Galaxy Questions Info
... (pinwheel-shaped) arms, a bulge at its center, and a halo. Spiral galaxies have a variety of shapes, and they are classified according to the size of the bulge and the tightness and appearance of the arms. The spiral arms, which wrap around the bulge, contain many young blue stars and lots of gas an ...
... (pinwheel-shaped) arms, a bulge at its center, and a halo. Spiral galaxies have a variety of shapes, and they are classified according to the size of the bulge and the tightness and appearance of the arms. The spiral arms, which wrap around the bulge, contain many young blue stars and lots of gas an ...
main characteristics of the emission from elliptical galaxies
... Now, a star is hardly an object at thermal equilibrium, in fact the temperature decreases steeply from the core to the photosphere. Fortunately we can always consider shells or layers small enough where a Local Thermodynamic Equilibrium is established: uctuations in T within each layer can happen, ...
... Now, a star is hardly an object at thermal equilibrium, in fact the temperature decreases steeply from the core to the photosphere. Fortunately we can always consider shells or layers small enough where a Local Thermodynamic Equilibrium is established: uctuations in T within each layer can happen, ...
Document
... 1999: using ASCA, X-1 in M82 was found to vary by up to a factor of four, confirming that this bright source was indeed a single object. *Over half of ULXs are known to be variable, ruling out the multiple source or SNR hypothesis. ...
... 1999: using ASCA, X-1 in M82 was found to vary by up to a factor of four, confirming that this bright source was indeed a single object. *Over half of ULXs are known to be variable, ruling out the multiple source or SNR hypothesis. ...
The Milky Way Galaxy
... Once I reach the most distant stars (which appear as the faintest) at the edge of the system, I find no more fainter stars. By repeating this procedure along all directions, I can get an idea of the shape of the stellar system. Once I measure the distance to the stars, I also estimate the size. Hers ...
... Once I reach the most distant stars (which appear as the faintest) at the edge of the system, I find no more fainter stars. By repeating this procedure along all directions, I can get an idea of the shape of the stellar system. Once I measure the distance to the stars, I also estimate the size. Hers ...
Chapter 27.1
... Nearby stars apparent position in relation to more distant stars changes as earth moves in its orbit from one side of the sun to the other. Limited to measuring the distance to stars within 1000 light years of earth. ...
... Nearby stars apparent position in relation to more distant stars changes as earth moves in its orbit from one side of the sun to the other. Limited to measuring the distance to stars within 1000 light years of earth. ...
HR Diagram (Temperature Versus Absolute Magnitude)
... single ray of light can travel in space in one year (9.5 trillion kilometers) • A single ray of light travels at about 300,000 kilometers per second in space ...
... single ray of light can travel in space in one year (9.5 trillion kilometers) • A single ray of light travels at about 300,000 kilometers per second in space ...
Introduction to Stars: Their Properties
... Define brightness (see text), apparent magnitude, absolute magnitude. ...
... Define brightness (see text), apparent magnitude, absolute magnitude. ...
The Life Cycle of Stars Introduction Stars are huge spheres of very
... in diameter, but they are very massive. A neutron star is as dense as matter in the nucleus of an atom, about 1017 kg/m3. Just a teaspoon of matter from a neutron star would weigh more than 100 million tons on Earth. Neutron stars can be detected as pulsars, or spinning neutron stars that are source ...
... in diameter, but they are very massive. A neutron star is as dense as matter in the nucleus of an atom, about 1017 kg/m3. Just a teaspoon of matter from a neutron star would weigh more than 100 million tons on Earth. Neutron stars can be detected as pulsars, or spinning neutron stars that are source ...
Stars
... • Earth rotates on its axis, this makes most constellations appear to rise in the east and set in the west during the night. • Most constellations appear in many different positions in the sky as the Earth revolves around the sun. • There is a group of stars that appear in the sky all night long and ...
... • Earth rotates on its axis, this makes most constellations appear to rise in the east and set in the west during the night. • Most constellations appear in many different positions in the sky as the Earth revolves around the sun. • There is a group of stars that appear in the sky all night long and ...
Lesson 6 - Magnitudes of Stars
... In the 2nd century BC, Hipparchus invented the Magnitude Scale. Stars are placed on the following scale These are often referred to as apparent magnitudes because the value depends on Distance from Earth ...
... In the 2nd century BC, Hipparchus invented the Magnitude Scale. Stars are placed on the following scale These are often referred to as apparent magnitudes because the value depends on Distance from Earth ...
Constellation Argo Navis
... ship which is the poop deck, the afterpart of a ship. Several extrasolar planet systems have been found around stars in the constellation Puppis. As the Milky Way also runs through Puppis, there are a large number of open clusters in the constellation. M46 and M47 are two open clusters in the same b ...
... ship which is the poop deck, the afterpart of a ship. Several extrasolar planet systems have been found around stars in the constellation Puppis. As the Milky Way also runs through Puppis, there are a large number of open clusters in the constellation. M46 and M47 are two open clusters in the same b ...
Chapter 10: Measuring the Stars - Otto
... Barnard’s star moved 227” in 22 years 10.3” per year proper motion 1.8 pc distance - transverse velocity is 88 km/s ...
... Barnard’s star moved 227” in 22 years 10.3” per year proper motion 1.8 pc distance - transverse velocity is 88 km/s ...
