Comparing Earth, Sun and Jupiter
... • Eratosthenes calculated the size of the Earth using a simple geometric argument, comparing the height of the Sun at two different locations, at the same time. ¾ At Alexandria the Sun was 7.2° north of overhead ¾ Using basic geometry he related the distance on the spherical Earth (5000 stadia) to t ...
... • Eratosthenes calculated the size of the Earth using a simple geometric argument, comparing the height of the Sun at two different locations, at the same time. ¾ At Alexandria the Sun was 7.2° north of overhead ¾ Using basic geometry he related the distance on the spherical Earth (5000 stadia) to t ...
File
... mathematical relationship between a planet’s orbital radius and its orbital period (period is much easier to measure than distance!). This mathematical relationship is now called Kepler’s Third Law of Planetary Motion [see http://www-istp.gsfc.nasa.gov/stargaze/Skeplaws.htm]. Like the vast majority ...
... mathematical relationship between a planet’s orbital radius and its orbital period (period is much easier to measure than distance!). This mathematical relationship is now called Kepler’s Third Law of Planetary Motion [see http://www-istp.gsfc.nasa.gov/stargaze/Skeplaws.htm]. Like the vast majority ...
Actual Earth Motions
... Local Time: Time based on rotation of the Earth reflected in “apparent” motions of the Sun. Solar Noon: The time of the day when the Sun reaches its highest altitude in the sky. Solar Day: The time it takes the Earth to rotate from one solar noon to the next solar noon. Mean Solar Day: Average rate ...
... Local Time: Time based on rotation of the Earth reflected in “apparent” motions of the Sun. Solar Noon: The time of the day when the Sun reaches its highest altitude in the sky. Solar Day: The time it takes the Earth to rotate from one solar noon to the next solar noon. Mean Solar Day: Average rate ...
Measuring the Sun - Faculty Web Sites
... What did you or your group determine to be the diameter of the Sun? ACCEPTED VALUE 23,891,238 KM 100 EARTH RADII ...
... What did you or your group determine to be the diameter of the Sun? ACCEPTED VALUE 23,891,238 KM 100 EARTH RADII ...
Plotting planets
... In the table below, mean longitude is that at midnight Greenwich Mean Time in between December 31, 1999 and January 1, 2000. ...
... In the table below, mean longitude is that at midnight Greenwich Mean Time in between December 31, 1999 and January 1, 2000. ...
Definitions
... Comparable to Latitude. Expressed as an angle with respect to the celestial equator. ...
... Comparable to Latitude. Expressed as an angle with respect to the celestial equator. ...
File - e - portfolio Terene
... Question 3: Are mass and energy related? Answer yes or no and then provide a brief explanation of your answer based on the analysis of the equation. Yes. If mass doubles, energy will be doubled as well. Question 4: Analyze the statement: “if it is possible to change mass into energy a little bit of ...
... Question 3: Are mass and energy related? Answer yes or no and then provide a brief explanation of your answer based on the analysis of the equation. Yes. If mass doubles, energy will be doubled as well. Question 4: Analyze the statement: “if it is possible to change mass into energy a little bit of ...
Solar System scale model
... The Solar System is often portrayed as a line of planets, closely packed to each other. But this picture is misleading! There is a lot of space in space! Astronomical distances are measured in km and in Astronomical Units (AU). 1 AU is 149,600,000km and is the same distance between the Sun and the E ...
... The Solar System is often portrayed as a line of planets, closely packed to each other. But this picture is misleading! There is a lot of space in space! Astronomical distances are measured in km and in Astronomical Units (AU). 1 AU is 149,600,000km and is the same distance between the Sun and the E ...
The Sun, the closest star - University of Iowa Astrophysics
... The Sun: Basic physical properties • Mass: 1.989E+30 kg (330,000 mass of Earth) • Radius: 696,000 km (109 times than of Earth) • Density: 1.5 g/cc ...
