomy 360 - Indiana State University
... celestial sphere. Unlike the horizontal coordinate system, equatorial coordinates are independent of the observer's location and the time of the observation. This means that only one set of coordinates is required for each object, and that these same coordinates can be used by observers in different ...
... celestial sphere. Unlike the horizontal coordinate system, equatorial coordinates are independent of the observer's location and the time of the observation. This means that only one set of coordinates is required for each object, and that these same coordinates can be used by observers in different ...
Astronomy 360 - indstate.edu
... • A quarter viewed face-on from across the length of a football field is about 1 arc minute across. • Each minute of arc is divided into 60 seconds of arc • The ball in the tip of a ballpoint pen viewed from across the length of a football field is about 1 arc second across. • The Sun and Moon are b ...
... • A quarter viewed face-on from across the length of a football field is about 1 arc minute across. • Each minute of arc is divided into 60 seconds of arc • The ball in the tip of a ballpoint pen viewed from across the length of a football field is about 1 arc second across. • The Sun and Moon are b ...
Patterns in the Sky - Madison Public Schools
... Earth orbits the Sun (revolves) once every year: • at an average distance of 1 AU ≈ 150 million kilometers. • with Earth’s axis tilted by 23.5º (pointing to Polaris) It rotates in the same direction it orbits, counterclockwise as viewed from above the North Pole. ...
... Earth orbits the Sun (revolves) once every year: • at an average distance of 1 AU ≈ 150 million kilometers. • with Earth’s axis tilted by 23.5º (pointing to Polaris) It rotates in the same direction it orbits, counterclockwise as viewed from above the North Pole. ...
Constellations and Distances to Stars
... • Longitude Lines or Meridians: Imaginary lines parallel to the prime meridian. ...
... • Longitude Lines or Meridians: Imaginary lines parallel to the prime meridian. ...
ppt - Faculty Virginia
... In the Summer, the Sun is well north of the celestial equator and behaves more like a star near the north celestial pole (more like a circumpolar star) – so it is above the horizon much more than 12 hours. ...
... In the Summer, the Sun is well north of the celestial equator and behaves more like a star near the north celestial pole (more like a circumpolar star) – so it is above the horizon much more than 12 hours. ...
AN INTRODUCTION TO THE STARS AND CONSTELLATIONS
... earth's equatorial plane can be extended to intersect with the celestial equator. Viewing toward the south, locate this circle segment on TheSky projection. This line is projected upon the star field by selecting Show Equatorial Grid on the menu bar. The portion of the equatorial plane is that line ...
... earth's equatorial plane can be extended to intersect with the celestial equator. Viewing toward the south, locate this circle segment on TheSky projection. This line is projected upon the star field by selecting Show Equatorial Grid on the menu bar. The portion of the equatorial plane is that line ...
WORD - hrsbstaff.ednet.ns.ca
... c. the structure and evolution of the earth's crust. d. everything in the universe that lies above Earth's atmosphere. 02. Which of the following terms would not be associated with astronomy? a. horoscope b. telescope c. spectroscope d. celestial sphere 03. A planet is an object which a. occurs only ...
... c. the structure and evolution of the earth's crust. d. everything in the universe that lies above Earth's atmosphere. 02. Which of the following terms would not be associated with astronomy? a. horoscope b. telescope c. spectroscope d. celestial sphere 03. A planet is an object which a. occurs only ...
Document
... north and south pole goes through celestial north and south pole • Earth’s equator Celestial equator ...
... north and south pole goes through celestial north and south pole • Earth’s equator Celestial equator ...
Armillary sphere
An armillary sphere (variations are known as spherical astrolabe, armilla, or armil) is a model of objects in the sky (in the celestial sphere), consisting of a spherical framework of rings, centred on Earth or the Sun, that represent lines of celestial longitude and latitude and other astronomically important features such as the ecliptic. As such, it differs from a celestial globe, which is a smooth sphere whose principal purpose is to map the constellations.With the Earth as center, an armillary sphere is known as Ptolemaic. With the sun as center, it is known as Copernican.