Stars - Trimble County Schools
... • A star is a body of gases that gives off a tremendous amount of radiant energy in the form of light and heat • Appear to be tiny specks of white light • Most vary in color and are much larger than ...
... • A star is a body of gases that gives off a tremendous amount of radiant energy in the form of light and heat • Appear to be tiny specks of white light • Most vary in color and are much larger than ...
Stellar Masses
... velocities are lower than the actual velocities. If it is in the plane of observation then twice per orbit the stars will pass in front of each other and the total luminosity will dim.[Eclipsing Binary] Sufficient visual or eclipsing binaries are known to check the mass-luminosity relationship deriv ...
... velocities are lower than the actual velocities. If it is in the plane of observation then twice per orbit the stars will pass in front of each other and the total luminosity will dim.[Eclipsing Binary] Sufficient visual or eclipsing binaries are known to check the mass-luminosity relationship deriv ...
Lecture 15 (pdf from the powerpoint)
... • The core of a red giant star is very dense, and can get to very high temperatures – If the temperature is high enough, helium fuses into Beryllium, and then fuses with another helium nuclei to form carbon. ...
... • The core of a red giant star is very dense, and can get to very high temperatures – If the temperature is high enough, helium fuses into Beryllium, and then fuses with another helium nuclei to form carbon. ...
Doppler Effect - SAVE MY EXAMS!
... Save My Exams! – The Home of Revision For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/ ...
... Save My Exams! – The Home of Revision For more awesome GCSE and A level resources, visit us at www.savemyexams.co.uk/ ...
The Transfer Equation
... Teff = 4500 K. The two stars are of nearly equal V magnitude. What is the ratio of their fluxes at 2 microns? • In an eclipsing binary system, comprised of a B5V star at Teff = 16,000K and an F0III star at Teff = 7000K, the two stars are known to have nearly equal diameters. How deep will the primar ...
... Teff = 4500 K. The two stars are of nearly equal V magnitude. What is the ratio of their fluxes at 2 microns? • In an eclipsing binary system, comprised of a B5V star at Teff = 16,000K and an F0III star at Teff = 7000K, the two stars are known to have nearly equal diameters. How deep will the primar ...
Big Bear Valley Astronomical Society
... over the Bull, which was then placed in the heavens, but for his sacrilege the gods declared that the life of his best friend, Enkidu, should be taken as a forfeit. The chief star, Aldebaran is the 1st magnitude star referred to by Ptolemy as 'the Torch' on account of its bright, rose-colored lumin ...
... over the Bull, which was then placed in the heavens, but for his sacrilege the gods declared that the life of his best friend, Enkidu, should be taken as a forfeit. The chief star, Aldebaran is the 1st magnitude star referred to by Ptolemy as 'the Torch' on account of its bright, rose-colored lumin ...
Stars and Nebulae
... galaxies were distant collections of stars, galaxies were also called nebulae because of their fuzzy appearance. Today, we reserve the word nebula for extended objects consisting mostly of gas and dust. Nebulae come in many shapes and sizes, and form in many ways. In some nebulae, stars form out of ...
... galaxies were distant collections of stars, galaxies were also called nebulae because of their fuzzy appearance. Today, we reserve the word nebula for extended objects consisting mostly of gas and dust. Nebulae come in many shapes and sizes, and form in many ways. In some nebulae, stars form out of ...
Chapter 27 Quasars, Active Galaxies, and Gamma
... – luminous, star-like nuclei with strong emission lines. • BL Lacertae objects (BL Lacs) – featureless spectrum with a brightness that can vary by a factor of 15 times in a few months. – Most commonly known as a Blazar. ...
... – luminous, star-like nuclei with strong emission lines. • BL Lacertae objects (BL Lacs) – featureless spectrum with a brightness that can vary by a factor of 15 times in a few months. – Most commonly known as a Blazar. ...
stars - science1d
... Star collapses under own gravity like white dwarf Collapsing raises temp and pressure again in star ...
... Star collapses under own gravity like white dwarf Collapsing raises temp and pressure again in star ...
The Dramatic Lives of Stars
... Given the position of young stars in the HR diagram, which of the following is true? A 0.5 solar mass star mostly: ...
... Given the position of young stars in the HR diagram, which of the following is true? A 0.5 solar mass star mostly: ...
Unit 8 Chapter 30
... How bright stars would appear if they were the same distance away from Earth or 32.6 Light years away (10 parsecs). Our sun would be a 4.8, average star, Rigel has an Absolute Magnitude of -6.4 which makes it appear brighter than most stars. Remember, all stars are not the same distance away, theref ...
... How bright stars would appear if they were the same distance away from Earth or 32.6 Light years away (10 parsecs). Our sun would be a 4.8, average star, Rigel has an Absolute Magnitude of -6.4 which makes it appear brighter than most stars. Remember, all stars are not the same distance away, theref ...
Star formation and lifetimes
... • Read the instructions and questions carefully. • Discuss the concepts and your answers with one another. Take time to understand it now!!!! • Come to a consensus answer you both agree on. • If you get stuck or are not sure of your answer, ask another group. ...
... • Read the instructions and questions carefully. • Discuss the concepts and your answers with one another. Take time to understand it now!!!! • Come to a consensus answer you both agree on. • If you get stuck or are not sure of your answer, ask another group. ...
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.