The Helix Nebula • NGC 7293
... dwarf that seems to float in a sea of blue gas [white dot in center of nebula]. These tentacles, which superficially resemble comets, formed when a hot “stellar wind” of particles plowed into colder shells of dust and gas ejected previously by the doomed star. The comet-like tentacles have been obse ...
... dwarf that seems to float in a sea of blue gas [white dot in center of nebula]. These tentacles, which superficially resemble comets, formed when a hot “stellar wind” of particles plowed into colder shells of dust and gas ejected previously by the doomed star. The comet-like tentacles have been obse ...
Star formation - Grosse Pointe Public School System
... achieve high enough temperatures and pressures in their cores. • These “wanna-be” stars still glow red from light generated due to gravitational contraction. They are known as brown dwarfs, but aren’t really brown! • How does gravity create heat? When a gas is compressed, it converts some of its kin ...
... achieve high enough temperatures and pressures in their cores. • These “wanna-be” stars still glow red from light generated due to gravitational contraction. They are known as brown dwarfs, but aren’t really brown! • How does gravity create heat? When a gas is compressed, it converts some of its kin ...
The Milky Way Galaxy (ch. 23)
... HI and CO spectral lines for more distant regions. Result from radial velocities and distances: differential galactic rotation (23.12). Inner parts rotating faster than outer parts (at least at our distance from the center—see below). Note that this is just for the disk—the halo stars are moving dif ...
... HI and CO spectral lines for more distant regions. Result from radial velocities and distances: differential galactic rotation (23.12). Inner parts rotating faster than outer parts (at least at our distance from the center—see below). Note that this is just for the disk—the halo stars are moving dif ...
The Northern sky - Visit Isle of Man
... Island. The well known asterism of the Plough can be seen astride the horizon in autumn, and as the winter progresses it rises on its “tail” and sits overhead in spring. The Plough always serves as a pointer to Polaris the Pole star which gives us due North. As the Plough rises, the constellation of ...
... Island. The well known asterism of the Plough can be seen astride the horizon in autumn, and as the winter progresses it rises on its “tail” and sits overhead in spring. The Plough always serves as a pointer to Polaris the Pole star which gives us due North. As the Plough rises, the constellation of ...
Galaxies
... appear aligned along walls and filaments. Vast regions of space are completely empty: “Voids” ...
... appear aligned along walls and filaments. Vast regions of space are completely empty: “Voids” ...
THE CONSTELLATION OCTANS, THE OCTANT
... Nu Octantis is the brightest star in the constellation. It has an apparent visual magnitude of 3.76 and is approximately 69 light years distant from the solar system. The star is an orange giant with the stellar classification K1III. It is one of the least luminous giant stars known, with a mass 1.4 ...
... Nu Octantis is the brightest star in the constellation. It has an apparent visual magnitude of 3.76 and is approximately 69 light years distant from the solar system. The star is an orange giant with the stellar classification K1III. It is one of the least luminous giant stars known, with a mass 1.4 ...
astrocoursespring2012lec4
... not only the universe today, but also the universe in the past. Using modern telescopes and computers, astronomers have studied numerous properties of globular clusters. Here are just some of the quantities that we can measure for globular clusters: •size (radius), •mass, •distance from galactic cen ...
... not only the universe today, but also the universe in the past. Using modern telescopes and computers, astronomers have studied numerous properties of globular clusters. Here are just some of the quantities that we can measure for globular clusters: •size (radius), •mass, •distance from galactic cen ...
EX - Uplift North Hills Prep
... (a) Explain why a star having a mass of 50 times the solar mass would be expected to have a lifetime of many times less than that of the Sun. (a) The more massive stars will have much more nuclear material (initially hydrogen). Massive stars have greater gravity so equilibrium is reached at a highe ...
... (a) Explain why a star having a mass of 50 times the solar mass would be expected to have a lifetime of many times less than that of the Sun. (a) The more massive stars will have much more nuclear material (initially hydrogen). Massive stars have greater gravity so equilibrium is reached at a highe ...
Stellar Spectral Classes
... For which two spectral classes are these lines the prominent feature? ...
... For which two spectral classes are these lines the prominent feature? ...
The Milky Way - Houston Community College System
... end. In this chapter you will learn how stars die, and as you follow the story you will see how astronomers have tested their hypotheses against evidence to ...
