Birth and Life of a Star
... used and the star starts to ‘burn’ Helium this has greater radiant forces and so the outer layers expand to form a red giant. One and a half billion years later, the surface of the star is 3.3 times the size it is now, and its temperature about 4300 degrees. ...
... used and the star starts to ‘burn’ Helium this has greater radiant forces and so the outer layers expand to form a red giant. One and a half billion years later, the surface of the star is 3.3 times the size it is now, and its temperature about 4300 degrees. ...
HOMEWORK #1
... By studying the spectrum of primary star, we know its mass and radius are 3.6 MSun and 3.2 RSun relative to our Sun. Use the lightcurve to determine the speed of the companion star and its orbital period (P). Calculate the semi-major axis (a) and total mass via Kepler’s Third Law. What is the mass ...
... By studying the spectrum of primary star, we know its mass and radius are 3.6 MSun and 3.2 RSun relative to our Sun. Use the lightcurve to determine the speed of the companion star and its orbital period (P). Calculate the semi-major axis (a) and total mass via Kepler’s Third Law. What is the mass ...
HOMEWORK #1
... By studying the spectrum of primary star, we know its mass and radius are 3.6 MSun and 3.2 RSun relative to our Sun. Use the lightcurve to determine the speed of the companion star and its orbital period (P). Calculate the semi-major axis (a) and total mass via Kepler’s Third Law. What is the mass ...
... By studying the spectrum of primary star, we know its mass and radius are 3.6 MSun and 3.2 RSun relative to our Sun. Use the lightcurve to determine the speed of the companion star and its orbital period (P). Calculate the semi-major axis (a) and total mass via Kepler’s Third Law. What is the mass ...
Stars are classified according to their color
... • Stars are classified according to their color temperature: ...
... • Stars are classified according to their color temperature: ...
1 Sep: 6.13am BST 15 Sep: 6.43am BST 30 Sep: 7.14am BST
... Looking southwest the sky is dominated by the constellations of Cygnus (the Swan), Lyra (the Lyre) and Aquila (the Eagle) whose brightest stars of Deneb, Vega and Altair respectively make up the Summer Triangle. The Swan’s beak is marked by Albireo and halfway between Albireo and Altair is Sagitta ( ...
... Looking southwest the sky is dominated by the constellations of Cygnus (the Swan), Lyra (the Lyre) and Aquila (the Eagle) whose brightest stars of Deneb, Vega and Altair respectively make up the Summer Triangle. The Swan’s beak is marked by Albireo and halfway between Albireo and Altair is Sagitta ( ...
Physics 1025: Lecture 18 Stellar Magnitudes, Absolute Magnitudes
... For example, consider two stars differing in magnitude by 13 magnitudes (e.g. m 1 = 20 and m2 = 7) magnitude diff. Δm = 13 = 5 + 5 +3 so brightness ratio = (100) x (100) x 16 = 160,000 and thus the m = 7 star is 160,000 times brighter than the m = 20 star. Now there are problems with visual magnitud ...
... For example, consider two stars differing in magnitude by 13 magnitudes (e.g. m 1 = 20 and m2 = 7) magnitude diff. Δm = 13 = 5 + 5 +3 so brightness ratio = (100) x (100) x 16 = 160,000 and thus the m = 7 star is 160,000 times brighter than the m = 20 star. Now there are problems with visual magnitud ...
Astronomy Assignment #1
... To account for giant planets in very close non-circular high-eccentricity orbits one might hypothesize that two Jovain planets in the outer part of the nebula had a close encounter – not a collision, but a near miss. Simulations indicate that two jovian planets approaching within 1 AU of each other ...
... To account for giant planets in very close non-circular high-eccentricity orbits one might hypothesize that two Jovain planets in the outer part of the nebula had a close encounter – not a collision, but a near miss. Simulations indicate that two jovian planets approaching within 1 AU of each other ...
PHYSICS 113 Practice Questions #2
... d. the remnant of a star that exploded several thousand years ago e. an illusion caused by activity in the Earth's upper atmosphere 14. When a star settles down to a stable existence as a main-sequence star, what characteristics determines where on the main sequence in an H-R d iagram the star will ...
