Cosmic Distance Ladder Terrence Tao (UCLA)
... to the use of the Ptolemaic model of the solar system rather than the heliocentric one). • Copernicus (1473-1543) estimated the (sidereal) period of Mars as 687 days and its distance to the Sun as 1.5 AU. Both measures are accurate to two decimal places. (Ptolemy obtained 15 years (!) AND 4.1 AU.) • ...
... to the use of the Ptolemaic model of the solar system rather than the heliocentric one). • Copernicus (1473-1543) estimated the (sidereal) period of Mars as 687 days and its distance to the Sun as 1.5 AU. Both measures are accurate to two decimal places. (Ptolemy obtained 15 years (!) AND 4.1 AU.) • ...
Lecture Two (Powerpoint format)
... In the Northern hemisphere, the stars rise in the East, set in the West, and revolve counter-clockwise around the North celestial pole. In the southern hemisphere the stars rise in the A) East, set in the West, and revolve counter-clockwise around the ...
... In the Northern hemisphere, the stars rise in the East, set in the West, and revolve counter-clockwise around the North celestial pole. In the southern hemisphere the stars rise in the A) East, set in the West, and revolve counter-clockwise around the ...
Distances in Space
... Interplanetary Distances • Compared to how far away the stars are, separation of the planets is a relatively small distance. • Examples: Distance from Earth to the Sun ~150 000 000 km and the distance between Earth and Mars is 75 000 000 km. • Units of Distance used to describe the distance betwee ...
... Interplanetary Distances • Compared to how far away the stars are, separation of the planets is a relatively small distance. • Examples: Distance from Earth to the Sun ~150 000 000 km and the distance between Earth and Mars is 75 000 000 km. • Units of Distance used to describe the distance betwee ...
Astr 1 010 Spring2Ol2 Quiz 1 Name: (Your score
... )They would move in random paths, criss-crossing the sky. B They would rise in the east on paths perpendicular to the horizon. ) They would move in circles parallel to the horizon. D) They would rise in the north on paths angled 34 degrees above the horizon. (Over for five more questions.) ...
... )They would move in random paths, criss-crossing the sky. B They would rise in the east on paths perpendicular to the horizon. ) They would move in circles parallel to the horizon. D) They would rise in the north on paths angled 34 degrees above the horizon. (Over for five more questions.) ...
Earth`s Days, Years, Seasons
... – When the North Pole it tilted away from the sun, the sun’s rays strike the ...
... – When the North Pole it tilted away from the sun, the sun’s rays strike the ...
OCN 201 The Scientific Method applied to Origin of the Universe
... confirmation bias—the tendency to look for and see only evidence that confirms what they already believe. But unlike the rest of us, they submit their ideas to formal peer review before publishing them. Once their results are published, if they’re important enough, other scientists will try to repro ...
... confirmation bias—the tendency to look for and see only evidence that confirms what they already believe. But unlike the rest of us, they submit their ideas to formal peer review before publishing them. Once their results are published, if they’re important enough, other scientists will try to repro ...
Name the terms - St John Brebeuf
... this planet spins on its side and has winds of up to 500 km/h this is the planet closest to the Sun this is the largest planet in our solar system this planet has a moon named Triton that revolves around it in the opposite direction to the planet’s rotation this gas giant is the least dense of all t ...
... this planet spins on its side and has winds of up to 500 km/h this is the planet closest to the Sun this is the largest planet in our solar system this planet has a moon named Triton that revolves around it in the opposite direction to the planet’s rotation this gas giant is the least dense of all t ...
Name: Period: Date: The Celestial Sphere What is the Celestial
... objects in space is shining onto it to make the patterns we see (like constellations). ...
... objects in space is shining onto it to make the patterns we see (like constellations). ...
Precession
... a spot near the star Polaris. • Due to its rotation, Earth has a slight bulge around its middle – gravity from the sun and moon pull on the bulge twisting Earth on its axis. • The result is that the twisting of the axis of rotation combines with the rotation of the Earth causing precession. • Earth’ ...
... a spot near the star Polaris. • Due to its rotation, Earth has a slight bulge around its middle – gravity from the sun and moon pull on the bulge twisting Earth on its axis. • The result is that the twisting of the axis of rotation combines with the rotation of the Earth causing precession. • Earth’ ...
Seasons and the Tilted Earth Name TEK 8.7A Date Period _____
... Most places on Earth experience four seasons every year. These are spring, summer, fall and winter. The seasons are caused by a combination of things: The Earth being tilted as it moves around the sun. Direct sunlight producing more heat than indirect light. The Earth moving around the sun in ...
... Most places on Earth experience four seasons every year. These are spring, summer, fall and winter. The seasons are caused by a combination of things: The Earth being tilted as it moves around the sun. Direct sunlight producing more heat than indirect light. The Earth moving around the sun in ...
Chapter 7 Rotational Motion and the Law of Gravity
... gravitational force to the elliptical planetary orbits proposed by Kepler. 5. Solve problems involving orbital speed and period. ...
... gravitational force to the elliptical planetary orbits proposed by Kepler. 5. Solve problems involving orbital speed and period. ...
Destination Antarctica Study Buddy
... I can explain why the positions of the Earth, moon, sun and stars change over time. Because the Earth orbits the sun and the moon orbits the Earth, our views of the night sky change in their positions change over time. Stars also change in position over time because the Milky Way galaxy is also rota ...
