Final Review - PCHS SCIENCE
... Ancient astronomers assumed that the Sun, planets, and stars orbited a stationary Earth in what is now known as a geocentric model, meaning “Earth centered.” Some aspects of planetary motion were difficult to explain with a geocentric model. – The normal direction of motion for all planets, as obser ...
... Ancient astronomers assumed that the Sun, planets, and stars orbited a stationary Earth in what is now known as a geocentric model, meaning “Earth centered.” Some aspects of planetary motion were difficult to explain with a geocentric model. – The normal direction of motion for all planets, as obser ...
Astronomy 2 Relativity and Gravitation
... alternative to a standard H-R diagram based on spectral class? Advantages: - It relies on an objective classification – i.e. measurement-based classification - It is possible to classify every object by measuring the flux through standard filters. - Avoids ‘digitisation’ of the HR diagram, as classi ...
... alternative to a standard H-R diagram based on spectral class? Advantages: - It relies on an objective classification – i.e. measurement-based classification - It is possible to classify every object by measuring the flux through standard filters. - Avoids ‘digitisation’ of the HR diagram, as classi ...
the Sun - University of Redlands
... – At the photosphere, the density is so low that the gas is again transparent to light. – The hot convection cell tops radiate energy as a function of their temperature (5800 K). ...
... – At the photosphere, the density is so low that the gas is again transparent to light. – The hot convection cell tops radiate energy as a function of their temperature (5800 K). ...
Today`s Powerpoint
... Announcements Online calendar has been updated – check it out Homework for Chs. 6, 7, & 8 will post by tomorrow ...
... Announcements Online calendar has been updated – check it out Homework for Chs. 6, 7, & 8 will post by tomorrow ...
how to precisely measure astronomic periods of time
... Today sun, moon, planets and stars are not gods anymore, which they certainly were considered to be by the archaic societies. We now know very much about the rather complicated movements in our solar system. Besides the Earth’s uniform spin (at least within several 10000 years) around its axis and i ...
... Today sun, moon, planets and stars are not gods anymore, which they certainly were considered to be by the archaic societies. We now know very much about the rather complicated movements in our solar system. Besides the Earth’s uniform spin (at least within several 10000 years) around its axis and i ...
The Solar System
... Earth is the third planet from the Sun and it takes 365 days 5 hours 48 minutes and 46 seconds to complete the orbit. The Earth rotates on its axis once every 23 hours 56 minutes and 4.1 seconds. It has one natural satellite, the Moon, which is about 384,000 km away. Sometimes the Moon passes betwee ...
... Earth is the third planet from the Sun and it takes 365 days 5 hours 48 minutes and 46 seconds to complete the orbit. The Earth rotates on its axis once every 23 hours 56 minutes and 4.1 seconds. It has one natural satellite, the Moon, which is about 384,000 km away. Sometimes the Moon passes betwee ...
Kepler`s Law - New Mexico Tech
... The Sun’s Lifecycle • The Sun was formed about 4.57 billion years ago when a hydrogen molecular cloud collapsed. • It is about halfway through its main-sequence evolution, during this time, nuclear fusion reactions in its core fuse hydrogen into helium. • It will spend approx. 10 billion years as a ...
... The Sun’s Lifecycle • The Sun was formed about 4.57 billion years ago when a hydrogen molecular cloud collapsed. • It is about halfway through its main-sequence evolution, during this time, nuclear fusion reactions in its core fuse hydrogen into helium. • It will spend approx. 10 billion years as a ...
PHY 115–003 - Oakton Community College
... 4) At a certain time of the year, the pointer stars in the Big Dipper lie directly to the left of Polaris, when viewed from Chicago at 2 am. At the same time of year, at what time would the pointers stars of the Big Dipper appear to be directly above Polaris, as viewed from Chicago? ...
... 4) At a certain time of the year, the pointer stars in the Big Dipper lie directly to the left of Polaris, when viewed from Chicago at 2 am. At the same time of year, at what time would the pointers stars of the Big Dipper appear to be directly above Polaris, as viewed from Chicago? ...
Solar System from Web
... The Sun’s Lifecycle • The Sun was formed about 4.57 billion years ago when a hydrogen molecular cloud collapsed. • It is about halfway through its main-sequence evolution, during this time, nuclear fusion reactions in its core fuse hydrogen into helium. • It will spend approx. 10 billion years as a ...
... The Sun’s Lifecycle • The Sun was formed about 4.57 billion years ago when a hydrogen molecular cloud collapsed. • It is about halfway through its main-sequence evolution, during this time, nuclear fusion reactions in its core fuse hydrogen into helium. • It will spend approx. 10 billion years as a ...
Take Home #2 Complete the following on your own paper. Do not
... 21) Scientists have recently discovered planets orbiting other stars. Evidence shows that the current hypothesis of how our solar system formed may not accurately describe how these newly discovered systems formed. Which of the following best describes what should be done with the current hypothesis ...
... 21) Scientists have recently discovered planets orbiting other stars. Evidence shows that the current hypothesis of how our solar system formed may not accurately describe how these newly discovered systems formed. Which of the following best describes what should be done with the current hypothesis ...
Kepler`s Laws
... that the earth did not moved because their eyes could not see the motion of stars • The telescope was not invented yet. • So they could not decide which model (heliocentric or geocentric) was correct. ...
... that the earth did not moved because their eyes could not see the motion of stars • The telescope was not invented yet. • So they could not decide which model (heliocentric or geocentric) was correct. ...
