Astronomy I Ex.2
... What is the (approximate) age of the universe in Gyr? 3. Convert the following distances in cm to distances in AU: a) Approximate distance from the earth to the sun: 1.44 × 1013 cm b) Approximate distance from the earth to the next nearest star - Alpha Centauri: 3.97 × 1018 cm c) Approximate distanc ...
... What is the (approximate) age of the universe in Gyr? 3. Convert the following distances in cm to distances in AU: a) Approximate distance from the earth to the sun: 1.44 × 1013 cm b) Approximate distance from the earth to the next nearest star - Alpha Centauri: 3.97 × 1018 cm c) Approximate distanc ...
Death of massive stars
... In November 1967, Jocelyn Bell found a new, regular pattern in data from a radio telescope. Originally she and her team suspected they had made the first detection of alien life, and named it LGM 1. What they really found was the first pulsar. ...
... In November 1967, Jocelyn Bell found a new, regular pattern in data from a radio telescope. Originally she and her team suspected they had made the first detection of alien life, and named it LGM 1. What they really found was the first pulsar. ...
Stars & Galaxies
... time than the sun-like stars. • As a supergiant can suddenly explode into a supernova. ...
... time than the sun-like stars. • As a supergiant can suddenly explode into a supernova. ...
August Evening Skies
... double star near Vega in Lyra. The open or galactic star cluster (OCl) known ...
... double star near Vega in Lyra. The open or galactic star cluster (OCl) known ...
What do we see in the night sky - Laureate International College
... together by gravity is called a galaxy. There are billions and billions of galaxies in the universe. Our solar system is located in the ___________________ galaxy. Galaxies also contain masses of _____________. The gas is mainly ____________ atoms. Space dust is made up of ______ ___________________ ...
... together by gravity is called a galaxy. There are billions and billions of galaxies in the universe. Our solar system is located in the ___________________ galaxy. Galaxies also contain masses of _____________. The gas is mainly ____________ atoms. Space dust is made up of ______ ___________________ ...
red giant - Teacher Pages
... has very hot temperatures ii.The inner planets and outer planets are separated by an asteroid belt iii. The great red spot on Jupiter is believed to be a giant storm iv. All of the gaseous outer planets ...
... has very hot temperatures ii.The inner planets and outer planets are separated by an asteroid belt iii. The great red spot on Jupiter is believed to be a giant storm iv. All of the gaseous outer planets ...
Study Guide: Use your notes and handouts to
... 32. What does magnitude of stars really measure? 33. How is apparent magnitude different from absolute magnitude? 34. What is a parallax? What is it used to measure in space? 35. What is a Hertzsprung Russell Diagram? 36. What is on the X axis of a HR Diagram? 37. What is on the Y axis of the HR Dia ...
... 32. What does magnitude of stars really measure? 33. How is apparent magnitude different from absolute magnitude? 34. What is a parallax? What is it used to measure in space? 35. What is a Hertzsprung Russell Diagram? 36. What is on the X axis of a HR Diagram? 37. What is on the Y axis of the HR Dia ...
Evolution and the Big Bang, ET Life Lec. 6, Jan 18, 2002
... Life of a Star • Birth: collapse of gas cloud forms protostar. • Main sequence: center of star becomes hot ...
... Life of a Star • Birth: collapse of gas cloud forms protostar. • Main sequence: center of star becomes hot ...
The Big Bang Theory
... toward an observer is squeezed; its frequency appears to increase and is therefore said to be blueshifted. In contrast, the radiation emitted by an object moving away is stretched or redshifted. Blueshifts and redshifts exhibited by stars, galaxies and gas clouds also indicate their motions with res ...
... toward an observer is squeezed; its frequency appears to increase and is therefore said to be blueshifted. In contrast, the radiation emitted by an object moving away is stretched or redshifted. Blueshifts and redshifts exhibited by stars, galaxies and gas clouds also indicate their motions with res ...
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 ...
The Life Cycles of Stars, Part II
... the name stuck. When the last of the helium atoms in the core are fused into carbon atoms, the star begins to die. Gravity causes the last of the star’s matter to collapse inward and compact. This is the white dwarf stage. At this stage, the star’s matter is extremely dense. White dwarfs shine with ...
... the name stuck. When the last of the helium atoms in the core are fused into carbon atoms, the star begins to die. Gravity causes the last of the star’s matter to collapse inward and compact. This is the white dwarf stage. At this stage, the star’s matter is extremely dense. White dwarfs shine with ...
Star Formation in Lynds Dark Nebulae
... beginning of time (Yan, 05). Dust found in molecular clouds is crucial to the star formation process, as it allows gas to condense into pre-stellar cores and evolve into YSOs, or young stellar objects (Greene, 01). Research by Carballo (1992) identified new candidate YSOs in Scorpio-Centaurus Lupus, ...
... beginning of time (Yan, 05). Dust found in molecular clouds is crucial to the star formation process, as it allows gas to condense into pre-stellar cores and evolve into YSOs, or young stellar objects (Greene, 01). Research by Carballo (1992) identified new candidate YSOs in Scorpio-Centaurus Lupus, ...
