Analyzing Spectra
... black lines are caused by elements in the star's atmosphere. As light emitted from a star passes through the star's atmosphere, some of it is absorbed by elements in the atmosphere. The wavelengths of the light that are absorbed appear as dark lines in the spectrum. Each element absorbs certain wave ...
... black lines are caused by elements in the star's atmosphere. As light emitted from a star passes through the star's atmosphere, some of it is absorbed by elements in the atmosphere. The wavelengths of the light that are absorbed appear as dark lines in the spectrum. Each element absorbs certain wave ...
Ch.1, Sec.3 - Mapping the Stars
... When you put those numbers together, you get an estimate of 1024 stars in the entire Universe or a 1 followed by 24 zeroes (called one septillion)! That’s 1,000,000,000,000,000,000,000,000 stars or more than all the combined grains of sand on planet Earth!!!! ...
... When you put those numbers together, you get an estimate of 1024 stars in the entire Universe or a 1 followed by 24 zeroes (called one septillion)! That’s 1,000,000,000,000,000,000,000,000 stars or more than all the combined grains of sand on planet Earth!!!! ...
3 - MrFuglestad
... Black Hole - If a star is super massive a neutron star never forms because the pressure from inward falling material is too great. It becomes a Black Hole. This an area in space that appears dark becomes it does not emit any electromagnetic radiation (light). If any objects get near it they are “suc ...
... Black Hole - If a star is super massive a neutron star never forms because the pressure from inward falling material is too great. It becomes a Black Hole. This an area in space that appears dark becomes it does not emit any electromagnetic radiation (light). If any objects get near it they are “suc ...
review
... massive stars can continue to transform the nuclei of elements such as carbon, oxygen, etc. into heavier nuclei AND also generate excess energy, up to a limit beyond which no further energy-producing reactions can occur. The element that is produced when this limit is reached is • A. silicon. • B. o ...
... massive stars can continue to transform the nuclei of elements such as carbon, oxygen, etc. into heavier nuclei AND also generate excess energy, up to a limit beyond which no further energy-producing reactions can occur. The element that is produced when this limit is reached is • A. silicon. • B. o ...
life cycle of stars notes
... • Hotter core causes star to expand up to 100x original size due to ‘radiative pressure’ • Surface temp gets cooler – star becomes red • Core becomes “degenerate” - can’t be crushed ...
... • Hotter core causes star to expand up to 100x original size due to ‘radiative pressure’ • Surface temp gets cooler – star becomes red • Core becomes “degenerate” - can’t be crushed ...
E3 – Stellar distances
... • At distances greater than Mpc, neither parallax nor spectroscopic parallax can be relied upon to measure the distance to a star. • When we observe another galaxy, all of the stars in that galaxy are approximately the same distance away from the earth. What we really need is a light source of known ...
... • At distances greater than Mpc, neither parallax nor spectroscopic parallax can be relied upon to measure the distance to a star. • When we observe another galaxy, all of the stars in that galaxy are approximately the same distance away from the earth. What we really need is a light source of known ...
Lecture 13
... Example of estimating stellar radii The nearby star 'Sirius A' has a surface temperature T~10,000 K and a flux of arriving radiation at Earth (integrated over all wavelengths) of : F = 1.2 x 107 W/m2 From measurement of parallax, the distance is r = 2.64 pc = ...
... Example of estimating stellar radii The nearby star 'Sirius A' has a surface temperature T~10,000 K and a flux of arriving radiation at Earth (integrated over all wavelengths) of : F = 1.2 x 107 W/m2 From measurement of parallax, the distance is r = 2.64 pc = ...
Stellar Evolution – Test Review Answers
... The greater the mass of a main-sequence star, the greater its luminosity (and also the greater its radius and surface temperature). In other words, stars that are higher up (brighter) on the main sequence are more massive, larger, and hotter. 19. Describe the beginning of a star’s life. The birth of ...
... The greater the mass of a main-sequence star, the greater its luminosity (and also the greater its radius and surface temperature). In other words, stars that are higher up (brighter) on the main sequence are more massive, larger, and hotter. 19. Describe the beginning of a star’s life. The birth of ...
