origin of the Solar System
... Upon ejection into interstellar space from dying stars, some elements condense into dust grains (presolar grains) and amorphous dust, either in stellar atmospheres or in interstellar space. Gas and dust collect into giant, cold molecular clouds. Dense cores collapse into stars, such as the Sun 4.56 ...
... Upon ejection into interstellar space from dying stars, some elements condense into dust grains (presolar grains) and amorphous dust, either in stellar atmospheres or in interstellar space. Gas and dust collect into giant, cold molecular clouds. Dense cores collapse into stars, such as the Sun 4.56 ...
Presentation (PowerPoint File)
... Problem: How do stars form--by gravitational collapse, gravitational accretion, or stellar mergers? Prospect: May require more computer power to resolve this, since calculation of formation of even one star is a challenge. Problem: How do massive stars form in the face of radiation pressure? ...
... Problem: How do stars form--by gravitational collapse, gravitational accretion, or stellar mergers? Prospect: May require more computer power to resolve this, since calculation of formation of even one star is a challenge. Problem: How do massive stars form in the face of radiation pressure? ...
Introduction to Astronomy
... • Also faintly visible at other wavelengths • A few hundred are now known • What are they? Rapidly spinning neutron stars, whose strong magnetic fields accelerate plasma to produce the beam of radio waves ...
... • Also faintly visible at other wavelengths • A few hundred are now known • What are they? Rapidly spinning neutron stars, whose strong magnetic fields accelerate plasma to produce the beam of radio waves ...
12.4 Evolution of Stars More Massive than the Sun
... flash. The star expands into a red giant as the core continues to collapse. The envelope blows off, leaving a white dwarf to gradually cool. • Nova results from material accreting onto a white dwarf from a companion star ...
... flash. The star expands into a red giant as the core continues to collapse. The envelope blows off, leaving a white dwarf to gradually cool. • Nova results from material accreting onto a white dwarf from a companion star ...
The Life Cycle of a Star
... outer layers, creating nebulae and a white dwarf forms from the core. • If it is of high mass, death occurs in a massive explosion known as a supernova, the remaining core then transforms into a neutron star or a black hole. ...
... outer layers, creating nebulae and a white dwarf forms from the core. • If it is of high mass, death occurs in a massive explosion known as a supernova, the remaining core then transforms into a neutron star or a black hole. ...
document
... holes. Black holes are incredibly dense objects with such high gravity that not even light can escape from them, if it gets too close. This artist’s drawing shows one possible black hole, called Cygnus X-1. Gas from the large star at the right is falling onto a disk around the black hole at the left ...
... holes. Black holes are incredibly dense objects with such high gravity that not even light can escape from them, if it gets too close. This artist’s drawing shows one possible black hole, called Cygnus X-1. Gas from the large star at the right is falling onto a disk around the black hole at the left ...
Stellar Remnants White Dwarfs, Neutron Stars & Black Holes
... White Dwarfs • composed mainly of Carbon & Oxygen • formed from stars that are no more than 8 Solar masses • White Dwarfs can be no more than 1.4 Solar masses and have diameters about the size of the Earth (1/100 the diameter of the Sun). • If a White Dwarf is in a binary system and close enough to ...
... White Dwarfs • composed mainly of Carbon & Oxygen • formed from stars that are no more than 8 Solar masses • White Dwarfs can be no more than 1.4 Solar masses and have diameters about the size of the Earth (1/100 the diameter of the Sun). • If a White Dwarf is in a binary system and close enough to ...
This link is in pdf format for ease of reading
... consequence of the total amount of its mass. Stars with only small amounts of material (a few tenths the mass of our Sun) become cool "red dwarfs" that live for many billions of years. Stars with the mass of our Sun last for about 10 billion years. Giant stars, with a few tens of the mass of our Sun ...
... consequence of the total amount of its mass. Stars with only small amounts of material (a few tenths the mass of our Sun) become cool "red dwarfs" that live for many billions of years. Stars with the mass of our Sun last for about 10 billion years. Giant stars, with a few tens of the mass of our Sun ...
Lecture 02a: Setting a context for us in the Universe
... Truly distant galaxies are rushing away from us at speeds approaching the speed of light! ...
... Truly distant galaxies are rushing away from us at speeds approaching the speed of light! ...
life cycle of stars notes
... 2. Heat from new fusion causes 2nd red giant phase – Red Supergiant. 3. After Fe, fusion must stop. Core collapses and gets degenerate ...
... 2. Heat from new fusion causes 2nd red giant phase – Red Supergiant. 3. After Fe, fusion must stop. Core collapses and gets degenerate ...
ppt
... in consequence of its attraction, allow any of its rays to arrive at us; it is therefore possible that the largest luminous bodies in the universe may, through this cause, be invisible.” ...
