Name - MIT
... 31) The helium fusion process that will occur in the lifetime of a Star with a mass similar to the Sun converts … A) four helium nuclei into one carbon nucleus plus energy B) four helium nuclei into two carbon nucleus plus energy C) two helium nuclei into one carbon nucleus plus energy D) three heli ...
... 31) The helium fusion process that will occur in the lifetime of a Star with a mass similar to the Sun converts … A) four helium nuclei into one carbon nucleus plus energy B) four helium nuclei into two carbon nucleus plus energy C) two helium nuclei into one carbon nucleus plus energy D) three heli ...
Name
... 30) The helium fusion process that will occur in the lifetime of a Star with a mass similar to the Sun converts … A) four helium nuclei into one carbon nucleus plus energy B) four helium nuclei into two carbon nucleus plus energy C) two helium nuclei into one carbon nucleus plus energy D) two helium ...
... 30) The helium fusion process that will occur in the lifetime of a Star with a mass similar to the Sun converts … A) four helium nuclei into one carbon nucleus plus energy B) four helium nuclei into two carbon nucleus plus energy C) two helium nuclei into one carbon nucleus plus energy D) two helium ...
Name - MIT
... 31) The helium fusion process that will occur in the lifetime of a Star with a mass similar to the Sun converts … A) four helium nuclei into one carbon nucleus plus energy B) four helium nuclei into two carbon nucleus plus energy C) two helium nuclei into one carbon nucleus plus energy D) three heli ...
... 31) The helium fusion process that will occur in the lifetime of a Star with a mass similar to the Sun converts … A) four helium nuclei into one carbon nucleus plus energy B) four helium nuclei into two carbon nucleus plus energy C) two helium nuclei into one carbon nucleus plus energy D) three heli ...
Teaching Text Structure with Understanding the Scale of the Universe
... By 1920, many scientists began to think that some of the objects they were seeing must be other galaxies like the Milky Way but separate from the Milky Way. They spoke of these separate clusters of stars as island universes. ...
... By 1920, many scientists began to think that some of the objects they were seeing must be other galaxies like the Milky Way but separate from the Milky Way. They spoke of these separate clusters of stars as island universes. ...
The “Life” of Non-living Stars - Etiwanda E
... universe can be learned by studying stars and galaxies and their evolution. Understanding the properties of stars provides us with an understanding of our sun, which is a star! The properties of the sun affect Earth directly, so it is important to know them. ...
... universe can be learned by studying stars and galaxies and their evolution. Understanding the properties of stars provides us with an understanding of our sun, which is a star! The properties of the sun affect Earth directly, so it is important to know them. ...
Distance Ladder
... •Typically 300 km/s or so How to to determine distances: is moving away from us at •Measure v using Doppler shift 2100 km/s? A) 1 Mly D) 484 Mly •Deduce the distance from: B) 10 Mly E) 4,840 Mly v = H0d C) 100 Mly F) 48,400 Mly ...
... •Typically 300 km/s or so How to to determine distances: is moving away from us at •Measure v using Doppler shift 2100 km/s? A) 1 Mly D) 484 Mly •Deduce the distance from: B) 10 Mly E) 4,840 Mly v = H0d C) 100 Mly F) 48,400 Mly ...
Oct 06, 2001
... C) It is a shell of gas ejected from a star late in its life. D) It is what is left when a white dwarf star explodes as a supernova. 8) What makes a high-mass star's core collapse? A) Energy from its outer layers compresses its core. B) The only thing that can make a star's core collapse is a collis ...
... C) It is a shell of gas ejected from a star late in its life. D) It is what is left when a white dwarf star explodes as a supernova. 8) What makes a high-mass star's core collapse? A) Energy from its outer layers compresses its core. B) The only thing that can make a star's core collapse is a collis ...
Lecture02-ASTA01 - University of Toronto
... • For example, Australians see many constellations and asterisms invisible from North America (like Southern Cross), but they never see the Big Dipper. ...
... • For example, Australians see many constellations and asterisms invisible from North America (like Southern Cross), but they never see the Big Dipper. ...
Part 1: If a 10000 K blackbody has a wavelength of peak emission at
... Use the blackbody simulator to get a better feel for this inverse relation and review the material in Module 1 Lecture F. Also, as I said in class, if this inverse relation did not hold then cooler objects would be emitting short wavelength high energy photons which doesn’t make any physical sense b ...
... Use the blackbody simulator to get a better feel for this inverse relation and review the material in Module 1 Lecture F. Also, as I said in class, if this inverse relation did not hold then cooler objects would be emitting short wavelength high energy photons which doesn’t make any physical sense b ...
Stellar Evolution: the Death of Stars
... expel most stellar material outward • Shock wave produces a series of nuclear reaction, the only place elements heavier than iron (such as silver, gold) are produced in the universe ...
