Day_39
... • Read the instructions and questions carefully. • Discuss the concepts and your answers with one another. Take time to understand it now!!!! • Come to a consensus answer you both agree on and write complete thoughts into your LT. • If you get stuck or are not sure of your answer, ...
... • Read the instructions and questions carefully. • Discuss the concepts and your answers with one another. Take time to understand it now!!!! • Come to a consensus answer you both agree on and write complete thoughts into your LT. • If you get stuck or are not sure of your answer, ...
Lecture 9/10 Stellar evolution Ulf Torkelsson 1 Main sequence stars
... supernova, which is characterised by a spectrum with strong hydrogen lines. (There are also type I supernovae that lack hydrogen lines.) It is expected that a few supernovae will occur per century in the Milky Way, but in practice only four have been observed during the last 1000 years. The reason f ...
... supernova, which is characterised by a spectrum with strong hydrogen lines. (There are also type I supernovae that lack hydrogen lines.) It is expected that a few supernovae will occur per century in the Milky Way, but in practice only four have been observed during the last 1000 years. The reason f ...
Stellar Evolution Review
... 12-9. We see an emission nebula via a) reflected blue light from a nearby star. b) blue light emitted by hot (excited) hydrogen atoms. c) red light emitted by hot (excited) hydrogen atoms. d) reflected red light from a nearby star. ...
... 12-9. We see an emission nebula via a) reflected blue light from a nearby star. b) blue light emitted by hot (excited) hydrogen atoms. c) red light emitted by hot (excited) hydrogen atoms. d) reflected red light from a nearby star. ...
Answers
... 5. Look at the pie chart tab: a. In which stage of its life will the Sun spend most of its time? Main Sequence b. How long will it spend in this stage? 8992.81 Myr 6. Look at the mass tab: What happens to the mass of the Sun as it gets older? It decreases 7. What type of star will the Sun be at the ...
... 5. Look at the pie chart tab: a. In which stage of its life will the Sun spend most of its time? Main Sequence b. How long will it spend in this stage? 8992.81 Myr 6. Look at the mass tab: What happens to the mass of the Sun as it gets older? It decreases 7. What type of star will the Sun be at the ...
Whiteq
... masses of 0.98, 0.44, 0.65 solar masses respectively. The masses of other white dwarves have been estimated by theoretical models. The most massive are about 1.2 solar masses. The least massive are about 0.2 solar masses. The densities of white dwarves are, of course, very high. Sirius B has a densi ...
... masses of 0.98, 0.44, 0.65 solar masses respectively. The masses of other white dwarves have been estimated by theoretical models. The most massive are about 1.2 solar masses. The least massive are about 0.2 solar masses. The densities of white dwarves are, of course, very high. Sirius B has a densi ...
Constituents of the Milky Way
... However, globular clusters are found all across the sky, not just in that narrow band, so they must have a spherical distribution surrounding the disk, called a halo. ...
... However, globular clusters are found all across the sky, not just in that narrow band, so they must have a spherical distribution surrounding the disk, called a halo. ...
Emission and Absorption Spectra
... • Powerful thing about the thermal radiation from dense objects: it ONLY depends on the temperature, nothing else! • Over most of the range of temperatures of stars, thermal radiation means that stars have different colors when looked at in visible light • Remember, relation between color and temper ...
... • Powerful thing about the thermal radiation from dense objects: it ONLY depends on the temperature, nothing else! • Over most of the range of temperatures of stars, thermal radiation means that stars have different colors when looked at in visible light • Remember, relation between color and temper ...
Stars and Light
... Brightness of stars • 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 assigned a number for the magnit ...
... Brightness of stars • 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 assigned a number for the magnit ...
Astronomy and the Coal Age of Alabama
... The first reason is that the Milky Way does not rotate as a solid body would. Relative patterns on a solid object are maintained as the object rotates. In the Milky Way, stars farther from the center take longer to go around than stars closer in. Also, orbits are generally not closed. This changes ...