... d. the remnant of a star that exploded several thousand years ago e. an illusion caused by activity in the Earth's upper atmosphere 14. When a star settles down to a stable existence as a main-sequence star, what characteristics determines where on the main sequence in an H-R d iagram the star will ...
Unit 60 to 79
... 6) For a white dwarf to become a nova it is necessary for it to a. Have a companion star (be a member of a binary) b. Exceed its Chandrasekhar limit c. Have begun life as a high-mass star d. Continue the fusion cycle until its core is completely composed of iron 7) Which of the following events wil ...
... 6) For a white dwarf to become a nova it is necessary for it to a. Have a companion star (be a member of a binary) b. Exceed its Chandrasekhar limit c. Have begun life as a high-mass star d. Continue the fusion cycle until its core is completely composed of iron 7) Which of the following events wil ...
monkeyball_lifecycleofastar
... atoms which gives it the Bright red color. When this happens in billions Of years if there are still Humans, all life will be fried. ...
... atoms which gives it the Bright red color. When this happens in billions Of years if there are still Humans, all life will be fried. ...
Calculating Main Sequence Lifetimes
... Since ancient times, the brightness of a star is indicated by "magnitudes": 1, 2 and so on, with dim stars having larger magnitudes. Don’t confuse the relative magnitude with absolute magnitude. The relative magnitude measures the brightness of a star as it appears in the sky and it depends on the b ...
... Since ancient times, the brightness of a star is indicated by "magnitudes": 1, 2 and so on, with dim stars having larger magnitudes. Don’t confuse the relative magnitude with absolute magnitude. The relative magnitude measures the brightness of a star as it appears in the sky and it depends on the b ...
Cetus and Lepus
... The most notable star in Cetus is Mira ("the Wonderful"), designated Omicron Ceti, the first variable star to be discovered and the prototype of its class. Over a period of 332 days it reaches a maximum apparent magnitude of 3 - visible to the naked eye - and dips to a minimum magnitude of 10, invis ...
... The most notable star in Cetus is Mira ("the Wonderful"), designated Omicron Ceti, the first variable star to be discovered and the prototype of its class. Over a period of 332 days it reaches a maximum apparent magnitude of 3 - visible to the naked eye - and dips to a minimum magnitude of 10, invis ...
Lecture 19: Low
... • Continue with life of a lowlow-mass star (like the Sun) after exhausting H in core -- post MS • Red giant (RG I) phase, with H shell burning • Helium flash goes off in shrinking degenerate core: horizontal branch star with He core burning • Double shell burning (H and He) yields red supergiant (RG ...
... • Continue with life of a lowlow-mass star (like the Sun) after exhausting H in core -- post MS • Red giant (RG I) phase, with H shell burning • Helium flash goes off in shrinking degenerate core: horizontal branch star with He core burning • Double shell burning (H and He) yields red supergiant (RG ...
11.1 Stars - St John Brebeuf
... It is estimated there are more stars in the universe than there are grains of sand on all the beaches on Earth. By peering through the interstellar matter (dust and gases), astronomers can observe the birth of stars. ...
... It is estimated there are more stars in the universe than there are grains of sand on all the beaches on Earth. By peering through the interstellar matter (dust and gases), astronomers can observe the birth of stars. ...
the lab handout here
... How does the temperature and luminosity of the Sun compare to that of the other stars on the Main Sequence? ________________________________________________________ ...
... How does the temperature and luminosity of the Sun compare to that of the other stars on the Main Sequence? ________________________________________________________ ...
Problem Sheet for Introduction to Astrophysics
... a) If you could stand on the event horizon of a one-solar-mass black hole (M=1.991030 kg), what is the tidal force acting on you? (Assume your weight is 70kg and your height is 2 m) b) If you could stand on the event horizon of a 109 solar mass black hole, what is the tidal force acting on you (the ...
... a) If you could stand on the event horizon of a one-solar-mass black hole (M=1.991030 kg), what is the tidal force acting on you? (Assume your weight is 70kg and your height is 2 m) b) If you could stand on the event horizon of a 109 solar mass black hole, what is the tidal force acting on you (the ...
Earth Science: Chapter 7: Stellar Evolution: Spring 2017: Student
... Greater than 20 Less than 10 million years Same as above except the mass is great enough to solar masses form a BLACK HOLE (see below) Planetary nebula: after a red giant forms material from the star is ejected and forms what looks like a nebula. The name planetary is actually misnamed by an early a ...
