Lives and Deaths of Stars (middle school)
... Outer layers expand due to radiation pressure from a hot core • Surface temperature drops by a factor of ~ 2 • The radius increases by a factor of ~ 100 • Luminosity increases ~ R2 T4 ~ 100-1000 times ...
... Outer layers expand due to radiation pressure from a hot core • Surface temperature drops by a factor of ~ 2 • The radius increases by a factor of ~ 100 • Luminosity increases ~ R2 T4 ~ 100-1000 times ...
Astronomy
... The star is now in the “prime of its life”; it is in equilibrium. Over time; temp, luminosity, color change. Our sun is in the main sequence phase It will live for about 10 billion years Our sun is now about 4.6 billion years old – Links: ...
... The star is now in the “prime of its life”; it is in equilibrium. Over time; temp, luminosity, color change. Our sun is in the main sequence phase It will live for about 10 billion years Our sun is now about 4.6 billion years old – Links: ...
Ay123 Fall 2011 STELLAR STRUCTURE AND EVOLUTION Problem Set 1
... e. Write down an explicit expression for the total gravitational potential energy of this toy star, and verify that the virial theorem is exactly satisfied. Be sure to discuss matter with a general equation of state, not just an ideal monatomic nonrelativistic gas. 2. The Kelvin-Helmholtz timescale: ...
... e. Write down an explicit expression for the total gravitational potential energy of this toy star, and verify that the virial theorem is exactly satisfied. Be sure to discuss matter with a general equation of state, not just an ideal monatomic nonrelativistic gas. 2. The Kelvin-Helmholtz timescale: ...
Note
... • You want to detect the faint star of an unresolved binary system comprising a B5V star and an M0V companion. What wavelength regime would you choose to try to detect the M0V star? What is the ratio of the flux from the B star to the flux from the M star at that wavelength? • You want to detect the ...
... • You want to detect the faint star of an unresolved binary system comprising a B5V star and an M0V companion. What wavelength regime would you choose to try to detect the M0V star? What is the ratio of the flux from the B star to the flux from the M star at that wavelength? • You want to detect the ...
a description of planets and stars you may see
... third-largest member of the Local Group of galaxies, which includes the Milky Way Galaxy, the Andromeda Galaxy. It is one of the most distant permanent objects that can be viewed with the naked eye. The Ring nebula (also known as M57) is a planetary nebula is located in the constellation of Lyra. It ...
... third-largest member of the Local Group of galaxies, which includes the Milky Way Galaxy, the Andromeda Galaxy. It is one of the most distant permanent objects that can be viewed with the naked eye. The Ring nebula (also known as M57) is a planetary nebula is located in the constellation of Lyra. It ...
Stars - Weebly
... – Very large, massive stars burn their fuel much faster than smaller stars – Their main sequence may last only a few hundred thousand years – Smaller stars will live on for billions of years because they burn their fuel much more slowly ...
... – Very large, massive stars burn their fuel much faster than smaller stars – Their main sequence may last only a few hundred thousand years – Smaller stars will live on for billions of years because they burn their fuel much more slowly ...
Life Cycle of Stars
... than about three times that of the Sun, it will collapse so completely that it will literally disappear from the universe. What is left behind is an intense region of gravity called a black hole ...
... than about three times that of the Sun, it will collapse so completely that it will literally disappear from the universe. What is left behind is an intense region of gravity called a black hole ...
Uniqueness of the Earth, Lebo, 7-30
... two or more stars would make stable planetary orbits impossible. If no star (planet was thrown out of planetary system) there would be no energy source. Must be a G-type star: If hotter, UV would extinguish life: If cooler, would have to be so close that tidal effects of the star on the planet would ...
... two or more stars would make stable planetary orbits impossible. If no star (planet was thrown out of planetary system) there would be no energy source. Must be a G-type star: If hotter, UV would extinguish life: If cooler, would have to be so close that tidal effects of the star on the planet would ...
SAMPLE TEST: Stars and Galaxies Multiple Choice Identify the letter
... 47. The most basic way to measure the distance to a star is ____________________. 48. A light-year is the distance ____________________ travels in a year. 49. Apparent magnitude refers to a star’s ____________________ as it appears from ____________________. 50. Some stars, called _________________ ...
... 47. The most basic way to measure the distance to a star is ____________________. 48. A light-year is the distance ____________________ travels in a year. 49. Apparent magnitude refers to a star’s ____________________ as it appears from ____________________. 50. Some stars, called _________________ ...
Uniqueness of the Earth, Lebo, 7-30
... two or more stars would make stable planetary orbits impossible. If no star (planet was thrown out of planetary system) there would be no energy source. Must be a G-type star: If hotter, UV would extinguish life: If cooler, would have to be so close that tidal effects of the star on the planet would ...
... two or more stars would make stable planetary orbits impossible. If no star (planet was thrown out of planetary system) there would be no energy source. Must be a G-type star: If hotter, UV would extinguish life: If cooler, would have to be so close that tidal effects of the star on the planet would ...
HR DIAGRAM ACTIVITY
... You can check your HR diagram at: http://deskarati.com/wp-content/uploads/2012/03/HertzsprungRussell-Diagram.jpg 1. Draw a circle around all the red giants on your graph and label this enclosed area Red Giants. 2. Draw a circle around all the white dwarfs and label this enclosed area White Dwarfs. 3 ...