... I can explain why the positions of the Earth, moon, sun and stars change over time. Because the Earth orbits the sun and the moon orbits the Earth, our views of the night sky change in their positions change over time. Stars also change in position over time because the Milky Way galaxy is also rota ...
Friday, Sep. 5
... as the stars it is in front of, since this motion is caused by the rotation of the Earth. But from day to day the Sun slowly moves along the zodiac (also called the ecliptic). This causes it to rise with different stars and to move north and south of the celestial equator during a year. ...
... as the stars it is in front of, since this motion is caused by the rotation of the Earth. But from day to day the Sun slowly moves along the zodiac (also called the ecliptic). This causes it to rise with different stars and to move north and south of the celestial equator during a year. ...
05Sky1.ppt - NMSU Astronomy
... • As a result, the celestial sphere appears to spin around the Earth – Stars that happen to be located in the direction of the Earth’s rotation axis appear to stand still • There is such a star above the North pole : Polaris, the North Star • There is NOT such a star above the ...
... • As a result, the celestial sphere appears to spin around the Earth – Stars that happen to be located in the direction of the Earth’s rotation axis appear to stand still • There is such a star above the North pole : Polaris, the North Star • There is NOT such a star above the ...
An earthllke planet would have a rocky mantle surround
... little more than 100 years ago. the great British scientist Lord Kelvin proposed that radio waves had no practical use, X rays were a hoax. and heavier-than-air flight was Impossible. Only 25 years before the development of the nuclear bomb. Nobel Laureate Robert Millikan said that humans would neve ...
... little more than 100 years ago. the great British scientist Lord Kelvin proposed that radio waves had no practical use, X rays were a hoax. and heavier-than-air flight was Impossible. Only 25 years before the development of the nuclear bomb. Nobel Laureate Robert Millikan said that humans would neve ...
Document
... – The tilt of the Earth’s axis brings the Northern Hemisphere is tilted Hemisphere closer to the Sun in Summer, and farther away from the Sun. from the Sun in Winter creating the seasons. • Geometry is true, but this accounts for only a minute fraction of the extra heating in summer. ...
... – The tilt of the Earth’s axis brings the Northern Hemisphere is tilted Hemisphere closer to the Sun in Summer, and farther away from the Sun. from the Sun in Winter creating the seasons. • Geometry is true, but this accounts for only a minute fraction of the extra heating in summer. ...
CLOZE-ing in on Science!
... around the star in our solar system called the Sun. The word orbit describes the path that something takes when it moves in an oval or almost circular pattern. How long do these orbits take? Do you think they’re all the same? The planets are different in many ways, but they also have some similar pr ...
... around the star in our solar system called the Sun. The word orbit describes the path that something takes when it moves in an oval or almost circular pattern. How long do these orbits take? Do you think they’re all the same? The planets are different in many ways, but they also have some similar pr ...
Simon P. Balm Astronomy 5, Test #1, Sample Questions
... C) two or more nuclei fuse or stick together to form a heavier nucleus whose combined mass is slightly less than the original nucleus D) two or more nuclei fuse or stick together to form a heavier nucleus which has exactly the same mass as the original nucleus ...
... C) two or more nuclei fuse or stick together to form a heavier nucleus whose combined mass is slightly less than the original nucleus D) two or more nuclei fuse or stick together to form a heavier nucleus which has exactly the same mass as the original nucleus ...
Test#1
... When the Moon casts its shadow on the Earth, this is called a a) lunar eclipse, b) solar eclipse, c) new Moon, d) Full Moon Retrograde motion is when a) planets stop their forward motion in their orbit and perform a loop in the sky b) planets that orbit the Sun in a clockwise direction c) the appare ...
... When the Moon casts its shadow on the Earth, this is called a a) lunar eclipse, b) solar eclipse, c) new Moon, d) Full Moon Retrograde motion is when a) planets stop their forward motion in their orbit and perform a loop in the sky b) planets that orbit the Sun in a clockwise direction c) the appare ...
Copernican heliocentrism
Copernican heliocentrism is the name given to the astronomical model developed by Nicolaus Copernicus and published in 1543. It positioned the Sun near the center of the Universe, motionless, with Earth and the other planets rotating around it in circular paths modified by epicycles and at uniform speeds. The Copernican model departed from the Ptolemaic system that prevailed in Western culture for centuries, placing Earth at the center of the Universe, and is often regarded as the launching point to modern astronomy and the Scientific Revolution.Copernicus was aware that the ancient Greek Aristarchus had already proposed a heliocentric theory, and cited him as a proponent of it in a reference that was deleted before publication, but there is no evidence that Copernicus had knowledge of, or access to, the specific details of Aristarchus' theory. Although he had circulated an outline of his own heliocentric theory to colleagues sometime before 1514, he did not decide to publish it until he was urged to do so late in his life by his pupil Rheticus. Copernicus's challenge was to present a practical alternative to the Ptolemaic model by more elegantly and accurately determining the length of a solar year while preserving the metaphysical implications of a mathematically ordered cosmos. Thus his heliocentric model retained several of the Ptolemaic elements causing the inaccuracies, such as the planets' circular orbits, epicycles, and uniform speeds, while at the same time re-introducing such innovations as,Earth is one of several planets revolving around a stationary Sun in a determined orderEarth has three motions: daily rotation, annual revolution, and annual tilting of its axisRetrograde motion of the planets is explained by Earth's motionDistance from Earth to the Sun is small compared to the distance to the stars.↑ 1.0 1.1 ↑