Recap: High Mass Stars
... Neutron Star • Star with a core from 1.4 to 3 times the size of the Sun becomes a neutron. • Electrons and neutrons combine into neutrons. • 10 km (6 mi) in diameter with a mass more than our Sun! • A teaspoon of neutron star would be about 10 million tons • Acts like a huge magnet with magnetic p ...
... Neutron Star • Star with a core from 1.4 to 3 times the size of the Sun becomes a neutron. • Electrons and neutrons combine into neutrons. • 10 km (6 mi) in diameter with a mass more than our Sun! • A teaspoon of neutron star would be about 10 million tons • Acts like a huge magnet with magnetic p ...
Astronomy 242: Review Questions #1 Distributed: February 10
... (a) What is the distance d to Canopus? Include an estimate of the uncertainty in d. (b) How fast is Canopus moving with respect to the Sun? (c) What is the absolute bolometric magnitude Mbol of Canopus? (d) Given that the Sun has absolute bolometric magnitude Mbol,⊙ = 4.74, what is the bolometric lu ...
... (a) What is the distance d to Canopus? Include an estimate of the uncertainty in d. (b) How fast is Canopus moving with respect to the Sun? (c) What is the absolute bolometric magnitude Mbol of Canopus? (d) Given that the Sun has absolute bolometric magnitude Mbol,⊙ = 4.74, what is the bolometric lu ...
Lives of Stars - Madison County Schools
... outshine the entire galaxy (300,000,000,000 stars) it was in. Supernovae can be seen from Earth. There are historic records of some stars that were so bright that they could be seen during the day for weeks at a time. ...
... outshine the entire galaxy (300,000,000,000 stars) it was in. Supernovae can be seen from Earth. There are historic records of some stars that were so bright that they could be seen during the day for weeks at a time. ...
PoA Examples Sheet 3
... the frequency integrated power per unit volume depends on temperature. 5. The photospheric temperature of an optically thick accretion disc varies with radius as T ∝ R−3/4 . Explain why you expect the spectrum of the radiation produced by each annulus to be of black body form. Write down an integral ...
... the frequency integrated power per unit volume depends on temperature. 5. The photospheric temperature of an optically thick accretion disc varies with radius as T ∝ R−3/4 . Explain why you expect the spectrum of the radiation produced by each annulus to be of black body form. Write down an integral ...
Lecture course problems
... The microwave spectrum of an interstellar gas cloud has been recorded in the region containing CO transitions. The observed intensity ratio R(1)/R(0) for the first two lines from the R branch of the CO rotational spectrum is 1.10. Calculate the temperature of the cloud. ...
... The microwave spectrum of an interstellar gas cloud has been recorded in the region containing CO transitions. The observed intensity ratio R(1)/R(0) for the first two lines from the R branch of the CO rotational spectrum is 1.10. Calculate the temperature of the cloud. ...
Chapter22_New
... I like to use the subject of the size and shape of the galaxy as an example of the way that science often proceeds by fits and starts with some wrong turns. I treat the work of Herschel and Kapteyn, though basically wrong, with respect. 3. The Rotation of the Milky Way Rotation curves for other gala ...
... I like to use the subject of the size and shape of the galaxy as an example of the way that science often proceeds by fits and starts with some wrong turns. I treat the work of Herschel and Kapteyn, though basically wrong, with respect. 3. The Rotation of the Milky Way Rotation curves for other gala ...
Homework Problems for Quiz 1 – AY 5 – Spring 2013
... b) what are the relative brightnesses of the two stars? ...
... b) what are the relative brightnesses of the two stars? ...
Powerpoint of lecture 3
... and constant volume, we can find (see blackboard) an integral expression for the total internal energy, U. • Using Theorem II, if is constant throughout the star, we can then prove the Virial Theorem: ...
... and constant volume, we can find (see blackboard) an integral expression for the total internal energy, U. • Using Theorem II, if is constant throughout the star, we can then prove the Virial Theorem: ...
Yes, we are all star dust. Even Gary!
... Stars condense from “birthing” nebulae and die as “funerary” nebulae. The “life steps” taken depend on the mass of the star: 0.1 – 1.4 solar masses = condense, main sequence star of Hertzprung-Russell Diagram (ie like our Sun). Core condenses and outer layers expand to a giant star, possible nebula, ...
... Stars condense from “birthing” nebulae and die as “funerary” nebulae. The “life steps” taken depend on the mass of the star: 0.1 – 1.4 solar masses = condense, main sequence star of Hertzprung-Russell Diagram (ie like our Sun). Core condenses and outer layers expand to a giant star, possible nebula, ...
Star formation
Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as ""stellar nurseries"" or ""star-forming regions"", collapse to form stars. As a branch of astronomy, star formation includes the study of the interstellar medium (ISM) and giant molecular clouds (GMC) as precursors to the star formation process, and the study of protostars and young stellar objects as its immediate products. It is closely related to planet formation, another branch of astronomy. Star formation theory, as well as accounting for the formation of a single star, must also account for the statistics of binary stars and the initial mass function.In June 2015, astronomers reported evidence for Population III stars in the Cosmos Redshift 7 galaxy at z = 6.60. Such stars are likely to have existed in the very early universe (i.e., at high redshift), and may have started the production of chemical elements heavier than hydrogen that are needed for the later formation of planets and life as we know it.