Star Quiz - Sue Ryder
... • Advertise your quiz well, using email and posters in communal areas and at the venue. • In preparation for the big night print out enough copies of the questions for everyone taking part - but remember, don’t include the answers! • Make sure you have plenty of help on the night; you will need some ...
... • Advertise your quiz well, using email and posters in communal areas and at the venue. • In preparation for the big night print out enough copies of the questions for everyone taking part - but remember, don’t include the answers! • Make sure you have plenty of help on the night; you will need some ...
File
... notation. This is 4.22 light years (4.22 ly). A light year is the distance that light travels in one year. (equaling 9.46 x 1012 km). Book analogy: If the Sun is a pinhead, the next star is another pinhead 35 miles away. This shows that the universe is made mostly of empty space. ...
... notation. This is 4.22 light years (4.22 ly). A light year is the distance that light travels in one year. (equaling 9.46 x 1012 km). Book analogy: If the Sun is a pinhead, the next star is another pinhead 35 miles away. This shows that the universe is made mostly of empty space. ...
Today`s Powerpoint
... Some protostars not massive (< 0.08 MSun) enough to begin fusion. These are Brown Dwarfs or failed stars. Very difficult to detect because so faint. First seen in 1994 with Palomar 200”. How many are there? ...
... Some protostars not massive (< 0.08 MSun) enough to begin fusion. These are Brown Dwarfs or failed stars. Very difficult to detect because so faint. First seen in 1994 with Palomar 200”. How many are there? ...
friends of the planetarium newsletter
... found in the Large Magellanic Cloud, a neighboring galaxy that is 165,000 light-years away. Astronomers found several stars with scorching hot surface temperatures of over 39,700 degrees Celsius, which is more than seven times hotter than the sun. The stars are also tens of times larger and several ...
... found in the Large Magellanic Cloud, a neighboring galaxy that is 165,000 light-years away. Astronomers found several stars with scorching hot surface temperatures of over 39,700 degrees Celsius, which is more than seven times hotter than the sun. The stars are also tens of times larger and several ...
The power plant of the Sun and stars
... Visual binaries…you can see them as two stars in a telescope Like Albireo, Sirius, Nu Draconis Alpha Geminorum: Castor ...
... Visual binaries…you can see them as two stars in a telescope Like Albireo, Sirius, Nu Draconis Alpha Geminorum: Castor ...
Dim Stars - granthamkuehl
... Stars come in a range of sizes and masses. Our Sun is a mediumsized star. The largest stars, giant stars have a mass of about 60 times the mass of the Sun. ...
... Stars come in a range of sizes and masses. Our Sun is a mediumsized star. The largest stars, giant stars have a mass of about 60 times the mass of the Sun. ...
A small mass difference between Hydrogen and Helium The
... can often determine the radius of the orbit, and orbital speeds, and thus the masses of the stars From observations of binaries, we have the masses Of a sample of stars, and can study how stellar Properties depend on mass. ...
... can often determine the radius of the orbit, and orbital speeds, and thus the masses of the stars From observations of binaries, we have the masses Of a sample of stars, and can study how stellar Properties depend on mass. ...
Star Life Cycle Powerpoin
... • When a massive Red Giant fuses all of the helium into carbon, fusion stops and the outer layers collapse on the core. ...
... • When a massive Red Giant fuses all of the helium into carbon, fusion stops and the outer layers collapse on the core. ...
Oct 06, 2001
... This is a” thinking” question: Star A appears brighter than Star B, but Star A actually gives off less energy than Star B. The apparent magnitude and absolute magnitudes for Star A are m = 1 and M = -2, respectively. Use this information to answer the following two questions. 13) Which of the follow ...
... This is a” thinking” question: Star A appears brighter than Star B, but Star A actually gives off less energy than Star B. The apparent magnitude and absolute magnitudes for Star A are m = 1 and M = -2, respectively. Use this information to answer the following two questions. 13) Which of the follow ...