... end. In this chapter you will learn how stars die, and as you follow the story you will see how astronomers have tested their hypotheses against evidence to ...
Astronomy Assignment #1
... equivalent to two differences in magnitude of 5. In other words, star D will be 10 magnitudes brighter than star C. If star C were a 9TH magnitude star, then star D would have magnitude -1. 14. The star Deneb has an apparent magnitude of 1.25 and an absolute magnitude of -8.5. What two statements ca ...
... equivalent to two differences in magnitude of 5. In other words, star D will be 10 magnitudes brighter than star C. If star C were a 9TH magnitude star, then star D would have magnitude -1. 14. The star Deneb has an apparent magnitude of 1.25 and an absolute magnitude of -8.5. What two statements ca ...
Star`s ReadingStar`s Reading(es)
... Imagine you could travel to the stars at the speed of light. To travel from Earth to the sun would take about 8 minutes, not very long for such a long trip! Yet the next nearest star, Proxima Centauri, is much farther away—a trip to Proxima Centauri would take 4.2 years! Most stars are much fart ...
... Imagine you could travel to the stars at the speed of light. To travel from Earth to the sun would take about 8 minutes, not very long for such a long trip! Yet the next nearest star, Proxima Centauri, is much farther away—a trip to Proxima Centauri would take 4.2 years! Most stars are much fart ...
White Dwarfs
... Perhaps you were surprised in earlier chapters to learn that stars are born and grow old. Modern astronomers can tell the story of the stars right to the end. Here you will learn how stars die, but to follow the story you will have to proceed with care, testing ...
... Perhaps you were surprised in earlier chapters to learn that stars are born and grow old. Modern astronomers can tell the story of the stars right to the end. Here you will learn how stars die, but to follow the story you will have to proceed with care, testing ...
Characteristics of Stars (Ph)
... Astronomers classify stars according to their physical characteristics. The main characteristics used to classify stars are size, temperature, and brightness. Sizes of Stars When you look at stars in the sky, they all appear to be the same size. Many stars are actually about the size of the sun, whi ...
... Astronomers classify stars according to their physical characteristics. The main characteristics used to classify stars are size, temperature, and brightness. Sizes of Stars When you look at stars in the sky, they all appear to be the same size. Many stars are actually about the size of the sun, whi ...
Class 28 (Jun 2) - Physics at Oregon State University
... stars to measure the distance to other galaxies. • A Cepheid’s luminosity is proportional to its period, so if we know how rapidly it brightens and dims, we know much energy it emits. • If we see a Cepheid in another galaxy, we measure its period, determine its luminosity, and calculate its distance ...
... stars to measure the distance to other galaxies. • A Cepheid’s luminosity is proportional to its period, so if we know how rapidly it brightens and dims, we know much energy it emits. • If we see a Cepheid in another galaxy, we measure its period, determine its luminosity, and calculate its distance ...
The Milky Way
... In a binary system, each star controls a finite region of space, bounded by the Roche Lobes (or Roche surfaces). ...
... In a binary system, each star controls a finite region of space, bounded by the Roche Lobes (or Roche surfaces). ...
Stars: Their Life and Afterlife
... the sun spent about 20 million years forming as a “protostar” before reaching the main sequence; it will spend about 10 billion years on the main sequence before evolving into a red giant. Later stages of stellar evolution lead to the burning of helium and other heavier elements, and it is during th ...
... the sun spent about 20 million years forming as a “protostar” before reaching the main sequence; it will spend about 10 billion years on the main sequence before evolving into a red giant. Later stages of stellar evolution lead to the burning of helium and other heavier elements, and it is during th ...
For instance, two hydrogen atoms may fuse together to form one
... For instance, two hydrogen atoms may fuse together to form one helium atom. The process by which light elements fuse into heavier ones is called nuclear fusion. Nuclear fusion releases huge amounts of energy. When the core of a clump becomes a hot, dense ball of hydrogen gas fusing into helium gas, ...
... For instance, two hydrogen atoms may fuse together to form one helium atom. The process by which light elements fuse into heavier ones is called nuclear fusion. Nuclear fusion releases huge amounts of energy. When the core of a clump becomes a hot, dense ball of hydrogen gas fusing into helium gas, ...
