Slide 1
... helium. At these temperatures most of the hydrogen is ionized, so the hydrogen lines are weak. Both HeI and HeII (singly ionized helium) are seen in the higher temperature examples. The radiation from O5 stars is so intense that it can ionize hydrogen over a volume of space 1000 light years across. ...
... helium. At these temperatures most of the hydrogen is ionized, so the hydrogen lines are weak. Both HeI and HeII (singly ionized helium) are seen in the higher temperature examples. The radiation from O5 stars is so intense that it can ionize hydrogen over a volume of space 1000 light years across. ...
Teacher`s Guide The Solar Empire: A Star is Born
... 1. Ask your students how they think astronomers can make inferences about the life of a particular star, from its birth to its death, taking into consideration that it is impossible to observe a star’s evolution through its entire lifetime. 2. Make sure students understand that because a star’s init ...
... 1. Ask your students how they think astronomers can make inferences about the life of a particular star, from its birth to its death, taking into consideration that it is impossible to observe a star’s evolution through its entire lifetime. 2. Make sure students understand that because a star’s init ...
The magnitude scale, parallax, the parsec, and Cepheid distances
... – ~0.05" (d = 20 pc) with ground-‐based telescopes – ~0.005" (d = 200 pc) with satellites such as Hipparcos (1997) – ~0.001” with GAIA due for launch in 2013 by ESA ...
... – ~0.05" (d = 20 pc) with ground-‐based telescopes – ~0.005" (d = 200 pc) with satellites such as Hipparcos (1997) – ~0.001” with GAIA due for launch in 2013 by ESA ...
THE LIFE CYCLE OF STARS
... Young stars emit jets of intense radiation that heat the surrounding matter to the point at which it glows brightly. These narrowly-focused jets can be trillions of miles long and can travel at 500,000 miles per hour. These jets may be focused by the star's magnetic field. The protostar is now a sta ...
... Young stars emit jets of intense radiation that heat the surrounding matter to the point at which it glows brightly. These narrowly-focused jets can be trillions of miles long and can travel at 500,000 miles per hour. These jets may be focused by the star's magnetic field. The protostar is now a sta ...
Document
... • When a high-mass star’s core is greater than ~3 x Msun, then, when it collapses, neutron degeneracy pressure can’t balance gravity. • The star collapses to form a singularity. • No size at all. • Density infinite. • Escape velocity > c ...
... • When a high-mass star’s core is greater than ~3 x Msun, then, when it collapses, neutron degeneracy pressure can’t balance gravity. • The star collapses to form a singularity. • No size at all. • Density infinite. • Escape velocity > c ...
Lecture16
... Imagine a pipe as wide as a state and as long as half the Earth. Now imagine that this pipe is filled with hot gas moving 50,000 kilometers per hour. Further imagine that this pipe is not made of metal but a transparent magnetic field. You are envisioning just one of thousands of young spicules on ...
... Imagine a pipe as wide as a state and as long as half the Earth. Now imagine that this pipe is filled with hot gas moving 50,000 kilometers per hour. Further imagine that this pipe is not made of metal but a transparent magnetic field. You are envisioning just one of thousands of young spicules on ...
proper motion
... parallax shifts with respect to the distant background of stars. Tycho Brahe improved positional measures from +/- 10 arc minutes to as good as +/- 1 arc minute, but he could measure no parallaxes. This implied either that the stars were more than 3000 Astronomical Units away, or that the Earth was ...
... parallax shifts with respect to the distant background of stars. Tycho Brahe improved positional measures from +/- 10 arc minutes to as good as +/- 1 arc minute, but he could measure no parallaxes. This implied either that the stars were more than 3000 Astronomical Units away, or that the Earth was ...
Astronomy Final Exam Review
... • Supernova- how massive and supermassive stars begin the end of their lives (after red giant or supergiant phase) • Quasar- rare, starlike object that gives off radio waves as material is sucked toward a black hole • Light year- the distance light travels in a year • AU-(astronomical unit)- 1AU= di ...
... • Supernova- how massive and supermassive stars begin the end of their lives (after red giant or supergiant phase) • Quasar- rare, starlike object that gives off radio waves as material is sucked toward a black hole • Light year- the distance light travels in a year • AU-(astronomical unit)- 1AU= di ...
July - astra
... An Open Cluster is a group of several to hundreds of stars The planets are best observed with a telescope using magnifithat were born out of the same nebula cloud. A group often forms cations from 50x to 200x. The five naked-eye planets are Mera pretty pattern. The Pleiades and Praesepe are great ex ...
... An Open Cluster is a group of several to hundreds of stars The planets are best observed with a telescope using magnifithat were born out of the same nebula cloud. A group often forms cations from 50x to 200x. The five naked-eye planets are Mera pretty pattern. The Pleiades and Praesepe are great ex ...
StarCharacteristics
... across the street, which light would appear brighter? You cannot tell by looking in the sky how bright a star truly is. The farther away the star is, the less bright it will appear. ...
... across the street, which light would appear brighter? You cannot tell by looking in the sky how bright a star truly is. The farther away the star is, the less bright it will appear. ...
E1 Introduction to the Universe NEW
... rotate around the pole star • Some stars rise above the horizon during the night, and some set behind it. ...
... rotate around the pole star • Some stars rise above the horizon during the night, and some set behind it. ...
Unit 3 - Section 9.1 2011 Distances in Space
... 8. Assuming each tile on the floor is 1 LY, what is the separation distance in light years? 9. Locate at point randomly between 90O and 91O at 30 tiles 10. What is the coordinate degree you would assign to the new coordinate to exactly reach this point on the floor? NOTE: You cannot guess….you must ...
... 8. Assuming each tile on the floor is 1 LY, what is the separation distance in light years? 9. Locate at point randomly between 90O and 91O at 30 tiles 10. What is the coordinate degree you would assign to the new coordinate to exactly reach this point on the floor? NOTE: You cannot guess….you must ...
Grade 9 Academic Science – Unit 3 Space
... 8. Assuming each tile on the floor is 1 LY, what is the separation distance in light years? 9. Locate at point randomly between 90O and 91O at 30 tiles 10. What is the coordinate degree you would assign to the new coordinate to exactly reach this point on the floor? NOTE: You cannot guess….you must ...
... 8. Assuming each tile on the floor is 1 LY, what is the separation distance in light years? 9. Locate at point randomly between 90O and 91O at 30 tiles 10. What is the coordinate degree you would assign to the new coordinate to exactly reach this point on the floor? NOTE: You cannot guess….you must ...
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.