... in consequence of its attraction, allow any of its rays to arrive at us; it is therefore possible that the largest luminous bodies in the universe may, through this cause, be invisible.” ...
Problem set 2
... The star Proxima Centauri, probably bound gravitationally to α Centauri (α Cen), is a small main-sequence star of mass 0.123 solar. Using the empirical scaling between the mass and luminosity from the textbook, and between mass and radius (you can assume it’s linear, R ∼ M), compute Proxima’s effect ...
... The star Proxima Centauri, probably bound gravitationally to α Centauri (α Cen), is a small main-sequence star of mass 0.123 solar. Using the empirical scaling between the mass and luminosity from the textbook, and between mass and radius (you can assume it’s linear, R ∼ M), compute Proxima’s effect ...
Problem Set 3 Solutions Problem 1: D
... Both clouds must be at their respective p Jeans lengths in order to just barely be able to collapse. The Jeans length goes as λJ ∝ T /ρ, so if they are the same temperature, then the cloud with the shorter √ Jeans length has a higher density. This cloud also has a shorter free-fall time tf f ∼ 1/ Gρ ...
... Both clouds must be at their respective p Jeans lengths in order to just barely be able to collapse. The Jeans length goes as λJ ∝ T /ρ, so if they are the same temperature, then the cloud with the shorter √ Jeans length has a higher density. This cloud also has a shorter free-fall time tf f ∼ 1/ Gρ ...
ASTR2050 Spring 2005 •
... Suppose this energy was turned into heat? How hot would this make the Sun? (Make a rough guess.) Consider thermal kinetic energies of particles in the Sun: ...
... Suppose this energy was turned into heat? How hot would this make the Sun? (Make a rough guess.) Consider thermal kinetic energies of particles in the Sun: ...
ppt document
... A star like the sun will last about 10 billion years on the Main Sequence. A star with 15 times the mass of the sun will only last about 10 million years on the Main Sequence. In the same way, stars with less mass then the sun will stay on the main sequence much longer than 10 billion years. ...
... A star like the sun will last about 10 billion years on the Main Sequence. A star with 15 times the mass of the sun will only last about 10 million years on the Main Sequence. In the same way, stars with less mass then the sun will stay on the main sequence much longer than 10 billion years. ...
Stars - PAMS-Doyle
... • The nearest galaxy to ours is called the "Sagittarius Dwarf" and it is about 60 000 light years away from our own galaxy (the Milky Way). Assuming we can get a vehicle to reach the speed of light, it would take 60 000 years for a vehicle to travel to this galaxy. • Given current technology, it is ...
... • The nearest galaxy to ours is called the "Sagittarius Dwarf" and it is about 60 000 light years away from our own galaxy (the Milky Way). Assuming we can get a vehicle to reach the speed of light, it would take 60 000 years for a vehicle to travel to this galaxy. • Given current technology, it is ...
Stars & Galaxies
... Spiral Galaxy • Spiral arms w/ a bulge in the center. • Milky Way is a spiral galaxy ...
... Spiral Galaxy • Spiral arms w/ a bulge in the center. • Milky Way is a spiral galaxy ...
Mars Project
... All star start their lives as a dense part of a nebula. (A big cloud of gas and dust spread out in space.) in the dense part of the nebula the gas and dust becomes so dense and hot that a star is born. ...
... All star start their lives as a dense part of a nebula. (A big cloud of gas and dust spread out in space.) in the dense part of the nebula the gas and dust becomes so dense and hot that a star is born. ...
Supernova worksheet ()
... Like many aspects of nature, star formation and destruction is a cycle. Stars form from clouds of gas, remain stable for long periods of time, and then expel gas back into space, where it can later form new stars. Below are four stages in the life of a massive star. Describe what happens in each sta ...
... Like many aspects of nature, star formation and destruction is a cycle. Stars form from clouds of gas, remain stable for long periods of time, and then expel gas back into space, where it can later form new stars. Below are four stages in the life of a massive star. Describe what happens in each sta ...
The Life Cycle of a star
... White dwarfs • 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 a white hot light. • The star has now reached the black dwarf phase in which it will forever rem ...
... White dwarfs • 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 a white hot light. • The star has now reached the black dwarf phase in which it will forever rem ...
Hertzsprung-Russell (H-R) Diagram Hertzsprung-Russell Diagram March 16 −
... Which is the hottest star? Which is the smallest star? Which is the biggest star? If stars A-D replaced the sun, would people be able to live in Michigan? a. b. c. d. e. ...
... Which is the hottest star? Which is the smallest star? Which is the biggest star? If stars A-D replaced the sun, would people be able to live in Michigan? a. b. c. d. e. ...
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.