Life Cycle of a Star
... • Red giant- very bright, once an average star, but is now close to end of life - Has expanded to many times its original size (heat causes it to expand) - Hydrogen core has turned to helium and eventually to carbon - Our sun will become a red giant star in about 5 billion years ...
... • Red giant- very bright, once an average star, but is now close to end of life - Has expanded to many times its original size (heat causes it to expand) - Hydrogen core has turned to helium and eventually to carbon - Our sun will become a red giant star in about 5 billion years ...
the universe
... methods to see if there is life on planets other than the Earth. Space probes are space craft that can visit other planets without the need for astronauts. Some of the missions undertaken by such craft include: -Viking 1 and Viking 2 - landed on Mars in the 1970s, took photographs and analysed soil ...
... methods to see if there is life on planets other than the Earth. Space probes are space craft that can visit other planets without the need for astronauts. Some of the missions undertaken by such craft include: -Viking 1 and Viking 2 - landed on Mars in the 1970s, took photographs and analysed soil ...
the universe
... methods to see if there is life on planets other than the Earth. Space probes are space craft that can visit other planets without the need for astronauts. Some of the missions undertaken by such craft include: -Viking 1 and Viking 2 - landed on Mars in the 1970s, took photographs and analysed soil ...
... methods to see if there is life on planets other than the Earth. Space probes are space craft that can visit other planets without the need for astronauts. Some of the missions undertaken by such craft include: -Viking 1 and Viking 2 - landed on Mars in the 1970s, took photographs and analysed soil ...
The classification of stellar spectra
... but some don’t (e.g., the Sun) - some show strong lines of Ca, Fe, Na - some show lines from molecules such as TiO, MgH ...
... but some don’t (e.g., the Sun) - some show strong lines of Ca, Fe, Na - some show lines from molecules such as TiO, MgH ...
Unit 1
... – Radiation carries away energy in regions where the photons are not readily absorbed by stellar gas – Close to the cores of massive stars, there is enough material to impede the flow of energy through radiation ...
... – Radiation carries away energy in regions where the photons are not readily absorbed by stellar gas – Close to the cores of massive stars, there is enough material to impede the flow of energy through radiation ...
AST 207 Homework 7 Due 4 November 2011
... c. (3 pts.) You ask the student to write an essay on how the platinum nucleus got from that environment into the nose ring. What are essential elements of the essay? 2. Mizar, the first binary star discovered from the spectrum. Even though Mizar appears to be a single star, Pickering’s spectrum show ...
... c. (3 pts.) You ask the student to write an essay on how the platinum nucleus got from that environment into the nose ring. What are essential elements of the essay? 2. Mizar, the first binary star discovered from the spectrum. Even though Mizar appears to be a single star, Pickering’s spectrum show ...
Unit 1 - UW Madison Astronomy Department
... • c. Helium burning is taking place in a spherical shell just outside the core. • d. hydrogen burning is taking place in a spherical shell, while the core has not yet started thermonuclear reactions and still mostly hydrogen. ...
... • c. Helium burning is taking place in a spherical shell just outside the core. • d. hydrogen burning is taking place in a spherical shell, while the core has not yet started thermonuclear reactions and still mostly hydrogen. ...
The Birth of Stars Guiding Questions • Because stars shine by
... and incorporated into a later stellar generation ...
... and incorporated into a later stellar generation ...
Star Birth
... – Does not contain the required mass to develop the necessary pressure and temperature to start H-burning - end up as Brown Dwarfs - Low luminosity & low temp. They occupy the bottom right corner of the main sequence. ...
... – Does not contain the required mass to develop the necessary pressure and temperature to start H-burning - end up as Brown Dwarfs - Low luminosity & low temp. They occupy the bottom right corner of the main sequence. ...
answer key
... What do the letters O B A F G K M on an H-R diagram stand for? This is the Harvard system for spectral classification (i.e. temp & color, The modern Morgan-Keegan system adds L, T & Y after M). The letters are ordered strangely because they are relics from a late-1800s system that sorted stars by nu ...
... What do the letters O B A F G K M on an H-R diagram stand for? This is the Harvard system for spectral classification (i.e. temp & color, The modern Morgan-Keegan system adds L, T & Y after M). The letters are ordered strangely because they are relics from a late-1800s system that sorted stars by nu ...
