Luminosity
... The Luminosity of a star is the energy that it releases per second. Sun has a luminosity of 3.90x1026 W (often written as L): it emits 3.90x1026 joules per second in all directions. The energy that arrives at the Earth is only a very small amount when compared will the total energy released by the ...
... The Luminosity of a star is the energy that it releases per second. Sun has a luminosity of 3.90x1026 W (often written as L): it emits 3.90x1026 joules per second in all directions. The energy that arrives at the Earth is only a very small amount when compared will the total energy released by the ...
Where do we come from?
... years The growth of black holes. Clusters of gargantuan black holes (1011 solar masses) in place of clusters of galaxies. Moving black holes radiate gravitational waves (ripples in space-time). ...
... years The growth of black holes. Clusters of gargantuan black holes (1011 solar masses) in place of clusters of galaxies. Moving black holes radiate gravitational waves (ripples in space-time). ...
Patterns in the Sky - Madison Public Schools
... All galaxies outside our Local Group are moving away from us. The more distant the galaxy, the faster it is racing away. Conclusion: We live in an expanding universe. ...
... All galaxies outside our Local Group are moving away from us. The more distant the galaxy, the faster it is racing away. Conclusion: We live in an expanding universe. ...
A105 Stars and Galaxies
... A planet needs the right star! Constraints on star systems: 1) Old enough to allow time for evolution (rules out high-mass stars - 1%) 2) Need to have stable orbits (might rule out binary/multiple star systems - 50%) 3) Size of “habitable zone”: region in which a planet of the right size could have ...
... A planet needs the right star! Constraints on star systems: 1) Old enough to allow time for evolution (rules out high-mass stars - 1%) 2) Need to have stable orbits (might rule out binary/multiple star systems - 50%) 3) Size of “habitable zone”: region in which a planet of the right size could have ...
Supernovae March 23 − Supernova 1987A
... • Gas expelled in 1054AD, still glowing • Other SN • 1572 Tycho • 1604 Kepler ...
... • Gas expelled in 1054AD, still glowing • Other SN • 1572 Tycho • 1604 Kepler ...
PHYS 390 Lecture 31 - Kinematics of galaxies 31
... Galaxies assume a variety of shapes, but certainly one of the more common shapes is a spiral or pinwheel: ...
... Galaxies assume a variety of shapes, but certainly one of the more common shapes is a spiral or pinwheel: ...
10 New Constellations
... The number next to each star is its apparent magnitude, its brightness from our point of view on Earth, the lower the number the brighter the star in the night sky. Alkaid Also known as Eta Ursae Majoris, Alkaid is a bluish-white main sequence star with surface temperatures around 3 times that of th ...
... The number next to each star is its apparent magnitude, its brightness from our point of view on Earth, the lower the number the brighter the star in the night sky. Alkaid Also known as Eta Ursae Majoris, Alkaid is a bluish-white main sequence star with surface temperatures around 3 times that of th ...
AST 105: Introduction to the Solar System HOMEWORK # 3
... Normal air pressure at sea level is 1 bar or 1 atmosphere which is about 14.7 pounds per square inch. A square foot has 144 square inches, so the weight would be 14.7 × 144 = 2117 pounds. 8. If a cloud of cool gas exists between us an a bright continuous light source, what kind of spectrum would we ...
... Normal air pressure at sea level is 1 bar or 1 atmosphere which is about 14.7 pounds per square inch. A square foot has 144 square inches, so the weight would be 14.7 × 144 = 2117 pounds. 8. If a cloud of cool gas exists between us an a bright continuous light source, what kind of spectrum would we ...
Subject- Geography Class- VI Chapter 1
... in large amounts. These celestial bodies are called stars. Some celestial bodies do not have their own heat and light. They are lit by the light of the stars. Such bodies are called planets. The word ‘planet’ comes from the Greek word “Planetai” which means ‘wanderers’. STARS: A star is a huge, brig ...
... in large amounts. These celestial bodies are called stars. Some celestial bodies do not have their own heat and light. They are lit by the light of the stars. Such bodies are called planets. The word ‘planet’ comes from the Greek word “Planetai” which means ‘wanderers’. STARS: A star is a huge, brig ...
12-1 MAIN-SEQUENCE STARS
... system, and mass can flow from one star to the other through the inner Lagrangian point. Close binary stars evolve in complex ways because they can transfer mass from one star to the other. This explains why some binary systems contain a main-sequence star more massive than its giant companion—the A ...
... system, and mass can flow from one star to the other through the inner Lagrangian point. Close binary stars evolve in complex ways because they can transfer mass from one star to the other. This explains why some binary systems contain a main-sequence star more massive than its giant companion—the A ...