... The Sun: Basic physical properties • Mass: 1.989E+30 kg (330,000 mass of Earth) • Radius: 696,000 km (109 times than of Earth) • Density: 1.5 g/cc ...
astr221lect2x
... Length of a Year • Sidereal year: Time for Earth to complete one orbit of Sun • Tropical year: Time for Earth to complete one cycle of seasons • Tropical year is about 20 minutes (1/26,000) shorter than a sidereal year because of Earth’s precession. ...
... Length of a Year • Sidereal year: Time for Earth to complete one orbit of Sun • Tropical year: Time for Earth to complete one cycle of seasons • Tropical year is about 20 minutes (1/26,000) shorter than a sidereal year because of Earth’s precession. ...
Solar System Review
... The planets have stable orbits. They don't fly away from the sun, and they don't fall into the sun. What keeps them from falling into the sun? What keeps them from flying away from the sun? Approximately how old is our solar system? ...
... The planets have stable orbits. They don't fly away from the sun, and they don't fall into the sun. What keeps them from falling into the sun? What keeps them from flying away from the sun? Approximately how old is our solar system? ...
The Sun - bronzan.net
... moons orbit the Sun in nearly the same plane, the ecliptic plane. From the Earth, this means that each day they will all rise in nearly the same direction - and later set in the opposite direction. Ten years ago, a series of time exposures caught, left to right, the Sun, Venus, the Moon, and Jupiter ...
... moons orbit the Sun in nearly the same plane, the ecliptic plane. From the Earth, this means that each day they will all rise in nearly the same direction - and later set in the opposite direction. Ten years ago, a series of time exposures caught, left to right, the Sun, Venus, the Moon, and Jupiter ...
Astronomy Review HOW SCIENTISTS BELIEVE THE SOLAR
... The hemisphere tilted toward the Sun receives more daylight hours than the hemisphere tilted away from the Sun therefore: 1. When the North Pole is in the sunlight, the Northern Hemisphere is having SUMMER. 2. When the North Pole is in darkness, the Northern Hemisphere is having WINTER. ...
... The hemisphere tilted toward the Sun receives more daylight hours than the hemisphere tilted away from the Sun therefore: 1. When the North Pole is in the sunlight, the Northern Hemisphere is having SUMMER. 2. When the North Pole is in darkness, the Northern Hemisphere is having WINTER. ...
Naked-eye astronomy
... • They only appear to be close together because they are in nearly the same direction as seen from Earth ...
... • They only appear to be close together because they are in nearly the same direction as seen from Earth ...
Astronomy 1020 Exam 1 Review Questions
... 19. Whose observations did Kepler use to formulate his 3 laws of planetary motion? Of what planet were these observations made? Why was Kepler so interested in geometric solids? 20. Who is considered the father of experimental physics? Who was the first person to use a telescope to study the cosmos? ...
... 19. Whose observations did Kepler use to formulate his 3 laws of planetary motion? Of what planet were these observations made? Why was Kepler so interested in geometric solids? 20. Who is considered the father of experimental physics? Who was the first person to use a telescope to study the cosmos? ...
day 1 hand out - the sun
... The most important star for Earth is the one at the centre of our solar system: the sun. It provides the energy needed by plants and animals, and its gravitational pull keeps the Earth in a steady orbit. By studying the Sun, we also learn about other stars. Since the sun is so close to Earth, it is ...
... The most important star for Earth is the one at the centre of our solar system: the sun. It provides the energy needed by plants and animals, and its gravitational pull keeps the Earth in a steady orbit. By studying the Sun, we also learn about other stars. Since the sun is so close to Earth, it is ...
Study Guide for 1ST Astronomy Exam
... Use the fact that the Earth rotates 15 degrees per hour to calculate time periods between celestial events. Unit 6: The Year Describe in words and using the Whole Sky Map, developed in class, the annual motion of the Sun eastward through the stars along the ecliptic defining and identifying the ...
