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... observations of Venus, the Maya were timing some of their wars based on the stationary points of Venus and Jupiter, Humans were sacrificed on the first appearance, when Venus was at its dimmest magnitude. They observed the moon (ixchel): Was as important as the sun!, Ixchel the moon goddess battled ...
... observations of Venus, the Maya were timing some of their wars based on the stationary points of Venus and Jupiter, Humans were sacrificed on the first appearance, when Venus was at its dimmest magnitude. They observed the moon (ixchel): Was as important as the sun!, Ixchel the moon goddess battled ...
Homework problems for Quiz 2: AY5 Spring 2013
... 9. The lowest luminosity white dwarfs in the Galaxy have a luminosity of around 10−5 L . Why are there no white dwarfs with lower luminosities than this? The Galaxy has a finite age. It is not old enough for white dwarfs to have cooled to lower temperatures and associated lower luminosities. 10. Wh ...
... 9. The lowest luminosity white dwarfs in the Galaxy have a luminosity of around 10−5 L . Why are there no white dwarfs with lower luminosities than this? The Galaxy has a finite age. It is not old enough for white dwarfs to have cooled to lower temperatures and associated lower luminosities. 10. Wh ...
The HR Diagram Interpreted (PowerPoint version)
... Is the Sun an ‘Average’ Star? It is (roughly) in the middle of the range, so it is certainly not unusual. But is it average? Analogy: is a human being an average-sized living creature? We are in the ‘mid-range’, between blue whales and bacteria, giraffes and mice,… But there are many more bacteria ...
... Is the Sun an ‘Average’ Star? It is (roughly) in the middle of the range, so it is certainly not unusual. But is it average? Analogy: is a human being an average-sized living creature? We are in the ‘mid-range’, between blue whales and bacteria, giraffes and mice,… But there are many more bacteria ...
The HR Diagram Interpreted: Properties of Stars
... Is the Sun an ‘Average’ Star? It is (roughly) in the middle of the range, so it is certainly not unusual. But is it average? Analogy: is a human being an average-sized living creature? We are in the ‘mid-range’, between blue whales and bacteria, giraffes and mice,… But there are many more bacteria ...
... Is the Sun an ‘Average’ Star? It is (roughly) in the middle of the range, so it is certainly not unusual. But is it average? Analogy: is a human being an average-sized living creature? We are in the ‘mid-range’, between blue whales and bacteria, giraffes and mice,… But there are many more bacteria ...
Comets and Asteroids Up-close
... between Mars and Jupiter and the only dwarf planet located in the inner solar system. It was the first member of the asteroid belt to be discovered when Giuseppe Piazzi spotted it in 1801. ...
... between Mars and Jupiter and the only dwarf planet located in the inner solar system. It was the first member of the asteroid belt to be discovered when Giuseppe Piazzi spotted it in 1801. ...
astrophysics universe
... Nebulae Nebula is an interstellar cloud of dust, hydrogen gas and plasma. It is the first stage of a star's cycle but it can also refer to the remains of a dying star (planetary nebula). Originally nebula was a general name for any extended astronomical object, including galaxies beyond the Milky W ...
... Nebulae Nebula is an interstellar cloud of dust, hydrogen gas and plasma. It is the first stage of a star's cycle but it can also refer to the remains of a dying star (planetary nebula). Originally nebula was a general name for any extended astronomical object, including galaxies beyond the Milky W ...
ASTR100 (Spring 2008) Introduction to Astronomy Our Star
... Nuclear Potential Energy (core) Luminosity ...
... Nuclear Potential Energy (core) Luminosity ...
Page pour l`impression
... present. These locations are in resonance with Jupiter . The role of Jupiter has been to eject the bodies in resonance with the planet. The 3:2 resonance with Neptune plays the inverse role. At the location of this resonance, numerous bodies piled up, including Pluto. This resonance is stable. The r ...
... present. These locations are in resonance with Jupiter . The role of Jupiter has been to eject the bodies in resonance with the planet. The 3:2 resonance with Neptune plays the inverse role. At the location of this resonance, numerous bodies piled up, including Pluto. This resonance is stable. The r ...