... expel most stellar material outward • Shock wave produces a series of nuclear reaction, the only place elements heavier than iron (such as silver, gold) are produced in the universe ...
constellations are not real!
... logarithmically, so each increase in 5 magnitudes corresponds to a decrease in brightness by a factor 100. The absolute magnitude is the magnitude the stars would have if viewed from a distance of 10 parsecs or some 32.6 light years. Obviously, Deneb is intrinsically very bright to make this list fr ...
... logarithmically, so each increase in 5 magnitudes corresponds to a decrease in brightness by a factor 100. The absolute magnitude is the magnitude the stars would have if viewed from a distance of 10 parsecs or some 32.6 light years. Obviously, Deneb is intrinsically very bright to make this list fr ...
Sirius Astronomer - Orange County Astronomers
... both the winds and jets. Changing conditions must determine whether winds or jets are produced. Spitzer and Herschel (infrared space telescopes) have spotted young stars in the Orion nebula heating and cooling over time periods shorter than expected. Infrared penetrates the gas and dust surrounding ...
... both the winds and jets. Changing conditions must determine whether winds or jets are produced. Spitzer and Herschel (infrared space telescopes) have spotted young stars in the Orion nebula heating and cooling over time periods shorter than expected. Infrared penetrates the gas and dust surrounding ...
Star Life Cycle Web Activity
... only. Read this entire page. You may go to the other sections if you have time. An H-R diagram shows a wide array of stars plotted on a graph showing absolute magnitude (or luminosity) versus surface temperature (not core temperature). Notice most of the stars are in the main sequence, yet some are ...
... only. Read this entire page. You may go to the other sections if you have time. An H-R diagram shows a wide array of stars plotted on a graph showing absolute magnitude (or luminosity) versus surface temperature (not core temperature). Notice most of the stars are in the main sequence, yet some are ...
The Milky Way`s Restless Swarms of Stars
... Majewski’s group sees tidal streams from Sagittarius wrapping clear around the Milky Way. However, several of the dwarf’s globular clusters will outlast this dissolution for billions of years.The Milky Way’s largest globular cluster, Omega Centauri, might be the core of a dwarf galaxy whose outer pa ...
... Majewski’s group sees tidal streams from Sagittarius wrapping clear around the Milky Way. However, several of the dwarf’s globular clusters will outlast this dissolution for billions of years.The Milky Way’s largest globular cluster, Omega Centauri, might be the core of a dwarf galaxy whose outer pa ...
Distance, Size, and Temperature of a Star
... Because blue stars are large, and compact, they burn their fuel quickly, which gives them a very high temperature. These stars often run out of fuel in only 10,000 - 100,000 years. A blue giant is very bright. Like a lighthouse, they shine across a great distance. Even though blue giant stars are ra ...
... Because blue stars are large, and compact, they burn their fuel quickly, which gives them a very high temperature. These stars often run out of fuel in only 10,000 - 100,000 years. A blue giant is very bright. Like a lighthouse, they shine across a great distance. Even though blue giant stars are ra ...
100 Binocular Deep Sky Objects
... 663 is fairly good sized, but the other two are small and one of them is quite faint. Two more cluster lie very nearby, M103 and Tr1. All are visible in 10x50, although Tr1 is tiny. Even in a 10x60, 659 needs good skies. It has no stars brighter than mag 10.4. 654 is barely seen as nonstellar and 66 ...
... 663 is fairly good sized, but the other two are small and one of them is quite faint. Two more cluster lie very nearby, M103 and Tr1. All are visible in 10x50, although Tr1 is tiny. Even in a 10x60, 659 needs good skies. It has no stars brighter than mag 10.4. 654 is barely seen as nonstellar and 66 ...
Stars, Constellations, and Quasars
... Great Bear), which includes the Big Dipper, and Ursa Minor (the Little Bear), which includes the Little Dipper. Polaris, which is also known as the North Star or the Pole Star, is an important star in the handle of Ursa Minor. Polaris takes its name from the fact that Earth’s rotational axis (north ...
... Great Bear), which includes the Big Dipper, and Ursa Minor (the Little Bear), which includes the Little Dipper. Polaris, which is also known as the North Star or the Pole Star, is an important star in the handle of Ursa Minor. Polaris takes its name from the fact that Earth’s rotational axis (north ...
Evolution of a Star
... Once the red giant’s core uses its supply of helium, it contracts even more. As the core runs out of fuel, the outer layers escape into space. This leaves behind the hot dense core. The core contracts under the force of gravity. At this stage in a star’s evolution, it is a white dwarf. A white dwarf ...