Hubble Space Telescope Image
... be clouds of gas and stars associated with our own Milky Way. The breakthrough came in 1924 when Edwin Hubble was able to measure the distance to the “Great Nebula in Andromeda” (M 31, at right) and found its distance to be much larger than the diameter of the Milky Way. This meant that M 31, and by ...
... be clouds of gas and stars associated with our own Milky Way. The breakthrough came in 1924 when Edwin Hubble was able to measure the distance to the “Great Nebula in Andromeda” (M 31, at right) and found its distance to be much larger than the diameter of the Milky Way. This meant that M 31, and by ...
Chapter 16
... 1. The density wave theory was first proposed by Lindblad in 1960. It is a model for spiral galaxies that proposes that the arms are the result of density waves sweeping around the galaxy. 2. A density wave is a wave in which areas of high and low pressure move through the medium. 3. The density wav ...
... 1. The density wave theory was first proposed by Lindblad in 1960. It is a model for spiral galaxies that proposes that the arms are the result of density waves sweeping around the galaxy. 2. A density wave is a wave in which areas of high and low pressure move through the medium. 3. The density wav ...
Chapter 13: The Death of Stars
... In a binary system, each star controls a finite region of space, bounded by the Roche Lobes (or Roche surfaces). ...
... In a binary system, each star controls a finite region of space, bounded by the Roche Lobes (or Roche surfaces). ...
Chapter 28 Stars and Their Characteristics
... A Star is a “self-luminous” (it is giving off light as opposed to reflecting it) sphere of gas that is undergoing Nuclear Fusion in its center. ...
... A Star is a “self-luminous” (it is giving off light as opposed to reflecting it) sphere of gas that is undergoing Nuclear Fusion in its center. ...
CHARACTERISTICS OF STARS
... The brightness of a star depends on both its size and its temperature. How bright a star looks from Earth depends on both its distance and how bright the star actually is. The brightness of a star can be described in 2 different ways: apparent brightness and absolute brightness. A star’s apparent br ...
... The brightness of a star depends on both its size and its temperature. How bright a star looks from Earth depends on both its distance and how bright the star actually is. The brightness of a star can be described in 2 different ways: apparent brightness and absolute brightness. A star’s apparent br ...
Integrative Studies 410 Our Place in the Universe
... Supernovae – Death of massive Stars • As the core collapses, it overshoots and “bounces” • A shock wave travels through the star and blows off the outer layers, including the heavy elements – a supernova • A million times brighter than a nova!! • The actual explosion takes less than a second ...
... Supernovae – Death of massive Stars • As the core collapses, it overshoots and “bounces” • A shock wave travels through the star and blows off the outer layers, including the heavy elements – a supernova • A million times brighter than a nova!! • The actual explosion takes less than a second ...
Serpens
Serpens (""the Serpent"", Greek Ὄφις) is a constellation of the northern hemisphere. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations defined by the International Astronomical Union. It is unique among the modern constellations in being split into two non-contiguous parts, Serpens Caput (Serpent's Head) to the west and Serpens Cauda (Serpent's Tail) to the east. Between these two halves lies the constellation of Ophiuchus, the ""Serpent-Bearer"". In figurative representations, the body of the serpent is represented as passing behind Ophiuchus between Mu Serpentis in Serpens Caput and Nu Serpentis in Serpens Cauda.The brightest star in Serpens is the red giant star Alpha Serpentis, or Unukalhai, in Serpens Caput, with an apparent magnitude of 2.63. Also located in Serpens Caput are the naked-eye globular cluster Messier 5 and the naked-eye variables R Serpentis and Tau4 Serpentis. Notable extragalactic objects include Seyfert's Sextet, one of the densest galaxy clusters known; Arp 220, the prototypical ultraluminous infrared galaxy; and Hoag's Object, the most famous of the very rare class of galaxies known as ring galaxies.Part of the Milky Way's galactic plane passes through Serpens Cauda, which is therefore rich in galactic deep-sky objects, such as the Eagle Nebula (IC 4703) and its associated star cluster Messier 16. The nebula measures 70 light-years by 50 light-years and contains the Pillars of Creation, three dust clouds that became famous for the image taken by the Hubble Space Telescope. Other striking objects include the Red Square Nebula, one of the few objects in astronomy to take on a square shape; and Westerhout 40, a massive nearby star-forming region consisting of a molecular cloud and an H II region.