lecture3
... Tycho observed a ‘Nova stella’ – new star – in the heavens in 1572 that we would now call a supernova. The appearance of something not previously present countered the old idea of the unchanging heavens. Tycho’s main accomplishment was the body of accurate measurements of planets’ location in the sk ...
... Tycho observed a ‘Nova stella’ – new star – in the heavens in 1572 that we would now call a supernova. The appearance of something not previously present countered the old idea of the unchanging heavens. Tycho’s main accomplishment was the body of accurate measurements of planets’ location in the sk ...
The Life of a Star - Department of Physics and Astronomy
... • When the central temperature of a red giant reaches about 100 million K, helium fusion begins in the core • This process, also called the triple alpha process, converts helium to carbon and oxygen ...
... • When the central temperature of a red giant reaches about 100 million K, helium fusion begins in the core • This process, also called the triple alpha process, converts helium to carbon and oxygen ...
Ancient Astronomy
... • Having measured the position of a new star (now known as Tycho’s supernova), and observed no parallax, he concluded that it was farther away than the Moon. • This led him to question the Ptolemaic theory, according to which objects farther away than the Moon were celestial (therefore perfect) and ...
... • Having measured the position of a new star (now known as Tycho’s supernova), and observed no parallax, he concluded that it was farther away than the Moon. • This led him to question the Ptolemaic theory, according to which objects farther away than the Moon were celestial (therefore perfect) and ...
Nitrogen abundances in solar
... Work focus: non-LTE line formation, quantitative analysis Solar-type stars are valuable tracers of the chemical evolution of the Milky Way over cosmic history because of their longevity. They are numerous, accessible at high spectral resolution out to distances of several kpc with large telescopes, ...
... Work focus: non-LTE line formation, quantitative analysis Solar-type stars are valuable tracers of the chemical evolution of the Milky Way over cosmic history because of their longevity. They are numerous, accessible at high spectral resolution out to distances of several kpc with large telescopes, ...
What is a planet?
... Properties of the solar system • planetary orbital angular momentum is close to direction of Sun s spin angular momentum (within 7o) • 3 of 4 terrestrial planets and 3 of 4 giant planets have obliquities (angle between spin and orbital angular momentum) < 30o; but Uranus is tipped at 98o • inter ...
... Properties of the solar system • planetary orbital angular momentum is close to direction of Sun s spin angular momentum (within 7o) • 3 of 4 terrestrial planets and 3 of 4 giant planets have obliquities (angle between spin and orbital angular momentum) < 30o; but Uranus is tipped at 98o • inter ...
What Makes Up the Solar System?
... Saturn is best known for its rings, which is made of ice, dust, boulders, and frozen gases. Like Jupiter, Saturn has dozens of moons. Jupiter and Saturn are the only planets that can be seen from a telescope. ...
... Saturn is best known for its rings, which is made of ice, dust, boulders, and frozen gases. Like Jupiter, Saturn has dozens of moons. Jupiter and Saturn are the only planets that can be seen from a telescope. ...
2. - Quia
... 1. Would it be practical to travel to Sirius by any of the modes of travel listed on your chart? Why or why not? 2. The Voyager spacecraft were equipped with CDs that contain pictures and sounds depicting our world. One of the Voyager spacecraft is actually headed towards Sirius. If there is an inte ...
... 1. Would it be practical to travel to Sirius by any of the modes of travel listed on your chart? Why or why not? 2. The Voyager spacecraft were equipped with CDs that contain pictures and sounds depicting our world. One of the Voyager spacecraft is actually headed towards Sirius. If there is an inte ...
Final Exam from 2005
... a. the Earth orbits around the Sun. b. the Earth rotates on its axis. c. the Sun orbits around the center of the Galaxy. d. the planets cross their path. 24. If two intrinsically identical stars are at different distances from the Earth, the more distant star will have a. bluer color. b. higher lumi ...
... a. the Earth orbits around the Sun. b. the Earth rotates on its axis. c. the Sun orbits around the center of the Galaxy. d. the planets cross their path. 24. If two intrinsically identical stars are at different distances from the Earth, the more distant star will have a. bluer color. b. higher lumi ...
Stars and the Sun
... Objective 2: Explain how composition and surface temperatures of stars are measured • Otherwise known as how do we know all this? • Cameras, telescopes, filters to detect… • visible light, radio waves, electromagnetic radiation… • Spectroscopy • Can determine temperature, age, rotation, magnetic fi ...
... Objective 2: Explain how composition and surface temperatures of stars are measured • Otherwise known as how do we know all this? • Cameras, telescopes, filters to detect… • visible light, radio waves, electromagnetic radiation… • Spectroscopy • Can determine temperature, age, rotation, magnetic fi ...
Slide 1
... century to finally establish the heliocentric model of the solar system. • Tyco obtained very precise observations of planetary motion. • Kepler was the first to device an accurate planetary model capable of predicting the position of the planets with great accuracy. • Galileo’s telescopic observati ...
