Milky Way - Wayne Hu`s Tutorials
... where the extinction coefficient Aλ ≥ 0 depends on wavelength λ • Extinction also depends on direction, e.g. through the disk, through a giant molecular cloud, etc. Typical value at visible wavelengths and in the disk is 1 mag/kpc • Dust emits or reradiates starlight in the infrared - maps from thes ...
... where the extinction coefficient Aλ ≥ 0 depends on wavelength λ • Extinction also depends on direction, e.g. through the disk, through a giant molecular cloud, etc. Typical value at visible wavelengths and in the disk is 1 mag/kpc • Dust emits or reradiates starlight in the infrared - maps from thes ...
Sirius Astronomer - Orange County Astronomers
... space telescope had reported as having probable planets. The study revealed that many of the stars are actually somewhat larger than originally estimated. Most were slightly larger, and ¼ of the stars were at least 35% larger. Since the sizes of the planets found are calculated by the % of starlight ...
... space telescope had reported as having probable planets. The study revealed that many of the stars are actually somewhat larger than originally estimated. Most were slightly larger, and ¼ of the stars were at least 35% larger. Since the sizes of the planets found are calculated by the % of starlight ...
Document
... Nebula, is a cosmic bubble about 25 lightyears across, blown by winds from its central, bright, massive star. This colorful portrait of the nebula uses narrow band image data combined in the Hubble palette. It shows emission from sulfur, hydrogen, and oxygen atoms in the wind-blown nebula in red, gr ...
... Nebula, is a cosmic bubble about 25 lightyears across, blown by winds from its central, bright, massive star. This colorful portrait of the nebula uses narrow band image data combined in the Hubble palette. It shows emission from sulfur, hydrogen, and oxygen atoms in the wind-blown nebula in red, gr ...
S1E4 Extreme Stars
... This energy from fusion pours out from the core, setting up an outward pressure in the gas around it that balances the inward pull of gravity. When the released energy reaches the outer layers of the ball of gas and dust, it moves off into space in the form of electromagnetic radiation. The ball, n ...
... This energy from fusion pours out from the core, setting up an outward pressure in the gas around it that balances the inward pull of gravity. When the released energy reaches the outer layers of the ball of gas and dust, it moves off into space in the form of electromagnetic radiation. The ball, n ...
Rogava_Course_-_First_lecture
... • Eta Carinae had a giant eruption or supernova impostor event seen around 1843. In a few years, it produced almost as much visible light as a supernova explosion, but it survived. ...
... • Eta Carinae had a giant eruption or supernova impostor event seen around 1843. In a few years, it produced almost as much visible light as a supernova explosion, but it survived. ...
The Reflector: January 2010 - Peterborough Astronomical Association
... dwarf either of the two galaxies as they currently exist. The galactic intermingling would also result in a lot of new star formation as the huge clouds of hydrogen gas and dust within the galaxies clump together to eventually birth new stars. But that’s just one conclusion. The Milky Way could wind ...
... dwarf either of the two galaxies as they currently exist. The galactic intermingling would also result in a lot of new star formation as the huge clouds of hydrogen gas and dust within the galaxies clump together to eventually birth new stars. But that’s just one conclusion. The Milky Way could wind ...
1705 Star Charts
... brighter Pointer, is the closest naked-eye star, 4.3 light years* away. Beta Centauri, like most of the stars in Crux, is a blue-giant star hundreds of light years away. Canopus is also very luminous and distant: 13 000 times brighter than the sun and 300 light years away. Antares is a red-giant sta ...
... brighter Pointer, is the closest naked-eye star, 4.3 light years* away. Beta Centauri, like most of the stars in Crux, is a blue-giant star hundreds of light years away. Canopus is also very luminous and distant: 13 000 times brighter than the sun and 300 light years away. Antares is a red-giant sta ...
Student Literacy
... the night sky produced by the combined light of the stars. The pictures below were taken by the Hubble Space Telescope. There are many galaxies within the view of the Hubble Telescope. Even though our world seems big to us, in the universe we are very, very small. ...
... the night sky produced by the combined light of the stars. The pictures below were taken by the Hubble Space Telescope. There are many galaxies within the view of the Hubble Telescope. Even though our world seems big to us, in the universe we are very, very small. ...
Constellations and the Galactic Plane
... Constellations are simply patterns of the brightest stars in the heavens that inspired the ancients to attribute names and stories to. Orion the hunter, Cygnus the swan, Leo the lion are all familiar names to northern hemisphere night sky watchers. There are 88 named constellations, each having nume ...
... Constellations are simply patterns of the brightest stars in the heavens that inspired the ancients to attribute names and stories to. Orion the hunter, Cygnus the swan, Leo the lion are all familiar names to northern hemisphere night sky watchers. There are 88 named constellations, each having nume ...
Solutions - UC Berkeley Astronomy w
... a car look further away than you would guess from instinct. In the same way, stars in the plane of the Milky Way can look farther than they really are because of gas and dust. Chapter 16 (5) page 394, question 1 The Shapley-Curtis debate centered around the question of whether spiral nebulae are clo ...
... a car look further away than you would guess from instinct. In the same way, stars in the plane of the Milky Way can look farther than they really are because of gas and dust. Chapter 16 (5) page 394, question 1 The Shapley-Curtis debate centered around the question of whether spiral nebulae are clo ...
