The Ionization Structure of the Irregular Galaxy NGC 4449
... Galaxies are gravitationally bound aggregations of stars, gas and dust. In the 1920's, Edwin Hubble classified galaxies by their shape into three major types, spiral, elliptical and irregular. Examples are shown in Figures 1a, b and c. More details about galaxies can be found in the article from thi ...
... Galaxies are gravitationally bound aggregations of stars, gas and dust. In the 1920's, Edwin Hubble classified galaxies by their shape into three major types, spiral, elliptical and irregular. Examples are shown in Figures 1a, b and c. More details about galaxies can be found in the article from thi ...
Ay 112 Midterm review
... in terms of ne, the temperature, statistical factors, and the ionization potential. The latter enters in as an exponential and so the answer is very dependent on in. Similarly, the population of excited ...
... in terms of ne, the temperature, statistical factors, and the ionization potential. The latter enters in as an exponential and so the answer is very dependent on in. Similarly, the population of excited ...
Telling Time by the Sun - Cornell Astronomy
... inclination of the Earth on its axis. • On Sep 20th and Mar 20th, the Sun’s Declination is 0°. • The Sun’s path follows the Celestial Equator. • These are called the autumnal and vernal equinoxes. • On Dec 21st, the Sun’s Declination is -23½°. • At noon, the Sun crosses the meridian south of the Cel ...
... inclination of the Earth on its axis. • On Sep 20th and Mar 20th, the Sun’s Declination is 0°. • The Sun’s path follows the Celestial Equator. • These are called the autumnal and vernal equinoxes. • On Dec 21st, the Sun’s Declination is -23½°. • At noon, the Sun crosses the meridian south of the Cel ...
PC2491 Examples 2
... that stars and gas will be significantly tidally affected by the Milky Way. (10) A galaxy cluster contains 1000 galaxies and has a total mass of 1014 Mo. If the cluster has an extent of 3 Mpc and the dynamics of the galaxies are governed by the virial theorem, what would be the velocity dispersion o ...
... that stars and gas will be significantly tidally affected by the Milky Way. (10) A galaxy cluster contains 1000 galaxies and has a total mass of 1014 Mo. If the cluster has an extent of 3 Mpc and the dynamics of the galaxies are governed by the virial theorem, what would be the velocity dispersion o ...
chapter 8
... is, the energy source for emitted radiation is the heat or thermal energy in the body. The emission process occurs at the atomic level and involves electrons in the atoms undergoing transitions from high energy states to lower energy states. If an object is sufficiently hot that it gives off visible ...
... is, the energy source for emitted radiation is the heat or thermal energy in the body. The emission process occurs at the atomic level and involves electrons in the atoms undergoing transitions from high energy states to lower energy states. If an object is sufficiently hot that it gives off visible ...
Exam 1 Astronomy 100, Section 3 Select the most appropriate
... (D) they did not think Gods would fling us off to a distant rock far away from the center. (E) it was just a bad outcome in a coin toss. 33. An example of discrete or spectral line radiation is (A) the northern light (aurora). (B) heat lamp at the lunch counter. (C) a plasma TV screen. (D) the sunse ...
... (D) they did not think Gods would fling us off to a distant rock far away from the center. (E) it was just a bad outcome in a coin toss. 33. An example of discrete or spectral line radiation is (A) the northern light (aurora). (B) heat lamp at the lunch counter. (C) a plasma TV screen. (D) the sunse ...
Frostburg State Planetarium presents
... • Even the nearest planets appear as * (points) as we see them with our eyes; for even these objects far away Venus at closest 100x farther than our moon • To tell a planet from a star, all night stars twinkle and planets usually shine steady. • Also satellites (especially Space Station) shine stead ...
... • Even the nearest planets appear as * (points) as we see them with our eyes; for even these objects far away Venus at closest 100x farther than our moon • To tell a planet from a star, all night stars twinkle and planets usually shine steady. • Also satellites (especially Space Station) shine stead ...