... century to finally establish the heliocentric model of the solar system. • Tyco obtained very precise observations of planetary motion. • Kepler was the first to device an accurate planetary model capable of predicting the position of the planets with great accuracy. • Galileo’s telescopic observati ...
Astro 10: Introductory Astronomy
... 2. CAI’s (calcium rich inclusions) within meteorites have a very narrow (~1600K) temperature range within which they solidify, and this corresponds to a very narrow time range when they could incorporate Al-26. Time scale <~20,000 yrs very early in formation. • 3. CAI’s are enriched in Mg-26 relativ ...
... 2. CAI’s (calcium rich inclusions) within meteorites have a very narrow (~1600K) temperature range within which they solidify, and this corresponds to a very narrow time range when they could incorporate Al-26. Time scale <~20,000 yrs very early in formation. • 3. CAI’s are enriched in Mg-26 relativ ...
Document
... The other planets of the solar system lie approximately but not exactly on the ecliptic: their orbits lie on planes which are at an angle to the ecliptic plane. This angle is called their orbital inclination i. The Earth’s orbit is also not perfectly circular: it is an ellipse, whose deviation from ...
... The other planets of the solar system lie approximately but not exactly on the ecliptic: their orbits lie on planes which are at an angle to the ecliptic plane. This angle is called their orbital inclination i. The Earth’s orbit is also not perfectly circular: it is an ellipse, whose deviation from ...
HR Diagram of One Solar Mass Evolution
... • Most stars become white dwarfs • So there are billions in our galaxy, but they are faint ...
... • Most stars become white dwarfs • So there are billions in our galaxy, but they are faint ...
Right Ascension
... The difficulty with binaries is that normally, we don't know how the plane of the orbit is orientated. This complicates the determination of masses. For this reason, eclipsing binaries are very useful. These are binary stars where once per orbit, one star passes in front of the other as seen from Ea ...
... The difficulty with binaries is that normally, we don't know how the plane of the orbit is orientated. This complicates the determination of masses. For this reason, eclipsing binaries are very useful. These are binary stars where once per orbit, one star passes in front of the other as seen from Ea ...
Nebular theory
... The Nebular Theory – How did our Solar System form? Our theory about how the solar system formed is called the nebular theory. This activity will help you understand how we think the solar system formed. 1. Write your observations from the video that shows how the planets orbit the sun. Write at lea ...
... The Nebular Theory – How did our Solar System form? Our theory about how the solar system formed is called the nebular theory. This activity will help you understand how we think the solar system formed. 1. Write your observations from the video that shows how the planets orbit the sun. Write at lea ...
EM review
... n T Average number of photons received per second, per square meter, in the wavelength range 1 2 If m is the star magnitude, and T is its photosphere temperature then: ...
... n T Average number of photons received per second, per square meter, in the wavelength range 1 2 If m is the star magnitude, and T is its photosphere temperature then: ...
Interactive Tutorial Activities in ASTR 310
... D) a is older than b because a has had many floods the extrasolar planet directly. Which of the following best C b has a larger diameter, takes less time that a to orbit describes the number of discoveries made by each method? and/or volcanic eruptions E) b receives more impacts than a so there is n ...
... D) a is older than b because a has had many floods the extrasolar planet directly. Which of the following best C b has a larger diameter, takes less time that a to orbit describes the number of discoveries made by each method? and/or volcanic eruptions E) b receives more impacts than a so there is n ...
HR diagram
... This diagram is a plot of stellar brightness (luminosity) versus stellar color (temperature). Brightness (luminosity) is plotted along the Y-axis; color (temperature) along the X-axis. The diagram is named for the two astronomers who created the first version around 1912, uncovering fundamental rela ...
... This diagram is a plot of stellar brightness (luminosity) versus stellar color (temperature). Brightness (luminosity) is plotted along the Y-axis; color (temperature) along the X-axis. The diagram is named for the two astronomers who created the first version around 1912, uncovering fundamental rela ...
Stars - Red, Blue, Old, New pt.4
... • Observed pulsations in radio waves 33 times a second. • Pulsations occur at all wavelengths--optical, X-ray, etc. • What could it be? ...
... • Observed pulsations in radio waves 33 times a second. • Pulsations occur at all wavelengths--optical, X-ray, etc. • What could it be? ...
Astronomy 12: Introduction to Astronomy
... type of star, size of star, and the star’s stage of evolution. d. It plots a star’s size and surface temperature, which allows astronomers determine its region of origin 2. What is the Main Sequence? a. The evolutionary path, as seen on the H-R diagram, that a star follows throughout its life. b. Th ...
... type of star, size of star, and the star’s stage of evolution. d. It plots a star’s size and surface temperature, which allows astronomers determine its region of origin 2. What is the Main Sequence? a. The evolutionary path, as seen on the H-R diagram, that a star follows throughout its life. b. Th ...