Review for Exam I PHYS 1050
... • The Moon's orbit is inclined about 5o to the ecliptic. That's why there are not eclipses every month. • In order for an eclipse to occur, the Earth, Moon, and Sun must be nearly perfectly aligned. • All eclipses occur when the Moon crosses the ecliptic. – Solar eclipses are possible only at the Ne ...
... • The Moon's orbit is inclined about 5o to the ecliptic. That's why there are not eclipses every month. • In order for an eclipse to occur, the Earth, Moon, and Sun must be nearly perfectly aligned. • All eclipses occur when the Moon crosses the ecliptic. – Solar eclipses are possible only at the Ne ...
Skymapper and Kepler K2: Finding the Origin of Hot Gas Giants
... determine which stars are young. • Data/pretty images prior to May 1 would really help the proposal for K2 targets! • This is standard “fast” survey data. ...
... determine which stars are young. • Data/pretty images prior to May 1 would really help the proposal for K2 targets! • This is standard “fast” survey data. ...
UNIT VIII/B: THE EARTH IN SPACE – STARS AND GALAXIES
... Bangs and Big Crunches, over and over again (almost like the universe is breathing!). 13. Describe how the Sun/Solar System formed 4.6 billion years ago from the gas and dust (nebula) left behind by a previous star’s supernova. a. The nebular hypothesis describes the formation of the solar system. b ...
... Bangs and Big Crunches, over and over again (almost like the universe is breathing!). 13. Describe how the Sun/Solar System formed 4.6 billion years ago from the gas and dust (nebula) left behind by a previous star’s supernova. a. The nebular hypothesis describes the formation of the solar system. b ...
Scaling the Solar System
... actual diameter by the scaling factor. Likewise, to find the model distance from the sun divide the actual distance by the scaling factor. Be sure to use proper units in your example calculations since you want students to have an understanding of the units as well. 10) Assign one planet to each pai ...
... actual diameter by the scaling factor. Likewise, to find the model distance from the sun divide the actual distance by the scaling factor. Be sure to use proper units in your example calculations since you want students to have an understanding of the units as well. 10) Assign one planet to each pai ...
Large and small planets Journey through the Solar System
... Organise the children into groups of three. Give each group a sheet of coloured paper and a drawing compass. The size of the piece of paper needed to draw the planet is shown in the fifth column. Each group makes a different planet. The children complete Task 2 on the worksheet and adjust the compa ...
... Organise the children into groups of three. Give each group a sheet of coloured paper and a drawing compass. The size of the piece of paper needed to draw the planet is shown in the fifth column. Each group makes a different planet. The children complete Task 2 on the worksheet and adjust the compa ...
The Egyptians through the Romans
... …that the heavens are spherical and move spherically; …that the earth, in figure, is sensibly spherical also when taken as a whole …[that the earth] in position, lies right in the middle of the heavens, like a geometrical center; …[that the earth] in magnitude and distance, has the ratio of a point ...
... …that the heavens are spherical and move spherically; …that the earth, in figure, is sensibly spherical also when taken as a whole …[that the earth] in position, lies right in the middle of the heavens, like a geometrical center; …[that the earth] in magnitude and distance, has the ratio of a point ...
Mechanical Systems Topics 1 and 2
... The ancient Greeks studied the stars and the celestial bodies. They had a word that meant ‘wanderer’ to describe a celestial body that changed its position in the sky. ‘Wanderer’ is the origin for the word A. Comet B. Asteroid C. Star D. Planet ...
... The ancient Greeks studied the stars and the celestial bodies. They had a word that meant ‘wanderer’ to describe a celestial body that changed its position in the sky. ‘Wanderer’ is the origin for the word A. Comet B. Asteroid C. Star D. Planet ...
Solar System
... The gas giant Uranus is the farthest planet you can see without a telescope. Uranus is so cold that the methane is a liquid. Tiny drops of liquid methane form a thin cloud that covers the planet. This gives Uranus its fuzzy blue-green look. ...
... The gas giant Uranus is the farthest planet you can see without a telescope. Uranus is so cold that the methane is a liquid. Tiny drops of liquid methane form a thin cloud that covers the planet. This gives Uranus its fuzzy blue-green look. ...
Micro_lect7 - Department of Physics and Astronomy
... Man in a closed box on an accelerating rocket in deep outer space. ...