... The first reason is that the Milky Way does not rotate as a solid body would. Relative patterns on a solid object are maintained as the object rotates. In the Milky Way, stars farther from the center take longer to go around than stars closer in. Also, orbits are generally not closed. This changes ...
Name: Astronomy Lab: The Hertzsprung-Russell (H
... Sometimes the student of astronomy starts to become overwhelmed trying to understand the many measurements and observations astronomers make. Data concerning distance, brightness, color, spectral class, mass, temperature, motion, etc. all seem to be gathered in an attempt to impress the student with ...
... Sometimes the student of astronomy starts to become overwhelmed trying to understand the many measurements and observations astronomers make. Data concerning distance, brightness, color, spectral class, mass, temperature, motion, etc. all seem to be gathered in an attempt to impress the student with ...
Luminosity and brightness
... (b) the distance of the star from the observer on the Earth If we have two stars of the same luminosity with one star double the distance of the other from the Earth the closer star will look four times brighter. It obeys the inverse square law. The photograph shows the Pleiades star cluster. The br ...
... (b) the distance of the star from the observer on the Earth If we have two stars of the same luminosity with one star double the distance of the other from the Earth the closer star will look four times brighter. It obeys the inverse square law. The photograph shows the Pleiades star cluster. The br ...
Fulltext PDF
... The stars of a galaxy distribute themselves into broadly three components, viz. – disc, halo, and bulge (Figure 1). The halo is made up of an older population of stars that constitute globular clusters. Globular clusters are made up of low metallicity, dense aggregates of 50,000–100,000 stars, gravi ...
... The stars of a galaxy distribute themselves into broadly three components, viz. – disc, halo, and bulge (Figure 1). The halo is made up of an older population of stars that constitute globular clusters. Globular clusters are made up of low metallicity, dense aggregates of 50,000–100,000 stars, gravi ...
Chapter 1 Section Misconception Truth Distances in the Universe
... the core. All the light we see comes from the photosphere; the core is well hidden below hundreds of thousands of kilometers of solar gas. The absorption lines and the continuum are both formed in the photosphere; the fact that absorption lines are detected shows that the outer part o ...
... the core. All the light we see comes from the photosphere; the core is well hidden below hundreds of thousands of kilometers of solar gas. The absorption lines and the continuum are both formed in the photosphere; the fact that absorption lines are detected shows that the outer part o ...
PPT
... • The overall range of stellar masses runs from 0.08 times the mass of the Sun to about 150 times the mass of the Sun. • Masses are only known for stars that form binary systems, but about half of all stars are in fact in binary systems! – 0.08 MSun is approximately 80 MJupiter ...
... • The overall range of stellar masses runs from 0.08 times the mass of the Sun to about 150 times the mass of the Sun. • Masses are only known for stars that form binary systems, but about half of all stars are in fact in binary systems! – 0.08 MSun is approximately 80 MJupiter ...
Ursa Major
Ursa Major /ˈɜrsə ˈmeɪdʒər/ (also known as the Great Bear and Charles' Wain) is a constellation in the northern celestial hemisphere. One of the 48 constellations listed by Ptolemy (second century AD), it remains one of the 88 modern constellations. It can be visible throughout the year in most of the northern hemisphere. Its name, Latin for ""the greater (or larger) she-bear"", stands as a reference to and in direct contrast with Ursa Minor, ""the smaller she-bear"", with which it is frequently associated in mythology and amateur astronomy. The constellation's most recognizable asterism, a group of seven relatively bright stars commonly known as the ""Big Dipper"", ""the Wagon"" or ""the Plough"" (among others), both mimicks the shape of the lesser bear (the ""Little Dipper"") and is commonly used as a navigational pointer towards the current northern pole star, Polaris in Ursa Minor. The Big Dipper and the constellation as a whole have mythological significance in numerous world cultures, usually as a symbol of the north.The third largest constellation in the sky, Ursa Major is home to many deep-sky objects including seven Messier objects, four other NGC objects and I Zwicky 18, the youngest known galaxy in the visible universe.