... Use the fact that the Earth rotates 15 degrees per hour to calculate time periods between celestial events. Unit 6: The Year Describe in words and using the Whole Sky Map, developed in class, the annual motion of the Sun eastward through the stars along the ecliptic defining and identifying the ...
Problems 4 File
... ”I see myself as a huge fiery comet, a shooting star. Everyone stops, points up and gasps ”Oh look at that!” Then whoosh, and I’m gone... and they’ll never see anything like it ever again... and they won’t be able to forget me ever.” Jim Morrison (a) The asteroid 2060 Chiron is 8.5 astronomical unit ...
... ”I see myself as a huge fiery comet, a shooting star. Everyone stops, points up and gasps ”Oh look at that!” Then whoosh, and I’m gone... and they’ll never see anything like it ever again... and they won’t be able to forget me ever.” Jim Morrison (a) The asteroid 2060 Chiron is 8.5 astronomical unit ...
Comparing Earth, Sun and Jupiter
... natural consequence of the inner planets orbiting more quickly than the outer planets • Distances to planets can be determined using simple geometric calculations ¾ Interior: measure angle between planet and the Sun at greatest elongation (when they are farthest apart) ¾ Exterior: measure same angle ...
... natural consequence of the inner planets orbiting more quickly than the outer planets • Distances to planets can be determined using simple geometric calculations ¾ Interior: measure angle between planet and the Sun at greatest elongation (when they are farthest apart) ¾ Exterior: measure same angle ...
Seasonal and Daily Temperatures and the Earth’s General
... during the day and they cool by radiation at night • Air in contact with surface is heated/cooled in response • A difference in air density is produced between air next to the mountainside and air at the same altitude away from the ...
... during the day and they cool by radiation at night • Air in contact with surface is heated/cooled in response • A difference in air density is produced between air next to the mountainside and air at the same altitude away from the ...
View PDF
... The sun is the central and largest body in the solar system. The sun’s warming of the Earth and tilt of the Earth on its axis have an importan t connection to the seasons. Earth’s motion is the basis for measuring time. Objects in the sky move in regular and predictable patterns around the Sun. The ...
... The sun is the central and largest body in the solar system. The sun’s warming of the Earth and tilt of the Earth on its axis have an importan t connection to the seasons. Earth’s motion is the basis for measuring time. Objects in the sky move in regular and predictable patterns around the Sun. The ...
The Evolution of the Solar System
... kilometers across. Most of them have an orbit around the Sun between Mars and Jupiter, but some have orbits farther out or closer in, sometimes quite near to the Earth. ...
... kilometers across. Most of them have an orbit around the Sun between Mars and Jupiter, but some have orbits farther out or closer in, sometimes quite near to the Earth. ...
The Sun
... -Sunspots are areas on the sun that are darker and cooler than the surrounding areas. It is where the sun’s magnetic field pokes through the surface. (Up close view, including an Earth so you can see how big they are!) ...
... -Sunspots are areas on the sun that are darker and cooler than the surrounding areas. It is where the sun’s magnetic field pokes through the surface. (Up close view, including an Earth so you can see how big they are!) ...
Equation of time
The equation of time describes the discrepancy between two kinds of solar time. These are apparent solar time, which directly tracks the motion of the sun, and mean solar time, which tracks a fictitious ""mean"" sun with noons 24 hours apart. Apparent (or true) solar time can be obtained by measurement of the current position (hour angle) of the Sun, or indicated (with limited accuracy) by a sundial. Mean solar time, for the same place, would be the time indicated by a steady clock set so that over the year its differences from apparent solar time average to zero.The equation of time is the east or west component of the analemma, a curve representing the angular offset of the Sun from its mean position on the celestial sphere as viewed from Earth. The equation of time values for each day of the year, compiled by astronomical observatories, were widely listed in almanacs and ephemerides.