Polaris
... Polaris science. The single point of light that we see as Polaris is actually a triple star system, or three stars orbiting a common center of mass. The primary star, Polaris A, is a supergiant with about six times the mass of our sun. A close companion, Polaris Ab, orbits 2 billion miles from Polar ...
... Polaris science. The single point of light that we see as Polaris is actually a triple star system, or three stars orbiting a common center of mass. The primary star, Polaris A, is a supergiant with about six times the mass of our sun. A close companion, Polaris Ab, orbits 2 billion miles from Polar ...
neutron star - Livonia Public Schools
... • Only 10 percent of the known galaxies have irregular shapes and are classified as irregular galaxies. • In addition to shape and size, one of the major differences among different types of galaxies is the age of their stars. Irregular galaxies contain young stars. ...
... • Only 10 percent of the known galaxies have irregular shapes and are classified as irregular galaxies. • In addition to shape and size, one of the major differences among different types of galaxies is the age of their stars. Irregular galaxies contain young stars. ...
EVOLUTION OF A SOLAR
... The Life and Death of a Sun-like Star These notes describe the evolutionary path taken by a Sun-like star, one with an initial mass comparable to the Sun’s mass. Stars can be thought of as a series of nested shells, surrounding a core. The core is more dense, hotter, and at higher pressure than the ...
... The Life and Death of a Sun-like Star These notes describe the evolutionary path taken by a Sun-like star, one with an initial mass comparable to the Sun’s mass. Stars can be thought of as a series of nested shells, surrounding a core. The core is more dense, hotter, and at higher pressure than the ...
Chapter 12 Stellar Evolution
... Which of the following are old stars with no current nuclear reactions? A. red giants B. main sequence stars C. white dwarfs D. proto stars ...
... Which of the following are old stars with no current nuclear reactions? A. red giants B. main sequence stars C. white dwarfs D. proto stars ...
The Fate of Massive Stars
... increased opacity due to presence of various Ions (including Fe) in stellar atmosphere Diagonal upper-luminosity cutoff that is temperature dependent Hotter --> Higher Luminosity cutoff Greater mass-loss/stellar winds for cooler stars at lower luminosities Stellar winds important contribution to ISM ...
... increased opacity due to presence of various Ions (including Fe) in stellar atmosphere Diagonal upper-luminosity cutoff that is temperature dependent Hotter --> Higher Luminosity cutoff Greater mass-loss/stellar winds for cooler stars at lower luminosities Stellar winds important contribution to ISM ...
Wednesday, April 17 - Otterbein University
... – If a star is actually closer than 10pc, its absolute magnitude will be a bigger number, i.e. it is intrinsically dimmer than it appears – If a star is farther than 10pc, its absolute magnitude will be a smaller number, i.e. it is intrinsically brighter than it appears ...
... – If a star is actually closer than 10pc, its absolute magnitude will be a bigger number, i.e. it is intrinsically dimmer than it appears – If a star is farther than 10pc, its absolute magnitude will be a smaller number, i.e. it is intrinsically brighter than it appears ...
Ursa Minor
Ursa Minor (Latin: ""Smaller She-Bear"", contrasting with Ursa Major), also known as the Little Bear, is a constellation in the northern sky. Like the Great Bear, the tail of the Little Bear may also be seen as the handle of a ladle, hence the name Little Dipper. It was one of the 48 constellations listed by the 2nd-century astronomer Ptolemy, and remains one of the 88 modern constellations. Ursa Minor has traditionally been important for navigation, particularly by mariners, due to Polaris being the North Star.Polaris, the brightest star in the constellation, is a yellow-white supergiant and the brightest Cepheid variable star in the night sky, ranging from apparent magnitude 1.97 to 2.00. Beta Ursae Minoris, also known as Kochab, is an aging star that has swollen and cooled to become an orange giant with an apparent magnitude of 2.08, only slightly fainter than Polaris. Kochab and magnitude 3 Gamma Ursae Minoris have been called the ""guardians of the pole star"". Planets have been detected orbiting four of the stars, including Kochab. The constellation also contains an isolated neutron star—Calvera—and H1504+65, the hottest white dwarf yet discovered with a surface temperature of 200,000 K.