Tour the sky`s reddest stars
... know it as Herschel’s Garnet Star. As the prototype of a class of variable stars called Mu Cephei variables, this star swings between magnitudes 3.6 and 5 during a period of roughly 2 years. These numbers, however, give only its apparent brightness. In reality, Mu ranks as one of the brightest and l ...
... know it as Herschel’s Garnet Star. As the prototype of a class of variable stars called Mu Cephei variables, this star swings between magnitudes 3.6 and 5 during a period of roughly 2 years. These numbers, however, give only its apparent brightness. In reality, Mu ranks as one of the brightest and l ...
Lec12
... squeezed as they move into spiral arms 2. Squeezing of clouds triggers star formation 3. Young stars flow out of spiral arms ...
... squeezed as they move into spiral arms 2. Squeezing of clouds triggers star formation 3. Young stars flow out of spiral arms ...
The H-R Diagram
... The Main Sequence: The main sequence goes from the upper left to the lower right. The stars at the upper left are hotter, larger, and more massive than the Sun. The Sun is near with an absolute magnitude of MV=+5 and a spectral type G2. Like all m.s. stars it is of luminosity class V. Those stars to ...
... The Main Sequence: The main sequence goes from the upper left to the lower right. The stars at the upper left are hotter, larger, and more massive than the Sun. The Sun is near with an absolute magnitude of MV=+5 and a spectral type G2. Like all m.s. stars it is of luminosity class V. Those stars to ...
Stars: flux, luminosity, color, and temperature
... • The brightness of a star is a measure of its flux. • Ptolemy (150 A.D.) grouped stars into 6 `magnitude’ groups according to how bright they looked to his eye. • Herschel (1800s) first measured the brightness of stars quantitatively and matched his measurements onto Ptolemy’s magnitude groups and ...
... • The brightness of a star is a measure of its flux. • Ptolemy (150 A.D.) grouped stars into 6 `magnitude’ groups according to how bright they looked to his eye. • Herschel (1800s) first measured the brightness of stars quantitatively and matched his measurements onto Ptolemy’s magnitude groups and ...
Chap 11 Characterizing Stars v2
... Several stars in and around the constellation Orion labeled with their names and apparent magnitudes. ...
... Several stars in and around the constellation Orion labeled with their names and apparent magnitudes. ...
Lecture 5
... Binary Stars • Binary stars, in which two stars are held in orbit • around each other by their mutual gravitational attraction, are surprisingly common • Those that can be resolved into two distinct star images by an Earth-based telescope are called visual binaries • Each of the two stars in a bina ...
... Binary Stars • Binary stars, in which two stars are held in orbit • around each other by their mutual gravitational attraction, are surprisingly common • Those that can be resolved into two distinct star images by an Earth-based telescope are called visual binaries • Each of the two stars in a bina ...
Perseus (constellation)
Perseus, named after the Greek mythological hero Perseus, is a constellation in the northern sky. It was one of 48 listed by the 2nd-century astronomer Ptolemy and among the 88 modern constellations defined by the International Astronomical Union (IAU). It is located in the northern celestial hemisphere near several other constellations named after legends surrounding Perseus, including Andromeda to the west and Cassiopeia to the north. Perseus is also bordered by Aries and Taurus to the south, Auriga to the east, Camelopardalis to the north, and Triangulum to the west.The galactic plane of the Milky Way passes through Perseus but is mostly obscured by molecular clouds. The constellation's brightest star is the yellow-white supergiant Alpha Persei (also called Mirfak), which shines at magnitude 1.79. It and many of the surrounding stars are members of an open cluster known as the Alpha Persei Cluster. The best-known star, however, is Algol (Beta Persei), linked with ominous legends because of its variability, which is noticeable to the naked eye. Rather than being an intrinsically variable star, it is an eclipsing binary. Other notable star systems in Perseus include X Persei, a binary system containing a neutron star, and GK Persei, a nova that peaked at magnitude 0.2 in 1901. The Double Cluster, comprising two open clusters quite near each other in the sky, was known to the ancient Chinese. The constellation gives its name to the Perseus Cluster (Abell 426), a massive galaxy cluster located 250 million light-years from Earth. It hosts the radiant of the annual Perseids meteor shower—one of the most prominent meteor showers in the sky.