Handout 3 1-2 ppt
... Fifty thousand years ago, a giant fireball streaked across the North American sky. It struck the earth in what is now northern Arizona, exploding with the force of 2 ½ million tons of TNT. ...
... Fifty thousand years ago, a giant fireball streaked across the North American sky. It struck the earth in what is now northern Arizona, exploding with the force of 2 ½ million tons of TNT. ...
Why is there a main sequence?
... is about the long, stable middle age of stars on the main sequence, and their old age as they swell to become giant stars. Here you will answer four important questions: • Why is there a main sequence? • Why is there a relationship between the masses and luminosities of main-sequence stars? • How do ...
... is about the long, stable middle age of stars on the main sequence, and their old age as they swell to become giant stars. Here you will answer four important questions: • Why is there a main sequence? • Why is there a relationship between the masses and luminosities of main-sequence stars? • How do ...
Introduction to Astronomy
... • As the hot material is crushed to nuclear density, protons and electrons combine to form neutrons. • The result is a “neutron star”: a ball of neutrons heavier than our sun, roughly 30 kilometers across (first predicted in 1932). • The left-over energy blows the rest of the star outward in a type- ...
... • As the hot material is crushed to nuclear density, protons and electrons combine to form neutrons. • The result is a “neutron star”: a ball of neutrons heavier than our sun, roughly 30 kilometers across (first predicted in 1932). • The left-over energy blows the rest of the star outward in a type- ...
Star Formation, HR Diagram, and the Main Sequence (Professor
... Meanwhile, back in the GMC, things are still happening ...
... Meanwhile, back in the GMC, things are still happening ...
Life on the Main Sequence + Expansion to Red Giant
... Guidepost Stars form from the interstellar medium and reach stability fusing hydrogen in their cores. This chapter is about the long, stable middle age of stars on the main sequence and their old age as they swell to become giant stars. Here you will answer four essential questions: • Why is there ...
... Guidepost Stars form from the interstellar medium and reach stability fusing hydrogen in their cores. This chapter is about the long, stable middle age of stars on the main sequence and their old age as they swell to become giant stars. Here you will answer four essential questions: • Why is there ...
Universe ppt - Killeen ISD
... Moving Galaxies - Astronomers use information about how galaxies are moving as one way to develop ideas about how the universe formed. By examining the visible light spectrum of a galaxy, astronomers can tell how fast the galaxy is moving toward or away from our galaxy (the Milky Way). Only a few of ...
... Moving Galaxies - Astronomers use information about how galaxies are moving as one way to develop ideas about how the universe formed. By examining the visible light spectrum of a galaxy, astronomers can tell how fast the galaxy is moving toward or away from our galaxy (the Milky Way). Only a few of ...
WORD - UWL faculty websites
... o Observing which wavelengths are missing after reflection tells you about the composition of the reflecting surface! o Observing which wavelengths are missing after passing through material (e.g. atmosphere of a planet or star) tells you about that material Most of the stuff in the universe is hy ...
... o Observing which wavelengths are missing after reflection tells you about the composition of the reflecting surface! o Observing which wavelengths are missing after passing through material (e.g. atmosphere of a planet or star) tells you about that material Most of the stuff in the universe is hy ...
Stellar Evolution (Powerpoint) 17
... created will not expand the star and shut off the fusion. • So, entire star (carbon, mostly) undergoes fusion at once. What a star normally takes billions of years to burn, this star burns all at once. BIG explosion! ...
... created will not expand the star and shut off the fusion. • So, entire star (carbon, mostly) undergoes fusion at once. What a star normally takes billions of years to burn, this star burns all at once. BIG explosion! ...
chapter_5_lecture_notes
... The dying star shrinks into a white dwarf which is a small dim star that is very dense and hot. Or the supernova collapses and the pull of gravity is so strong that nothing can escape, not even light, resulting in a black ...
... The dying star shrinks into a white dwarf which is a small dim star that is very dense and hot. Or the supernova collapses and the pull of gravity is so strong that nothing can escape, not even light, resulting in a black ...
Sydney Observatory night sky map January 2015
... This star chart shows the stars and constellations visible in the night sky for Sydney, Melbourne, Canberra, Hobart and Adelaide for January 2015 at about 8:30 pm (summer time) and at about 7:30 pm (local standard time) for Perth and Brisbane. For Darwin and similar locations the chart will still ap ...