Cycles: Earth, Sun, Moon by MTDavis
... ONE ROTATION of the earth on it’s axis = ONE DAY ONE MOON CYCLE =about 29.5 DAYS, which should be ONE MONTH. 12 X 29.5 = 354 days, 11 days short of the real SOLAR CALENDAR, so Julius Caesar, with the help of Greek science, changed our months to 30 or 31 day months which no longer match the moon cyc ...
... ONE ROTATION of the earth on it’s axis = ONE DAY ONE MOON CYCLE =about 29.5 DAYS, which should be ONE MONTH. 12 X 29.5 = 354 days, 11 days short of the real SOLAR CALENDAR, so Julius Caesar, with the help of Greek science, changed our months to 30 or 31 day months which no longer match the moon cyc ...
Chapter 1 Periods of Western Astronomy Prehistoric Astronomy
... • In summer months of Northern hemisphere, the Sun rises north of east and sets north of west • In winter months of Northern hemisphere, the Sun rises south of east and sets south of west • The solstices (about June 21 and December 21) are when the Sun rises at the most extreme north and south point ...
... • In summer months of Northern hemisphere, the Sun rises north of east and sets north of west • In winter months of Northern hemisphere, the Sun rises south of east and sets south of west • The solstices (about June 21 and December 21) are when the Sun rises at the most extreme north and south point ...
Telling Time by the Sun - Cornell Astronomy
... The Sun’s Path Throughout the Year • The Sun’s Declination changes throughout the year due to the inclination of the Earth on its axis. • On Sep 20th and Mar 20th, the Sun’s Declination is 0°. • The Sun’s path follows the Celestial Equator. • These are called the autumnal and vernal equinoxes. • On ...
... The Sun’s Path Throughout the Year • The Sun’s Declination changes throughout the year due to the inclination of the Earth on its axis. • On Sep 20th and Mar 20th, the Sun’s Declination is 0°. • The Sun’s path follows the Celestial Equator. • These are called the autumnal and vernal equinoxes. • On ...
Test#4
... 18. The reason the Solar system does not have a lot of dust and gas between the planets is a) the solar wind blew the dust and gas out of the Solar system b) the planets accreted all the gas and dust c) the early Solar system was made up only of Hydrogen and Helium d) the Sun burns them up 19. All ...
... 18. The reason the Solar system does not have a lot of dust and gas between the planets is a) the solar wind blew the dust and gas out of the Solar system b) the planets accreted all the gas and dust c) the early Solar system was made up only of Hydrogen and Helium d) the Sun burns them up 19. All ...
Chapter17_New
... southern hemisphere have different magnetic polarity. Over the next 11 years the average latitudes of spots shifts toward the equator. After about 11 years new spots begin to appear at 40° N and S latitude. This time, however, the polarity of the spots in the two hemispheres is different than it was ...
... southern hemisphere have different magnetic polarity. Over the next 11 years the average latitudes of spots shifts toward the equator. After about 11 years new spots begin to appear at 40° N and S latitude. This time, however, the polarity of the spots in the two hemispheres is different than it was ...
Introduction to Astronomy (high school)
... As a result of precession, the celestial north pole follows a circular pattern on the sky, once every 26,000 years. It will be closest to Polaris ~ A.D. 2100. There is nothing peculiar about Polaris at all (neither particularly bright nor nearby etc.) ...
... As a result of precession, the celestial north pole follows a circular pattern on the sky, once every 26,000 years. It will be closest to Polaris ~ A.D. 2100. There is nothing peculiar about Polaris at all (neither particularly bright nor nearby etc.) ...
Explaining Apparent Retrograde Motion
... solar system (planetary distances in AU) But . . . • The model was no more accurate and not any simpler than the Ptolemaic model in predicting planetary positions, because it still Copernicus (1473-1543) ...
... solar system (planetary distances in AU) But . . . • The model was no more accurate and not any simpler than the Ptolemaic model in predicting planetary positions, because it still Copernicus (1473-1543) ...
Feb 2008 - Amateur Astronomers, Inc.
... Although this Australian's fame was based on comets, Tebbutt made his mark in observations of variable stars, the planets, and eclipses, as well as on lunar occultations and transits of Mercury and Venus. His first major discovery was the Great Comet of 1861. He plotted over 700 asteroid and comet p ...
... Although this Australian's fame was based on comets, Tebbutt made his mark in observations of variable stars, the planets, and eclipses, as well as on lunar occultations and transits of Mercury and Venus. His first major discovery was the Great Comet of 1861. He plotted over 700 asteroid and comet p ...
TTh HW04 key
... Directions: Listed below are twenty (20) multiple-choice questions based on the material covered by the lectures this past week. Choose the correct response from those listed, along with at least a one (1) sentence justification for your answer. In the case of a question involving math, the calculat ...
... Directions: Listed below are twenty (20) multiple-choice questions based on the material covered by the lectures this past week. Choose the correct response from those listed, along with at least a one (1) sentence justification for your answer. In the case of a question involving math, the calculat ...
Homework 2
... Kepler’s Second Law says that the planet sweeps through equal areas of the orbit at equal times. As the Earth is closer to the Sun in January, it must move faster then in order to satisfy this requirement. Therefore (b) is correct. ...
... Kepler’s Second Law says that the planet sweeps through equal areas of the orbit at equal times. As the Earth is closer to the Sun in January, it must move faster then in order to satisfy this requirement. Therefore (b) is correct. ...
lecture2
... 2. The Earth revolves around (orbits) the Sun – this leads to the seasons. 3. The Earth and Sun revolve around (orbit) the center of the Galaxy. 4. The Galaxy moves through the Universe. ...
... 2. The Earth revolves around (orbits) the Sun – this leads to the seasons. 3. The Earth and Sun revolve around (orbit) the center of the Galaxy. 4. The Galaxy moves through the Universe. ...
