Which Constellation is Which?
... You probably know some constellations. The Big Dipper looks like a giant pot with a long handle. Orion is named after a great hunter. You can see his belt, marked by three bright stars. Constellations are imaginary pictures in the sky. The stars look like they are all the same distance away. That’s ...
... You probably know some constellations. The Big Dipper looks like a giant pot with a long handle. Orion is named after a great hunter. You can see his belt, marked by three bright stars. Constellations are imaginary pictures in the sky. The stars look like they are all the same distance away. That’s ...
Starlight & Stars - Wayne State University Physics and Astronomy
... of an object, unless it is moving at a significant fraction of the speed of light (VERY fast!) For an object moving toward us, the red colors will be shifted to the orange and the near-infrared will be shifted to the red, etc. All of the colors shift The overall color of the object depends on the co ...
... of an object, unless it is moving at a significant fraction of the speed of light (VERY fast!) For an object moving toward us, the red colors will be shifted to the orange and the near-infrared will be shifted to the red, etc. All of the colors shift The overall color of the object depends on the co ...
Powerpoint of lecture 14
... Statistical studies of large numbers of field stars (problem: selection effects, e.g. more luminous stars dominate sample) Look at star clusters: stars all at ~same distance, and probably all of ~same age. See next lecture ...
... Statistical studies of large numbers of field stars (problem: selection effects, e.g. more luminous stars dominate sample) Look at star clusters: stars all at ~same distance, and probably all of ~same age. See next lecture ...
chapter 24 instructor notes
... chore because of the nature of stellar orbits in the Galaxy, which are neither circular nor elliptical, but more like a roseate pattern. The general direction of the Sun’s motion relative to nearby stars is readily detected in stellar proper motions, and lies roughly towards RA = 18h and Dec = +30°, ...
... chore because of the nature of stellar orbits in the Galaxy, which are neither circular nor elliptical, but more like a roseate pattern. The general direction of the Sun’s motion relative to nearby stars is readily detected in stellar proper motions, and lies roughly towards RA = 18h and Dec = +30°, ...
btg_2016_astromony
... constellation Orion, are blue. Others, like Altair in Aquila, are white. Arcturus, a bright star in the northern spring sky, is yellow-orange. Yet others, like Betelguese in Orion or Antares in Scorpius are a deeper orange-red. The closest neighboring stars to our sun Alpha (one of the pointer stars ...
... constellation Orion, are blue. Others, like Altair in Aquila, are white. Arcturus, a bright star in the northern spring sky, is yellow-orange. Yet others, like Betelguese in Orion or Antares in Scorpius are a deeper orange-red. The closest neighboring stars to our sun Alpha (one of the pointer stars ...
Test 3
... 22) An object coming toward you exhibits a a) redshift b) blueshift 23) Suppose you have two stars tugging on each other with a force of 10 38 Newtons of force. Now you double the distance between them. What is the new force? a) ¼ × 1038 b) ½ × 1038 c) 2 × 1038 d) 4 × 1038 24) A planet moves faster ...
... 22) An object coming toward you exhibits a a) redshift b) blueshift 23) Suppose you have two stars tugging on each other with a force of 10 38 Newtons of force. Now you double the distance between them. What is the new force? a) ¼ × 1038 b) ½ × 1038 c) 2 × 1038 d) 4 × 1038 24) A planet moves faster ...
Homework problems for Quiz 2: AY5 Spring 2013
... Density = mass/volume = 2 × 1033 grams/ 34 π60003 km3 convert by using 1kg/1000grams and (1km/100, 000cm)3 11. Given that hydrogen fusion produces 1018 ergs per gram of hydrogen: A. How much energy can the Sun produce with the 2 × 1032 grams of hydrogen in the core region where it is hot enough for ...