ASTRONOMY 120
... Since white dwarfs have little hydrogen, they spectrum of a Type-I supernova will have weak hydrogen lines. A Type-II supernova results from the collapse of the iron core of a single supermassive star. The star first collapses inward, and then “rebounds” outward. Since most of the star is hydrogen ...
... Since white dwarfs have little hydrogen, they spectrum of a Type-I supernova will have weak hydrogen lines. A Type-II supernova results from the collapse of the iron core of a single supermassive star. The star first collapses inward, and then “rebounds” outward. Since most of the star is hydrogen ...
Globular Clusters
... the distance and 2 magnitudes dimmer than 47 Tuc, but it is still one of the 15 brightest in the sky. Worth a good look while you're in the neighbourhood! Both 47 Tuc and NGC362 are visible all year round but are best late in the year. Pavo Glob, NGC 6752. (13,000ly away). One of the best globs in t ...
... the distance and 2 magnitudes dimmer than 47 Tuc, but it is still one of the 15 brightest in the sky. Worth a good look while you're in the neighbourhood! Both 47 Tuc and NGC362 are visible all year round but are best late in the year. Pavo Glob, NGC 6752. (13,000ly away). One of the best globs in t ...
starway of heaven - Conscious Evolution
... The ruling deities of this constellation are the Ashwins, the twin-gods, the divine physicians born of Sun in his form as a horse. These twins are ever youthful, the lords of bliss and healing and are the most ready of all gods to come to the aid of humans. They are fleetfooted and faster than thoug ...
... The ruling deities of this constellation are the Ashwins, the twin-gods, the divine physicians born of Sun in his form as a horse. These twins are ever youthful, the lords of bliss and healing and are the most ready of all gods to come to the aid of humans. They are fleetfooted and faster than thoug ...
15_Testbank
... D) Because there is still uncertainty over what generates the energy in stellar cores. E) Because it refers to stellar masses and these were difficult to measure accurately. Answer: B 16) Which of the following statements about spectral types of stars is true? A) The spectral type of a star can be u ...
... D) Because there is still uncertainty over what generates the energy in stellar cores. E) Because it refers to stellar masses and these were difficult to measure accurately. Answer: B 16) Which of the following statements about spectral types of stars is true? A) The spectral type of a star can be u ...
13.1 Introduction 13.2 The Red Giant Branch
... Table 13.1 gives some representative values for the sizes and luminosities of red giant stars; a main sequence G V star may end up as a high-K or low-M luminosity class III giant. Note that the values in Table 13.1 depend largely on the spectral type, and not on the mass: stars of a wide range of ma ...
... Table 13.1 gives some representative values for the sizes and luminosities of red giant stars; a main sequence G V star may end up as a high-K or low-M luminosity class III giant. Note that the values in Table 13.1 depend largely on the spectral type, and not on the mass: stars of a wide range of ma ...
Star Clusters and their stars
... appear as MS stars that look brighter and bluer than the vast majority of stars in the cluster. It looks as if they might be the result of stellar mergers – once two stars merge, they will be more massive, and therefore hotter and fusing hydrogen at a ...
... appear as MS stars that look brighter and bluer than the vast majority of stars in the cluster. It looks as if they might be the result of stellar mergers – once two stars merge, they will be more massive, and therefore hotter and fusing hydrogen at a ...
Star_Clusters
... appear as MS stars that look brighter and bluer than the vast majority of stars in the cluster. It looks as if they might be the result of stellar mergers – once two stars merge, they will be more massive, and therefore hotter and fusing hydrogen at a ...
... appear as MS stars that look brighter and bluer than the vast majority of stars in the cluster. It looks as if they might be the result of stellar mergers – once two stars merge, they will be more massive, and therefore hotter and fusing hydrogen at a ...