... You can check your HR diagram at: http://deskarati.com/wp-content/uploads/2012/03/HertzsprungRussell-Diagram.jpg 1. Draw a circle around all the red giants on your graph and label this enclosed area Red Giants. 2. Draw a circle around all the white dwarfs and label this enclosed area White Dwarfs. 3 ...
Stellar Evolution
... again allowing the core to become hot enough to fuse heavier and heavier elements until they reach iron. When this occurs the star doesn’t have enough energy to further fuse iron so gravity quickly crushes the star, causing the protons and electrons to combine and become neutrons. At this moment, th ...
... again allowing the core to become hot enough to fuse heavier and heavier elements until they reach iron. When this occurs the star doesn’t have enough energy to further fuse iron so gravity quickly crushes the star, causing the protons and electrons to combine and become neutrons. At this moment, th ...
THE STAR - physics.udel.edu
... contemporaneous Persian figure.[2] The two other notably bright stars in Cassiopeia are both variable stars. Gamma Cassiopeiae is a shell star, a type of variable star that has a very high rate of rotation. This causes the star to be somewhat unstable and periodically eject rings of material. ...
... contemporaneous Persian figure.[2] The two other notably bright stars in Cassiopeia are both variable stars. Gamma Cassiopeiae is a shell star, a type of variable star that has a very high rate of rotation. This causes the star to be somewhat unstable and periodically eject rings of material. ...
Formation of the Universe Test Review Packet
... 14. In the hypothesis “If we increase the amount of salt in our salt solution by 10g, then the size of the crystals formed will increase” identify the Independent and Dependent variables. IV: DV: 15. In the hypothesis above, which variable is QUANTIFIED? ...
... 14. In the hypothesis “If we increase the amount of salt in our salt solution by 10g, then the size of the crystals formed will increase” identify the Independent and Dependent variables. IV: DV: 15. In the hypothesis above, which variable is QUANTIFIED? ...
Stellar Evolution and the HR Diagram – Study Guide
... 13. White dwarfs are about the size of __Earth (planets)__ . 14. Neutron stars are about ___12__ miles in diameter. 15. Our Sun is a G2___ class star. 16. The MOST massive of stars live (the longest or the shortest) lives. 17. Supernovas are produced by the explosion of _super massive__ stars. The r ...
... 13. White dwarfs are about the size of __Earth (planets)__ . 14. Neutron stars are about ___12__ miles in diameter. 15. Our Sun is a G2___ class star. 16. The MOST massive of stars live (the longest or the shortest) lives. 17. Supernovas are produced by the explosion of _super massive__ stars. The r ...
Ch. 27.3 Star Groups
... Patterns of stars in the sky, in which the stars are not necessarily close together. 88 constellations recognized by astronomers. Most don’t look like the figures they are named after. ...
... Patterns of stars in the sky, in which the stars are not necessarily close together. 88 constellations recognized by astronomers. Most don’t look like the figures they are named after. ...
30-2 Directed Reading
... b. stays on the main sequence for about 10 billion years. c. stays on the main sequence for about 14 billion years. d. stays on the main sequence for about 100 billion years. LEAVING THE MAIN SEQUENCE ...
... b. stays on the main sequence for about 10 billion years. c. stays on the main sequence for about 14 billion years. d. stays on the main sequence for about 100 billion years. LEAVING THE MAIN SEQUENCE ...
The Life Cycle of Stars
... exhausted its ability to fuse other elements like carbon and oxygen, it will become a red giant and expand in size to envelope the Earth. And surprisingly, the larger the mass of the star, the quicker it burns its fuel sources and the shorter its lifespan. Also see and read about Hubble Space Telesc ...
... exhausted its ability to fuse other elements like carbon and oxygen, it will become a red giant and expand in size to envelope the Earth. And surprisingly, the larger the mass of the star, the quicker it burns its fuel sources and the shorter its lifespan. Also see and read about Hubble Space Telesc ...
Life Cycle of a Star
... Within the range of this spectrum, there are yellow or orange stars (like our sun which is a G star) and white stars. White stars contain mostly green emissions but since green is in the middle of the color spectrum, they blend together and the color we see is white. Sadly there are no green stars. ...
... Within the range of this spectrum, there are yellow or orange stars (like our sun which is a G star) and white stars. White stars contain mostly green emissions but since green is in the middle of the color spectrum, they blend together and the color we see is white. Sadly there are no green stars. ...
NOVAE and SUPERNOVAE
... Occur only in stars whose masses are greater than 8 M. At the end of its life, massive stars form an iron core by fusing silicon. The iron core forms in a few days. Fusion ends at this point. The core has a mass of about 2 M. The iron core cannot support itself and collapses, from a size of ...
... Occur only in stars whose masses are greater than 8 M. At the end of its life, massive stars form an iron core by fusing silicon. The iron core forms in a few days. Fusion ends at this point. The core has a mass of about 2 M. The iron core cannot support itself and collapses, from a size of ...
Planet found in nearest star system to Earth » Astronautical News
... Alpha Centauri B is very similar to the Sun but slightly smaller and less bright. The newly discovered planet, with a mass of a little more than that of the Earth, is orbiting about six million kilometres away from the star, much closer than Mercury is to the Sun in the Solar System. The orbit of th ...
... Alpha Centauri B is very similar to the Sun but slightly smaller and less bright. The newly discovered planet, with a mass of a little more than that of the Earth, is orbiting about six million kilometres away from the star, much closer than Mercury is to the Sun in the Solar System. The orbit of th ...
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.