... Density = mass/volume = 2 × 1033 grams/ 34 π60003 km3 convert by using 1kg/1000grams and (1km/100, 000cm)3 11. Given that hydrogen fusion produces 1018 ergs per gram of hydrogen: A. How much energy can the Sun produce with the 2 × 1032 grams of hydrogen in the core region where it is hot enough for ...
How do stars appear to move to an observer on the
... brighter for a short time. Some white dwarfs do not just cool, they have one or more large explosions. Astronomers think this may be caused by a companion star that is having material taken from it by the white dwarf. ...
... brighter for a short time. Some white dwarfs do not just cool, they have one or more large explosions. Astronomers think this may be caused by a companion star that is having material taken from it by the white dwarf. ...
planetary nebulae
... A singularity – all their mass is squeezed into a point An event horizon – the outer edge where the force of gravity is great enough to stop light escaping. The event horizon of the smallest black holes created by supernovae should be about 12km across. ...
... A singularity – all their mass is squeezed into a point An event horizon – the outer edge where the force of gravity is great enough to stop light escaping. The event horizon of the smallest black holes created by supernovae should be about 12km across. ...
The Ever-Changing Sky
... what is in it, and how things are moving around, as if we can elevate ourselves to a vintage point outside Earth. In this chapter, we will move ourselves back to Earth. Knowing how Earth is moving in the universe, with respect to the distant stars, and with respect to the Sun, allows us to explain w ...
... what is in it, and how things are moving around, as if we can elevate ourselves to a vintage point outside Earth. In this chapter, we will move ourselves back to Earth. Knowing how Earth is moving in the universe, with respect to the distant stars, and with respect to the Sun, allows us to explain w ...
Unit 4: Astronomy
... generates energy. 4) Describe the evolution of a “low-mass” star (a star that has the same mass as our sun or smaller) once it leaves the main-sequence. {your answer should include descriptions of giants and white dwarfs} 5) Describe the evolution of a “massive” star once it leaves the main-sequence ...
... generates energy. 4) Describe the evolution of a “low-mass” star (a star that has the same mass as our sun or smaller) once it leaves the main-sequence. {your answer should include descriptions of giants and white dwarfs} 5) Describe the evolution of a “massive” star once it leaves the main-sequence ...
The Origin of the Elements - Indiana University Astronomy
... Many elements are made in supernovae when massive stars explode When stars finally deplete their nuclear fuel, they become white dwarfs, neutron stars, or black holes. In the process, much of the stellar material is returned to interstellar space ...
... Many elements are made in supernovae when massive stars explode When stars finally deplete their nuclear fuel, they become white dwarfs, neutron stars, or black holes. In the process, much of the stellar material is returned to interstellar space ...
Red Giants - Faculty Web Pages
... same way as air expanding out of a tank causes your refrigerator to cool down!). Cooler gases are, of course, redder, as described by Wien's Law, so the star gets redder. You would also think it would get dimmer, since cooler gases are also dimmer, according to the Stefan-Boltzmann Law. But the expa ...
... same way as air expanding out of a tank causes your refrigerator to cool down!). Cooler gases are, of course, redder, as described by Wien's Law, so the star gets redder. You would also think it would get dimmer, since cooler gases are also dimmer, according to the Stefan-Boltzmann Law. But the expa ...
Phys133 Sample MidTerm #2 Covers Chs.10
... 4) What happens when a star exhausts its core hydrogen supply? A) It contracts, becoming hotter and brighter. B) Its core contracts, but its outer layers expand and the star becomes bigger but cooler and therefore remains at the same brightness. C) It expands, becoming bigger but dimmer. D) It contr ...
... 4) What happens when a star exhausts its core hydrogen supply? A) It contracts, becoming hotter and brighter. B) Its core contracts, but its outer layers expand and the star becomes bigger but cooler and therefore remains at the same brightness. C) It expands, becoming bigger but dimmer. D) It contr ...