... Once the red giant’s core uses its supply of helium, it contracts even more. As the core runs out of fuel, the outer layers escape into space. This leaves behind the hot dense core. The core contracts under the force of gravity. At this stage in a star’s evolution, it is a white dwarf. A white dwarf ...
Masers and high mass star formation Claire Chandler
... – Massive SF: clouds are warmer, larger, more massive, mainly located in spiral arms; high mass stars form in clusters and associations – Low-mass SF: form in a cooler population of clouds throughout the Galactic disk, as well as GMCs, not necessarily in clusters ...
... – Massive SF: clouds are warmer, larger, more massive, mainly located in spiral arms; high mass stars form in clusters and associations – Low-mass SF: form in a cooler population of clouds throughout the Galactic disk, as well as GMCs, not necessarily in clusters ...
D1 Stellar quantities (PPT)
... • Galaxy is a huge group of stars, dust, and gas held together by gravity, often containing billions of stars, measuring many light years across. Some galaxies exist in isolation but the majority of them come in clusters containing from a few dozen to a few thousand members. The Milky Way is part o ...
... • Galaxy is a huge group of stars, dust, and gas held together by gravity, often containing billions of stars, measuring many light years across. Some galaxies exist in isolation but the majority of them come in clusters containing from a few dozen to a few thousand members. The Milky Way is part o ...
How Bright is that star?
... light. Measured in Watts or Solar Units or “Sols” The Absolute magnitude and Luminosity of a star measure the same thing. Absolute Magnitude Approximate Luminosity ...
... light. Measured in Watts or Solar Units or “Sols” The Absolute magnitude and Luminosity of a star measure the same thing. Absolute Magnitude Approximate Luminosity ...
No Slide Title
... increase, spectroscopy showed a 7.8 hr binary system with unseen companion • high orbital velocity shows companion too massive for neutron star • now confirmed as a 11 (+/- 2) solar mass black hole • predicted to flare again in 2033 ...
... increase, spectroscopy showed a 7.8 hr binary system with unseen companion • high orbital velocity shows companion too massive for neutron star • now confirmed as a 11 (+/- 2) solar mass black hole • predicted to flare again in 2033 ...
Searching for stars in high-velocity clouds
... estimated by using gas absorption features in stars presumed to be behind and in front of the clouds (Keenan et al. 1995; van Woerden et al. 1999; Wakker 2001), by using absorption features in distant quasars (Sembach et al. 2002) and by measuring the Hα flux arising from the presumed ionization by ...
... estimated by using gas absorption features in stars presumed to be behind and in front of the clouds (Keenan et al. 1995; van Woerden et al. 1999; Wakker 2001), by using absorption features in distant quasars (Sembach et al. 2002) and by measuring the Hα flux arising from the presumed ionization by ...
Stars: Properties and Classification
... in their cores - this is the defining characteristic of a main sequence star. - more massive stars are more luminous and hotter: L=4πR2 σT4 ...
... in their cores - this is the defining characteristic of a main sequence star. - more massive stars are more luminous and hotter: L=4πR2 σT4 ...
Star formation in galaxies over the last 10 billion
... A long time ago in galaxies far, far away: The HST Ultra Deep Field ...
... A long time ago in galaxies far, far away: The HST Ultra Deep Field ...
Serpens
Serpens (""the Serpent"", Greek Ὄφις) is a constellation of the northern hemisphere. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations defined by the International Astronomical Union. It is unique among the modern constellations in being split into two non-contiguous parts, Serpens Caput (Serpent's Head) to the west and Serpens Cauda (Serpent's Tail) to the east. Between these two halves lies the constellation of Ophiuchus, the ""Serpent-Bearer"". In figurative representations, the body of the serpent is represented as passing behind Ophiuchus between Mu Serpentis in Serpens Caput and Nu Serpentis in Serpens Cauda.The brightest star in Serpens is the red giant star Alpha Serpentis, or Unukalhai, in Serpens Caput, with an apparent magnitude of 2.63. Also located in Serpens Caput are the naked-eye globular cluster Messier 5 and the naked-eye variables R Serpentis and Tau4 Serpentis. Notable extragalactic objects include Seyfert's Sextet, one of the densest galaxy clusters known; Arp 220, the prototypical ultraluminous infrared galaxy; and Hoag's Object, the most famous of the very rare class of galaxies known as ring galaxies.Part of the Milky Way's galactic plane passes through Serpens Cauda, which is therefore rich in galactic deep-sky objects, such as the Eagle Nebula (IC 4703) and its associated star cluster Messier 16. The nebula measures 70 light-years by 50 light-years and contains the Pillars of Creation, three dust clouds that became famous for the image taken by the Hubble Space Telescope. Other striking objects include the Red Square Nebula, one of the few objects in astronomy to take on a square shape; and Westerhout 40, a massive nearby star-forming region consisting of a molecular cloud and an H II region.