... Man in a closed box on an accelerating rocket in deep outer space. ...
Modeling the Night Sky
... Add more celestial objects to your model by handing planet cards to more students. These objects orbit the Sun like Earth, but at different rates. This works best if they come in one at a time, each with their own rate of orbiting the Sun. The following table recommends some approximations to use, a ...
... Add more celestial objects to your model by handing planet cards to more students. These objects orbit the Sun like Earth, but at different rates. This works best if they come in one at a time, each with their own rate of orbiting the Sun. The following table recommends some approximations to use, a ...
test corrections
... 28. How can a scientific hypothesis become a theory? 29. What is solar wind made of? 30. Draw a diagram of how Earth would look relative to the Sun on the first day of Summer. 31. Complete the sentence: Because Earth is tilted ,____________________________. 32. Why does Michigan have several more ho ...
... 28. How can a scientific hypothesis become a theory? 29. What is solar wind made of? 30. Draw a diagram of how Earth would look relative to the Sun on the first day of Summer. 31. Complete the sentence: Because Earth is tilted ,____________________________. 32. Why does Michigan have several more ho ...
Astronomy 82 - Problem Set #1
... buoyancy and sink back below the photosphere. 3) How long does it take for the sun to convert one Earth mass of hydrogen into helium? First, an initial check: what's a reasonable answer? The sun weighs about 300,000 as much as the earth, so if the time were only “1 hour” then the total lifetime of t ...
... buoyancy and sink back below the photosphere. 3) How long does it take for the sun to convert one Earth mass of hydrogen into helium? First, an initial check: what's a reasonable answer? The sun weighs about 300,000 as much as the earth, so if the time were only “1 hour” then the total lifetime of t ...
Week 11 Answers
... 1. The Sun will spend 10 billion years on the main sequence (i.e. converting H into He in its central core). Another star has a mass of 20 solar masses, and a luminosity of 100,000 solar luminosities. How long will it survive on the main sequence? Use the fact that a star's lifetime is proportional ...
... 1. The Sun will spend 10 billion years on the main sequence (i.e. converting H into He in its central core). Another star has a mass of 20 solar masses, and a luminosity of 100,000 solar luminosities. How long will it survive on the main sequence? Use the fact that a star's lifetime is proportional ...
Patterns in the Sky (cont)
... New system: the equatorial coordinate system. Coordinates fixed with respect to the stars From inside looking out at the surface of a sphere ...
... New system: the equatorial coordinate system. Coordinates fixed with respect to the stars From inside looking out at the surface of a sphere ...
Formation and evolution of the Solar System
The formation of the Solar System began 4.6 billion years ago with the gravitational collapse of a small part of a giant molecular cloud. Most of the collapsing mass collected in the center, forming the Sun, while the rest flattened into a protoplanetary disk out of which the planets, moons, asteroids, and other small Solar System bodies formed.This widely accepted model, known as the nebular hypothesis, was first developed in the 18th century by Emanuel Swedenborg, Immanuel Kant, and Pierre-Simon Laplace. Its subsequent development has interwoven a variety of scientific disciplines including astronomy, physics, geology, and planetary science. Since the dawn of the space age in the 1950s and the discovery of extrasolar planets in the 1990s, the model has been both challenged and refined to account for new observations.The Solar System has evolved considerably since its initial formation. Many moons have formed from circling discs of gas and dust around their parent planets, while other moons are thought to have formed independently and later been captured by their planets. Still others, such as the Moon, may be the result of giant collisions. Collisions between bodies have occurred continually up to the present day and have been central to the evolution of the Solar System. The positions of the planets often shifted due to gravitational interactions. This planetary migration is now thought to have been responsible for much of the Solar System's early evolution.In roughly 5 billion years, the Sun will cool and expand outward many times its current diameter (becoming a red giant), before casting off its outer layers as a planetary nebula and leaving behind a stellar remnant known as a white dwarf. In the far distant future, the gravity of passing stars will gradually reduce the Sun's retinue of planets. Some planets will be destroyed, others ejected into interstellar space. Ultimately, over the course of tens of billions of years, it is likely that the Sun will be left with none of the original bodies in orbit around it.