ALMA_BoJun605_Gruppioni
... The pixel size in both images is 12 arc seconds. The continuum emission of cold dust closely follows the spiral pattern traced by the CO emission and correlates poorly with the emission from neutral hydrogen HI clouds. Similar results have been obtained by mapping the "edge-on" galaxy NGC 891, where ...
... The pixel size in both images is 12 arc seconds. The continuum emission of cold dust closely follows the spiral pattern traced by the CO emission and correlates poorly with the emission from neutral hydrogen HI clouds. Similar results have been obtained by mapping the "edge-on" galaxy NGC 891, where ...
The Life Cycle of Spiral Arm Galaxies
... outer shell of the end-‐stage star just before it goes supernova. In which case this outer layer of the star (proton stream) is unwrapped and unbound and simply set free into space during a s ...
... outer shell of the end-‐stage star just before it goes supernova. In which case this outer layer of the star (proton stream) is unwrapped and unbound and simply set free into space during a s ...
Section 4
... other two stars in the system, Alpha Centauri A and Alpha Centauri B, form a double star. Scientists are not sure whether Proxima Centauri is really part of the system or is just passing close to the other two stars temporarily. Often one star in a binary star is much brighter and more massive than ...
... other two stars in the system, Alpha Centauri A and Alpha Centauri B, form a double star. Scientists are not sure whether Proxima Centauri is really part of the system or is just passing close to the other two stars temporarily. Often one star in a binary star is much brighter and more massive than ...
Week 9 Concept Summary - UC Berkeley Astronomy w
... emitting blackbody radiation, but generating no new energy. Since they are held up by degeneracy pressure, there is a maximum mass beyond which gravity would overcome this pressure. Called the Chandrasekhar Limit, no white dwarf can be larger than 1.4 times the mass of the sun. (e) High-Mass Star De ...
... emitting blackbody radiation, but generating no new energy. Since they are held up by degeneracy pressure, there is a maximum mass beyond which gravity would overcome this pressure. Called the Chandrasekhar Limit, no white dwarf can be larger than 1.4 times the mass of the sun. (e) High-Mass Star De ...
Lec7_2D
... blackbody law, hot things emit more light. But a star’s brightness also depends on its size – the larger the area, the more light that is emitted. The relationship between luminosity, radius, and temperature is ...
... blackbody law, hot things emit more light. But a star’s brightness also depends on its size – the larger the area, the more light that is emitted. The relationship between luminosity, radius, and temperature is ...
Star Classification
... temperature) vs. its luminosity (intrinsic brightness or absolute magnitude). On it, astronomers plot stars' color, temperature, luminosity, spectral type, and evolutionary stage. This diagram shows that there are 3 very different types of stars: ...
... temperature) vs. its luminosity (intrinsic brightness or absolute magnitude). On it, astronomers plot stars' color, temperature, luminosity, spectral type, and evolutionary stage. This diagram shows that there are 3 very different types of stars: ...
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 ...
Lecture 17 Review
... the galactic center with visible light. That these clouds are the source of stars follows from several observations: ...
... the galactic center with visible light. That these clouds are the source of stars follows from several observations: ...
Galaxies, Cosmology and the Accelera`ng Universe
... • The spiral arms are where the big bright (and short-‐ lived) stars are • Most stars are dim and spread evenly throughout the Galaxy – These were also born in spiral arms much further in the p ...
... • The spiral arms are where the big bright (and short-‐ lived) stars are • Most stars are dim and spread evenly throughout the Galaxy – These were also born in spiral arms much further in the p ...
Distance
... • How much does the apparent brightness of stars we see in the sky vary? Why? • Stars have different colors? So is the amount of light at different wavelengths the same? • Can we tell the difference between a very luminous star that is far away and in intrinsically low luminosity star that is ...
... • How much does the apparent brightness of stars we see in the sky vary? Why? • Stars have different colors? So is the amount of light at different wavelengths the same? • Can we tell the difference between a very luminous star that is far away and in intrinsically low luminosity star that is ...
17Nov_2014
... • a. Hydrogen burning is taking place in a spherical shell just outside the core; the core itself is almost pure helium. • b. Helium is being converted into carbon and oxygen in the core. • c. Helium burning is taking place in a spherical shell just outside the core. • d. hydrogen burning is taking ...
... • a. Hydrogen burning is taking place in a spherical shell just outside the core; the core itself is almost pure helium. • b. Helium is being converted into carbon and oxygen in the core. • c. Helium burning is taking place in a spherical shell just outside the core. • d. hydrogen burning is taking ...
Universe 8e Lecture Chapter 17 Nature of Stars
... shells. These include carbon fusion, neon fusion, oxygen fusion, and silicon fusion. The Deaths of the Most Massive Stars: A star with an initial mass greater than 8 M dies in a violent cataclysm in which its core collapses and most of its matter is ejected into space at high speeds. The luminosity ...
... shells. These include carbon fusion, neon fusion, oxygen fusion, and silicon fusion. The Deaths of the Most Massive Stars: A star with an initial mass greater than 8 M dies in a violent cataclysm in which its core collapses and most of its matter is ejected into space at high speeds. The luminosity ...
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.