Quasars
... Lobes sometimes linked to nucleus by thin filaments called radio jets (relativistic: particles moving at velocities close to c) ...
... Lobes sometimes linked to nucleus by thin filaments called radio jets (relativistic: particles moving at velocities close to c) ...
ppt
... Looking into a star at any angle, we always look back to an optical depth of about t l = 2/3 as measured straight back along the line of sight Photon’s at a distance of less than 1 mean free path from the surface are likely to escape Star’s photosphere is defined to be the layer from which visible l ...
... Looking into a star at any angle, we always look back to an optical depth of about t l = 2/3 as measured straight back along the line of sight Photon’s at a distance of less than 1 mean free path from the surface are likely to escape Star’s photosphere is defined to be the layer from which visible l ...
Stars, H-R and Life Cycle of Star
... the absolute magnitude (real brightness) of a star and its surface temperature. They plotted the data on a graph. ...
... the absolute magnitude (real brightness) of a star and its surface temperature. They plotted the data on a graph. ...
ppt
... Consists of stars living out the “normal” part of their lives… Stars on MS produce energy via steady hydrogen burning (i.e., converting hydrogen into helium). Stars of different mass lie at different points on the main sequence. Mass-luminosity relation: L M4. ...
... Consists of stars living out the “normal” part of their lives… Stars on MS produce energy via steady hydrogen burning (i.e., converting hydrogen into helium). Stars of different mass lie at different points on the main sequence. Mass-luminosity relation: L M4. ...
Chapter 11: Electromagnetic Waves
... A black body is an object that is extremely hot and can only emit radiation through a very small point Planck measured the amount of light (energy being absorbed or emitted by the black body , and determined that the light is absorbed or emitted in bundles that he called quanta Planck discover ...
... A black body is an object that is extremely hot and can only emit radiation through a very small point Planck measured the amount of light (energy being absorbed or emitted by the black body , and determined that the light is absorbed or emitted in bundles that he called quanta Planck discover ...
etlife_exoplanets - University of Glasgow
... Could there be ET life like us on those planets? Finding water, carbon dioxide, and especially oxygen would be a very big clue, but we really ...
... Could there be ET life like us on those planets? Finding water, carbon dioxide, and especially oxygen would be a very big clue, but we really ...
Handout 30
... The band that runs diagonally through the Hertzsprung-Russell diagram and extends from cool, dim, red stars at the lower right to hot, bright, blue stars at the upper left. ...
... The band that runs diagonally through the Hertzsprung-Russell diagram and extends from cool, dim, red stars at the lower right to hot, bright, blue stars at the upper left. ...
The Big Bang
... the outer parts of the rotating disk to form planetisimals. Over time, these planetisimals formed the planets ...
... the outer parts of the rotating disk to form planetisimals. Over time, these planetisimals formed the planets ...
Document
... • Under collapse, protons and electrons combine to form neutrons. • 10 Km across Black Hole (If mass of core > 5 x Solar) • Not even compacted neutrons can support weight of very massive stars. ...
... • Under collapse, protons and electrons combine to form neutrons. • 10 Km across Black Hole (If mass of core > 5 x Solar) • Not even compacted neutrons can support weight of very massive stars. ...
Dark Matter and Dark Energy
... • Most of the mass-energy, about 95%, in the universe is ‘dark’. By dark we mean that it does not emit any form of electromagnetic radiation. • Dark energy and dark matter have not been directly observed but they have been inferred from observations of a wide variety of phenomena. There existence is ...
... • Most of the mass-energy, about 95%, in the universe is ‘dark’. By dark we mean that it does not emit any form of electromagnetic radiation. • Dark energy and dark matter have not been directly observed but they have been inferred from observations of a wide variety of phenomena. There existence is ...
Stars with mass less than 0.5 solar masses
... a bow wave that produce condensation among elements which forms new heavier elements. It’s the only way to produce the heavy elements we can find in nature. That’s why we are called sons of stars. ...
... a bow wave that produce condensation among elements which forms new heavier elements. It’s the only way to produce the heavy elements we can find in nature. That’s why we are called sons of stars. ...
Newton
... another object, the more strongly its gravity pulls. Black holes have the strongest gravitational pull in the entire Universe. The basic laws of gravity can be used for anything from detecting an invisible planet by studying the flickers in another star’s light, to helping the flight of a space ...
... another object, the more strongly its gravity pulls. Black holes have the strongest gravitational pull in the entire Universe. The basic laws of gravity can be used for anything from detecting an invisible planet by studying the flickers in another star’s light, to helping the flight of a space ...
Observing the Planets
... • The distance from the Sun to the centre of the Milky Way Galaxy is 24 000 light-years. • The Milky Way Galaxy is 2.3 million light-years from the Andromeda Galaxy, our nearest galactic neighbour. ...