III - National Optical Astronomy Observatory
... proposal was selected to receive time (there are always more requests than there is telescope time).They made their observations with the same telescope that you will use when you come to Kitt Peak. This double cluster has been known since antiquity: it is possible to see it without a telescope in a ...
... proposal was selected to receive time (there are always more requests than there is telescope time).They made their observations with the same telescope that you will use when you come to Kitt Peak. This double cluster has been known since antiquity: it is possible to see it without a telescope in a ...
The Southern Winter PDF
... a much greater area than the better-known Horsehead Nebula in Orion (p. 56). The smaller complex of blue and faint yellow reflection clouds in the upper left corner, in the horse’s neck, is known as IC 4601. Adjoining it near the left edge of the image is the faint red outline of the dark cloud Barn ...
... a much greater area than the better-known Horsehead Nebula in Orion (p. 56). The smaller complex of blue and faint yellow reflection clouds in the upper left corner, in the horse’s neck, is known as IC 4601. Adjoining it near the left edge of the image is the faint red outline of the dark cloud Barn ...
pptx
... though fusion has not started eventually fusion reactions turn on in the centre of the young star: it has now reached the main sequence ...
... though fusion has not started eventually fusion reactions turn on in the centre of the young star: it has now reached the main sequence ...
“Crossroads of Astronomy.” Talk about Five Remarkable
... She would examine the photographic plate and call out a letter for each spectrum to an assistant. Annie achieved a rate of more than 3 stars a minute. Annie used Williamina Fleming’s system, rearranged it, and introduced decimal subdivisions. The result was O B A F G K M. “Oh be a fine girl/guy kiss ...
... She would examine the photographic plate and call out a letter for each spectrum to an assistant. Annie achieved a rate of more than 3 stars a minute. Annie used Williamina Fleming’s system, rearranged it, and introduced decimal subdivisions. The result was O B A F G K M. “Oh be a fine girl/guy kiss ...
Measuring the Sky - Physics and Astronomy and more!
... True, they emit light, but it’s not a fluid ...
... True, they emit light, but it’s not a fluid ...
Stars (Ch. 13)
... • At this distance it takes light 4.3 years to travel from this star. In other words the star is 4.3 light years away. • The space shuttle travels 17,500 miles/hour, at this ...
... • At this distance it takes light 4.3 years to travel from this star. In other words the star is 4.3 light years away. • The space shuttle travels 17,500 miles/hour, at this ...
6-Where to Survey - The Challenger Learning Center
... Our galaxy itself collapsed from a cloud of material about 13.2 billion years ago and may be nearly as old as the Universe itself. Nearby we have two smaller galaxies orbiting around us as we orbit in the Local Group of galaxies. Galaxies come in different sizes and shapes. Our Milky Way is a barre ...
... Our galaxy itself collapsed from a cloud of material about 13.2 billion years ago and may be nearly as old as the Universe itself. Nearby we have two smaller galaxies orbiting around us as we orbit in the Local Group of galaxies. Galaxies come in different sizes and shapes. Our Milky Way is a barre ...
STARS
... generate their own energy by nuclear reactions in their super hot cores. This newly released energy flows from the stars’ hot interiors to the cooler surface layers, where the energy is radiated into space. We see that radiation and say the stars shine. ...
... generate their own energy by nuclear reactions in their super hot cores. This newly released energy flows from the stars’ hot interiors to the cooler surface layers, where the energy is radiated into space. We see that radiation and say the stars shine. ...
20_LectureOutline
... The helium flash: The pressure within the helium core is almost totally due to “electron degeneracy”—two electrons cannot be in the same quantum state, so the core cannot contract beyond a certain point. This pressure is almost independent of temperature—when the helium starts fusing, the pressure c ...
... The helium flash: The pressure within the helium core is almost totally due to “electron degeneracy”—two electrons cannot be in the same quantum state, so the core cannot contract beyond a certain point. This pressure is almost independent of temperature—when the helium starts fusing, the pressure c ...
Death of the Stars
... If the star has more mass than 1.4 Msun, electron degeneracy pressure is not strong enough against the gravity, so the star collapses rapidly. Electrons fuse with protons to form neutrons and a huge number of neutrinos are generated as a byproduct. The star shrinks until all the electrons and proton ...
... If the star has more mass than 1.4 Msun, electron degeneracy pressure is not strong enough against the gravity, so the star collapses rapidly. Electrons fuse with protons to form neutrons and a huge number of neutrinos are generated as a byproduct. The star shrinks until all the electrons and proton ...
Corvus (constellation)
Corvus is a small constellation in the Southern Celestial Hemisphere. Its name comes from the Latin word ""raven"" or ""crow"". It includes only 11 stars with brighter than 4.02 magnitudes. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations. The four brightest stars, Gamma, Delta, Epsilon, and Beta Corvi from a distinctive quadrilateral in the night sky. The young star Eta Corvi has been found to have two debris disks.