Document
... • If you know how luminous a star REALLY is and how bright it looks from Earth, you can determine how far away it must be to look that faint. • For any star in the sky, we KNOW: ...
... • If you know how luminous a star REALLY is and how bright it looks from Earth, you can determine how far away it must be to look that faint. • For any star in the sky, we KNOW: ...
Life on Billions of Planets
... "The Creator must have an inordinate fondness for beetles," the early 20th century biologist J.B.S. Haldane once said. "He made so many of them." If Haldane had been an astronomer, he might have said the same about the nondescript red stars known as M-dwarfs. As the name implies, they're small — no ...
... "The Creator must have an inordinate fondness for beetles," the early 20th century biologist J.B.S. Haldane once said. "He made so many of them." If Haldane had been an astronomer, he might have said the same about the nondescript red stars known as M-dwarfs. As the name implies, they're small — no ...
31-2 - Fremont Peak Observatory
... one should consider this tour to be through the back roads of Scorpius. One can begin this tour of Scorpius at the “Cat’s Eyes.” The Cat’s Eyes, λ and υ-Scorpii, are located at the Scorpion’s stinger on the tail of the scorpion. Lambda-Scorpii, Shaula, is the second brightest star in Scorpius (magni ...
... one should consider this tour to be through the back roads of Scorpius. One can begin this tour of Scorpius at the “Cat’s Eyes.” The Cat’s Eyes, λ and υ-Scorpii, are located at the Scorpion’s stinger on the tail of the scorpion. Lambda-Scorpii, Shaula, is the second brightest star in Scorpius (magni ...
galaxies
... • young stars! only a few million years old • may still be surrounded by nebula from which they formed • located in the spiral arms of a galaxy • example: Pleiades ...
... • young stars! only a few million years old • may still be surrounded by nebula from which they formed • located in the spiral arms of a galaxy • example: Pleiades ...
C:\Documents and Settings\Administrator\Desktop\Lecture 15.wpd
... to the astronomer we need to know how far away a star or galaxy is. Example: If you look at the sky, Sirius is brighter than Betelgeuse. But Betelgeuse is actually 300 times more luminous or brighter than Sirius. That is, Betelgeuse actually emits far more energy than Sirius. The reason is that Bete ...
... to the astronomer we need to know how far away a star or galaxy is. Example: If you look at the sky, Sirius is brighter than Betelgeuse. But Betelgeuse is actually 300 times more luminous or brighter than Sirius. That is, Betelgeuse actually emits far more energy than Sirius. The reason is that Bete ...
PHYS 175 Fall 2014 Final Recitation Ch. 16 The Sun
... Photons released in the core (where fusion takes place) collide almost instantaneously with other core constituents. This energy gradually flows outward, until the density of the sun decreases sufficiently to allow for radiative diffusion of the energy. Again, the photons still undergo many collisio ...
... Photons released in the core (where fusion takes place) collide almost instantaneously with other core constituents. This energy gradually flows outward, until the density of the sun decreases sufficiently to allow for radiative diffusion of the energy. Again, the photons still undergo many collisio ...
ReviewQuestionsForClass
... How do size, temperature, and distance to a star affect its brightness? Which stars on the main sequence are the brightest? Hottest? Biggest? Bluest? Live the longest? What are the different astronomical objects? Comets, nebulae, main sequence stars, red giants, white dwarves, planetary nebulae, bin ...
... How do size, temperature, and distance to a star affect its brightness? Which stars on the main sequence are the brightest? Hottest? Biggest? Bluest? Live the longest? What are the different astronomical objects? Comets, nebulae, main sequence stars, red giants, white dwarves, planetary nebulae, bin ...
Chapter20
... Black Holes at Galactic Centers? Recent results by astronomers using the Hubble Space Telescope now indicate that most - and possibly even all - large galaxies may harbor a black hole. In all the galaxies studied, star speeds continue to increase closer the very center. This indicates a center mill ...
... Black Holes at Galactic Centers? Recent results by astronomers using the Hubble Space Telescope now indicate that most - and possibly even all - large galaxies may harbor a black hole. In all the galaxies studied, star speeds continue to increase closer the very center. This indicates a center mill ...
Handout from Allaire Star Party
... known as planetary nebulae (even though these have nothing to do with planets); the white dwarf is visible at the center of some planetary nebulae. One of the best known planetary nebulae is the Ring Nebula in the constellation Lyra. The Ring Nebula is 57 light years from the Earth and is similar to ...
... known as planetary nebulae (even though these have nothing to do with planets); the white dwarf is visible at the center of some planetary nebulae. One of the best known planetary nebulae is the Ring Nebula in the constellation Lyra. The Ring Nebula is 57 light years from the Earth and is similar to ...
Practice questions for Stars File
... 4. Explain how the energy changes are involved in each of their life cycles from birth to death. 5. Explain how the gravity changes are related to the final stages in the life cycle of large and massive stars. ...
... 4. Explain how the energy changes are involved in each of their life cycles from birth to death. 5. Explain how the gravity changes are related to the final stages in the life cycle of large and massive stars. ...
7a Properties of Stars.pptx
... • Measured in light-‐years – distance light travels in one year (9.5 x 1012 or 9.5 trillion kilometers) ...
... • Measured in light-‐years – distance light travels in one year (9.5 x 1012 or 9.5 trillion kilometers) ...
Cepheus (constellation)
... δ Cephei is the prototype Cepheid variable, a yellow-hued supergiant star 980 light-years from Earth. It was discovered to be variable by John Goodricke in 1784. It varies between 3.5m and 4.4m over a period of 5 days and 9 hours. The Cepheids are a class of pulsating variable stars; Delta Cephei ha ...
... δ Cephei is the prototype Cepheid variable, a yellow-hued supergiant star 980 light-years from Earth. It was discovered to be variable by John Goodricke in 1784. It varies between 3.5m and 4.4m over a period of 5 days and 9 hours. The Cepheids are a class of pulsating variable stars; Delta Cephei ha ...
Cygnus (constellation)
Cygnus /ˈsɪɡnəs/ is a northern constellation lying on the plane of the Milky Way, deriving its name from the Latinized Greek word for swan. The swan is one of the most recognizable constellations of the northern summer and autumn, it features a prominent asterism known as the Northern Cross (in contrast to the Southern Cross). Cygnus was among the 48 constellations listed by the 2nd century astronomer Ptolemy, and it remains one of the 88 modern constellations.Cygnus contains Deneb, one of the brightest stars in the night sky and one corner of the Summer Triangle, as well as some notable X-ray sources and the giant stellar association of Cygnus OB2. One of the stars of this association, NML Cygni, is one of the largest stars currently known. The constellation is also home to Cygnus X-1, a distant X-ray binary containing a supergiant and unseen massive companion that was the first object widely held to be a black hole. Many star systems in Cygnus have known planets as a result of the Kepler Mission observing one patch of the sky, the patch is the area around Cygnus. In addition, most of the eastern part of Cygnus is dominated by the Hercules–Corona Borealis Great Wall, a giant galaxy filament that is the largest known structure in the observable universe; covering most of the northern sky.