... • The distance from the Sun to the centre of the Milky Way Galaxy is 24 000 light-years. • The Milky Way Galaxy is 2.3 million light-years from the Andromeda Galaxy, our nearest galactic neighbour. ...
Why Radio?
... Light, X-Rays, Radio, etc. are all part of the Electro-Magnetic (EM) Spectrum of energy. Light has two major properties, particles (photons) and wavelength (like waves crashing periodically on a beach). The radio that you listen to, the microwave that cooks your dinner, the color of a red rose, even ...
... Light, X-Rays, Radio, etc. are all part of the Electro-Magnetic (EM) Spectrum of energy. Light has two major properties, particles (photons) and wavelength (like waves crashing periodically on a beach). The radio that you listen to, the microwave that cooks your dinner, the color of a red rose, even ...
Why The Sky Is Blue
... scattering. Sunset colors are also determined by the amount of dust (or aerosols in general) in the atmosphere; after major volcanic eruptions they can be really spectacular, as are the sunrises, and can occasionally give rise to so-called ‘blue moons’ (but only once in a blue moon). ...
... scattering. Sunset colors are also determined by the amount of dust (or aerosols in general) in the atmosphere; after major volcanic eruptions they can be really spectacular, as are the sunrises, and can occasionally give rise to so-called ‘blue moons’ (but only once in a blue moon). ...
Today`s Powerpoint
... In 1960s Ray Davis and John Bahcall measured the neutrino flux from the Sun and found it to be lower than expected (by 30-50%) Confirmed in subsequent experiments Theory of p-p fusion well understood Solar interior well understood ...
... In 1960s Ray Davis and John Bahcall measured the neutrino flux from the Sun and found it to be lower than expected (by 30-50%) Confirmed in subsequent experiments Theory of p-p fusion well understood Solar interior well understood ...
Johnathan - WordPress.com
... Auriga is located north of the celestial equator. Its name is the Latin word for "charioteer", associating it with various mythological charioteers, including Erichthonius and Myrtilus. Auriga is most prominent in the northern Hemisphere winter sky, along with the five other constellations that have ...
... Auriga is located north of the celestial equator. Its name is the Latin word for "charioteer", associating it with various mythological charioteers, including Erichthonius and Myrtilus. Auriga is most prominent in the northern Hemisphere winter sky, along with the five other constellations that have ...
Lecture17
... trip to the nearest star (4 light-years out) takes about a decade. And time dilation will shorten the trip further for the astronaut. • The catch: The time traveler experiences a force 27 times larger than gravity on Earth to reach peak velocity. Humans can survive 27 g only for a few seconds. It’s ...
... trip to the nearest star (4 light-years out) takes about a decade. And time dilation will shorten the trip further for the astronaut. • The catch: The time traveler experiences a force 27 times larger than gravity on Earth to reach peak velocity. Humans can survive 27 g only for a few seconds. It’s ...
here - Lund Observatory
... a) Calculate the temperature of the Sun from Wien’s displacement law if the intensity maximum for the solar radiation is 470 nm. b) At the wavelength of 430 nm the intensity of the Sun is 1.14 times higher than at 550 nm. Calculate the colour temperature of the Sun using Wien’s approximation of Plan ...
... a) Calculate the temperature of the Sun from Wien’s displacement law if the intensity maximum for the solar radiation is 470 nm. b) At the wavelength of 430 nm the intensity of the Sun is 1.14 times higher than at 550 nm. Calculate the colour temperature of the Sun using Wien’s approximation of Plan ...
Dispersive Extinction Theory of Redshift
... Since then many measurements have been carried out over a wavelength range from 100 cm to submillimeter.(9,10) These measurements gave a blackbody radiation temperature of 2.7 K. This cosmic radiation was identified as the cosmic fireball radiation by Dicke, Peebles, Roll, and Wilkinson.(11) The dis ...
... Since then many measurements have been carried out over a wavelength range from 100 cm to submillimeter.(9,10) These measurements gave a blackbody radiation temperature of 2.7 K. This cosmic radiation was identified as the cosmic fireball radiation by Dicke, Peebles, Roll, and Wilkinson.(11) The dis ...
stars - Chandra X
... coronal activity depends on Teff, not mass! * Old BDs: X-ray faint – but not radio faint! Magnetic activity persists, but coronal heating ...
... coronal activity depends on Teff, not mass! * Old BDs: X-ray faint – but not radio faint! Magnetic activity persists, but coronal heating ...
Astronomical spectroscopy
Astronomical spectroscopy is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiation, including visible light, which radiates from stars and other hot celestial objects. Spectroscopy can be used to derive many properties of distant stars and galaxies, such as their chemical composition, temperature, density, mass, distance, luminosity, and relative motion using Doppler shift measurements.