... Greater than 20 Less than 10 million years Same as above except the mass is great enough to solar masses form a BLACK HOLE (see below) Planetary nebula: after a red giant forms material from the star is ejected and forms what looks like a nebula. The name planetary is actually misnamed by an early a ...
Integrative Studies 410 Our Place in the Universe
... measure the distance to Andromeda (about 2 million ly) • Works best for periodic variables ...
... measure the distance to Andromeda (about 2 million ly) • Works best for periodic variables ...
After Dark in Allenspark
... Because 1 billion mph/1 thousand mph = 1 million = mass of Ed/mass of planet). So, to find the planet, you look at the light from the star. When the star moves toward us, the light from the star is shifted slightly to the blue, and when it moves away, the light's shifted slightly to the red. Looking ...
... Because 1 billion mph/1 thousand mph = 1 million = mass of Ed/mass of planet). So, to find the planet, you look at the light from the star. When the star moves toward us, the light from the star is shifted slightly to the blue, and when it moves away, the light's shifted slightly to the red. Looking ...
Star Jeopardy "Review #1
... Type G2 star, middle of HR diagram-average size and luminosity, end of life will be white dwarf, only known star to support a planet with life. Why is our star (the sun) frequently referred to as an “average” star? Compare the important physical characteristics of the Sun with the most common types ...
... Type G2 star, middle of HR diagram-average size and luminosity, end of life will be white dwarf, only known star to support a planet with life. Why is our star (the sun) frequently referred to as an “average” star? Compare the important physical characteristics of the Sun with the most common types ...
The Hidden Lives of Galaxies NSTA 2001
... The Beginning of the End: Red Giants After Hydrogen is exhausted in core ... Energy released from nuclear fusion counter-acts inward force of gravity. ...
... The Beginning of the End: Red Giants After Hydrogen is exhausted in core ... Energy released from nuclear fusion counter-acts inward force of gravity. ...
The Life Cycle of a Star
... The Sun’s Death • Since the Sun is considerably smaller it will not explode in a supernova. • Instead it is predicted that it will become a red giant in about ~6 billion years. • When this occurs, all the water on earth will be vaporized and life will cease to exist. • In the final phase the Sun wi ...
... The Sun’s Death • Since the Sun is considerably smaller it will not explode in a supernova. • Instead it is predicted that it will become a red giant in about ~6 billion years. • When this occurs, all the water on earth will be vaporized and life will cease to exist. • In the final phase the Sun wi ...
1. absolute brightness -
... to their spectral characteristics. • They are classified according to the spectral lines observed, originally the amount of Hydrogen the lines seemed to indicate. • Today they are ranked in order of surface temperature. O, B, A, F, G, K, M from hottest to coolest. ...
... to their spectral characteristics. • They are classified according to the spectral lines observed, originally the amount of Hydrogen the lines seemed to indicate. • Today they are ranked in order of surface temperature. O, B, A, F, G, K, M from hottest to coolest. ...
Lyra
Lyra (/ˈlaɪərə/; Latin for lyre, from Greek λύρα) is a small constellation. It is one of 48 listed by the 2nd century astronomer Ptolemy, and is one of the 88 constellations recognized by the International Astronomical Union. Lyra was often represented on star maps as a vulture or an eagle carrying a lyre, and hence sometimes referred to as Aquila Cadens or Vultur Cadens. Beginning at the north, Lyra is bordered by Draco, Hercules, Vulpecula, and Cygnus. Lyra is visible from the northern hemisphere from spring through autumn, and nearly overhead, in temperate latitudes, during the summer months. From the southern hemisphere, it is visible low in the northern sky during the winter months.The lucida or brightest star—and one of the brightest stars in the sky—is the white main sequence star Vega, a corner of the Summer Triangle. Beta Lyrae is the prototype of a class of stars known as Beta Lyrae variables, binary stars so close to each other that they become egg-shaped and material flows from one to the other. Epsilon Lyrae, known informally as the Double Double, is a complex multiple star system. Lyra also hosts the Ring Nebula, the second-discovered and best-known planetary nebula.