... This star chart shows the stars and constellations visible in the night sky for Sydney, Melbourne, Canberra, Hobart and Adelaide for January 2015 at about 8:30 pm (summer time) and at about 7:30 pm (local standard time) for Perth and Brisbane. For Darwin and similar locations the chart will still ap ...
explaining the seasons and locating the north and south celestial
... DEC=23.8sin(35π/365.5)=6.970 for x=17.5 days after the spring equinox. Notice that if the earth’s tilt angle were zero, then the sun’s declination would remain unchanged throughout the year and there would be no seasons. Next let us look at the Celestial Sphere. This is an imaginary sphere of infini ...
... DEC=23.8sin(35π/365.5)=6.970 for x=17.5 days after the spring equinox. Notice that if the earth’s tilt angle were zero, then the sun’s declination would remain unchanged throughout the year and there would be no seasons. Next let us look at the Celestial Sphere. This is an imaginary sphere of infini ...
Lecture 5: Stars
... We find that stars range in mass from about 10-2M to about 102M. (Technically ‘stars’ less than about 0.1M are ‘brown dwarfs’ not stars as they do not burn H.) About 90% of stars lie on the main sequence (as we’ll see this is where they spend most of their lives burning H in their cores). The ‘’ ...
... We find that stars range in mass from about 10-2M to about 102M. (Technically ‘stars’ less than about 0.1M are ‘brown dwarfs’ not stars as they do not burn H.) About 90% of stars lie on the main sequence (as we’ll see this is where they spend most of their lives burning H in their cores). The ‘’ ...
HR Diagram and Stellar Fusion
... • When I say it moves, I mean it gets more radiant, more luminous as its absolute magnitude increases because it is now radiating light from a much larger surface area. • The star “moves” off the main sequence and over to the right on a path called a luminosity class. Depending on how big at birth, ...
... • When I say it moves, I mean it gets more radiant, more luminous as its absolute magnitude increases because it is now radiating light from a much larger surface area. • The star “moves” off the main sequence and over to the right on a path called a luminosity class. Depending on how big at birth, ...
Document
... B) An object that is larger than a planet and made out of star like material, but didn’t have enough mass to begin nuclear fusion C) A kind of protostar D) A first generation star 38) You have two incandescent lightbulbs that act as perfect blackbodies. Lightbulb A is at a much higher temperature th ...
... B) An object that is larger than a planet and made out of star like material, but didn’t have enough mass to begin nuclear fusion C) A kind of protostar D) A first generation star 38) You have two incandescent lightbulbs that act as perfect blackbodies. Lightbulb A is at a much higher temperature th ...
Document
... 10. Massive stars, when collapses under its own gravity, may become a neutron star. Its outer envelope can be blown off in a spectacular explosion that is known as a supernova. 11. Neutron stars are effectively a big “nucleus” consisting of neutrons worth of 2-3 solar masses. Some neutron stars spin ...
... 10. Massive stars, when collapses under its own gravity, may become a neutron star. Its outer envelope can be blown off in a spectacular explosion that is known as a supernova. 11. Neutron stars are effectively a big “nucleus” consisting of neutrons worth of 2-3 solar masses. Some neutron stars spin ...
History of the Universe and Solar System
... Supernovas and the Origin of our Solar System Evidence: Aluminum rich inclusions in meteorites contain the rare isotope Mg26, which forms by radioactive decay of Al26. The 1 MY halflife of Al26 indicates it became part of the meteorite within a few million years (or less) of a supernova explosion. • ...
... Supernovas and the Origin of our Solar System Evidence: Aluminum rich inclusions in meteorites contain the rare isotope Mg26, which forms by radioactive decay of Al26. The 1 MY halflife of Al26 indicates it became part of the meteorite within a few million years (or less) of a supernova explosion. • ...
Ursa Minor
Ursa Minor (Latin: ""Smaller She-Bear"", contrasting with Ursa Major), also known as the Little Bear, is a constellation in the northern sky. Like the Great Bear, the tail of the Little Bear may also be seen as the handle of a ladle, hence the name Little Dipper. It was one of the 48 constellations listed by the 2nd-century astronomer Ptolemy, and remains one of the 88 modern constellations. Ursa Minor has traditionally been important for navigation, particularly by mariners, due to Polaris being the North Star.Polaris, the brightest star in the constellation, is a yellow-white supergiant and the brightest Cepheid variable star in the night sky, ranging from apparent magnitude 1.97 to 2.00. Beta Ursae Minoris, also known as Kochab, is an aging star that has swollen and cooled to become an orange giant with an apparent magnitude of 2.08, only slightly fainter than Polaris. Kochab and magnitude 3 Gamma Ursae Minoris have been called the ""guardians of the pole star"". Planets have been detected orbiting four of the stars, including Kochab. The constellation also contains an isolated neutron star—Calvera—and H1504+65, the hottest white dwarf yet discovered with a surface temperature of 200,000 K.