Light and Spectroscopy Concept Inventory
... marked in the drawing. By comparing the positions of the lines in the spectrum to a known laboratory spectrum on Earth, which of the following properties of the nebula can be directly determined? a. Motion towards or away from Earth only. b. Temperature only. c. Chemical composition (type of atoms) ...
... marked in the drawing. By comparing the positions of the lines in the spectrum to a known laboratory spectrum on Earth, which of the following properties of the nebula can be directly determined? a. Motion towards or away from Earth only. b. Temperature only. c. Chemical composition (type of atoms) ...
Lecture 12
... • Measured in Flux Units: Energy/second/area from the source. • Depends on the Distance to the object. ASTR111 Lecture 12 ...
... • Measured in Flux Units: Energy/second/area from the source. • Depends on the Distance to the object. ASTR111 Lecture 12 ...
sachkov_2013 - Putting A Stars into Context
... of line strengths, light and magnetic field with periods ranging from a few days to many years. It is believed that this abnormal chemical composition is limited only to the outer stellar envelopes. Chemical diffusion altered by a global magnetic field can produce surface abundance non-uniformities. ...
... of line strengths, light and magnetic field with periods ranging from a few days to many years. It is believed that this abnormal chemical composition is limited only to the outer stellar envelopes. Chemical diffusion altered by a global magnetic field can produce surface abundance non-uniformities. ...
First Stars II
... Star formation in large objects (Tvir>104K) Evolution of T in the prestellar collapse Fragmentaion scale vs 5UV intensity radiation： Jn=W Bn(10 K) from massive PopIII stars ...
... Star formation in large objects (Tvir>104K) Evolution of T in the prestellar collapse Fragmentaion scale vs 5UV intensity radiation： Jn=W Bn(10 K) from massive PopIII stars ...
AST1100 Lecture Notes
... processes is used to obtain information about the universe. Some important types of radiation are • thermal radiation: the thermal motion of atoms produces electromagnetic radiation at all wavelengths. For a black body (see later), the radiation emitted at a given frequency is distributed according ...
... processes is used to obtain information about the universe. Some important types of radiation are • thermal radiation: the thermal motion of atoms produces electromagnetic radiation at all wavelengths. For a black body (see later), the radiation emitted at a given frequency is distributed according ...
Part 2 of Our Lecture
... to the same procedures followed for Tr 37) only 1 sample shows indications of active accretion (CTTS). – black dotted line : similar spectral type derived from Kenyon & Hartmann (1995) – magenta dashed line : the median disk emission in Taurus – light blue line : the median disk emission in Tr 37 ...
... to the same procedures followed for Tr 37) only 1 sample shows indications of active accretion (CTTS). – black dotted line : similar spectral type derived from Kenyon & Hartmann (1995) – magenta dashed line : the median disk emission in Taurus – light blue line : the median disk emission in Tr 37 ...
Ursa Minor
Ursa Minor (Latin: ""Smaller She-Bear"", contrasting with Ursa Major), also known as the Little Bear, is a constellation in the northern sky. Like the Great Bear, the tail of the Little Bear may also be seen as the handle of a ladle, hence the name Little Dipper. It was one of the 48 constellations listed by the 2nd-century astronomer Ptolemy, and remains one of the 88 modern constellations. Ursa Minor has traditionally been important for navigation, particularly by mariners, due to Polaris being the North Star.Polaris, the brightest star in the constellation, is a yellow-white supergiant and the brightest Cepheid variable star in the night sky, ranging from apparent magnitude 1.97 to 2.00. Beta Ursae Minoris, also known as Kochab, is an aging star that has swollen and cooled to become an orange giant with an apparent magnitude of 2.08, only slightly fainter than Polaris. Kochab and magnitude 3 Gamma Ursae Minoris have been called the ""guardians of the pole star"". Planets have been detected orbiting four of the stars, including Kochab. The constellation also contains an isolated neutron star—Calvera—and H1504+65, the hottest white dwarf yet discovered with a surface temperature of 200,000 K.