Astronomy 112: Physics of Stars Problem set 2: Due April 29 1. Time
... 7. Polytropes: A neutron star is roughly describable as a polytrope of index 1. The radius of a typical neutron star of mass 1.4 solar masses is 10 km. What is its central density? The density of the atomic nucleus is 2.4 x 10**14 g cm−3 . Compare the value you computed to this number. Neutron stars ...
... 7. Polytropes: A neutron star is roughly describable as a polytrope of index 1. The radius of a typical neutron star of mass 1.4 solar masses is 10 km. What is its central density? The density of the atomic nucleus is 2.4 x 10**14 g cm−3 . Compare the value you computed to this number. Neutron stars ...
Summer - Dark Sky Discovery
... The stars in the southern sky change as the seasons change. In summer, look out for the Summer Triangle, shown in the chart. It is made up of the stars Deneb, Vega and Altair. Deneb is the body of Cygnus, the swan, whose cross-shape is also shown. If you’re very lucky, and get a very dark night, you ...
... The stars in the southern sky change as the seasons change. In summer, look out for the Summer Triangle, shown in the chart. It is made up of the stars Deneb, Vega and Altair. Deneb is the body of Cygnus, the swan, whose cross-shape is also shown. If you’re very lucky, and get a very dark night, you ...
Evolution of High
... capture that fuses helium into heavier elements produces elements with even-number protons…and 2. Elements heavier than iron should be very rare, because they are formed only shortly before and during supernova expolsion. Measurement of the abundance of heavy elements of confirmed these predictions! ...
... capture that fuses helium into heavier elements produces elements with even-number protons…and 2. Elements heavier than iron should be very rare, because they are formed only shortly before and during supernova expolsion. Measurement of the abundance of heavy elements of confirmed these predictions! ...
Friday, January 27, 2017 First exam a week from today. Review
... batches, give them their own names, and may or may not announce them publically. New techniques will discover thousands of supernovae per year, new nomenclature. Before announced, search groups often use internal names. We have used characters from Star Wars and Southpark and most recently Nepali sp ...
... batches, give them their own names, and may or may not announce them publically. New techniques will discover thousands of supernovae per year, new nomenclature. Before announced, search groups often use internal names. We have used characters from Star Wars and Southpark and most recently Nepali sp ...
Hertzsprung-Russell Diagrams
... converting hydrogen into helium. For these stars, the hotter they are, the brighter. These stars are in the most stable part of their existence; this stage generally lasts for about 5 billion years. As stars begin to die, they become giants and supergiants (above the main sequence). These stars have ...
... converting hydrogen into helium. For these stars, the hotter they are, the brighter. These stars are in the most stable part of their existence; this stage generally lasts for about 5 billion years. As stars begin to die, they become giants and supergiants (above the main sequence). These stars have ...
Diapositiva 1
... There is no trend on rotation with age (vsin i ~ cte) M < 1.6M or B-V > 0.25-0.3: Stellar activity does not depend on age or rotation Very slow angular momentum loss. Braking time ~ 109yr. Rotational velocity distribution must be imposed the pre-main sequence evolution ...
... There is no trend on rotation with age (vsin i ~ cte) M < 1.6M or B-V > 0.25-0.3: Stellar activity does not depend on age or rotation Very slow angular momentum loss. Braking time ~ 109yr. Rotational velocity distribution must be imposed the pre-main sequence evolution ...
Stellar kinematics
Stellar kinematics is the study of the movement of stars without needing to understand how they acquired their motion. This differs from stellar dynamics, which takes into account gravitational effects. The motion of a star relative to the Sun can provide useful information about the origin and age of a star, as well as the structure and evolution of the surrounding part of the Milky Way.In astronomy, it is widely accepted that most stars are born within molecular clouds known as stellar nurseries. The stars formed within such a cloud compose open clusters containing dozens to thousands of members. These clusters dissociate over time. Stars that separate themselves from the cluster's core are designated as members of the cluster's stellar association. If the remnant later drifts through the Milky Way as a coherent assemblage, then it is termed a moving group.