Microsoft Power Point version
... If p is in arcsec and d is in parsecs A star with a parallax of 1 arcsec is 1 parsec distant ...
... If p is in arcsec and d is in parsecs A star with a parallax of 1 arcsec is 1 parsec distant ...
galaxy
... Only three galaxies outside the Milky Way are visible with the unaided eye. People in the Northern Hemisphere can see the Andromeda Galaxy, which is about 2 million light-years away. People in the Southern Hemisphere can see the Large Magellanic Cloud, which is about 160,000 light-years from Earth, ...
... Only three galaxies outside the Milky Way are visible with the unaided eye. People in the Northern Hemisphere can see the Andromeda Galaxy, which is about 2 million light-years away. People in the Southern Hemisphere can see the Large Magellanic Cloud, which is about 160,000 light-years from Earth, ...
An Introduction to Astronomy and Cosmology
... Eve or the 30th June. Since the time definition was changed, 22 leap seconds have had to be added, about one every 18 months, but there were none between 1998 and 2005 showing the slowdown is not particularly regular. Leap seconds are somewhat of a nuisance for systems such as the Global Positioning ...
... Eve or the 30th June. Since the time definition was changed, 22 leap seconds have had to be added, about one every 18 months, but there were none between 1998 and 2005 showing the slowdown is not particularly regular. Leap seconds are somewhat of a nuisance for systems such as the Global Positioning ...
Star Properties and Stellar Evolution
... 1. Pulsating stars – expand and contract 2. Cepheid Variables – used to find distances to galaxies that contain them 3. Eclipsing Binaries – 2 stars revolve around each other ...
... 1. Pulsating stars – expand and contract 2. Cepheid Variables – used to find distances to galaxies that contain them 3. Eclipsing Binaries – 2 stars revolve around each other ...
05spectralclasses
... (implied large radius) giants • Some are very underluminous for their class white dwarfs ...
... (implied large radius) giants • Some are very underluminous for their class white dwarfs ...
Characteristics of Stars
... diagram below). This is the same thing that happens when you look at a close object with first one eye and then the other. For example, hold your thumb at the tip of your nose. Look at your thumb with first your right eye and then your left. Your thumb appears to move because your eyes are not at ex ...
... diagram below). This is the same thing that happens when you look at a close object with first one eye and then the other. For example, hold your thumb at the tip of your nose. Look at your thumb with first your right eye and then your left. Your thumb appears to move because your eyes are not at ex ...
chapter 28 pages 747-752
... • 3. Once it is hot enough for H to fuse into He, main sequence stage occurs • This is the longest stage of a stars life. • 4. In medium sized stars, once all H has been fused into He, He then starts to fuse into C during the Red Giant stage ...
... • 3. Once it is hot enough for H to fuse into He, main sequence stage occurs • This is the longest stage of a stars life. • 4. In medium sized stars, once all H has been fused into He, He then starts to fuse into C during the Red Giant stage ...
UNIT 4 STUDY GUIDE Objectives
... From what regions do comets originate? Which region is further away? What are asteroids and where are they found? What is the difference between a meteoroid, meteor and a meteorite? What is asteroid belt and where is it located? What is a constellation? What characteristics are used to classify star ...
... From what regions do comets originate? Which region is further away? What are asteroids and where are they found? What is the difference between a meteoroid, meteor and a meteorite? What is asteroid belt and where is it located? What is a constellation? What characteristics are used to classify star ...
The Evolution of Massive Stars
... debris from a supernova in about 1680: today the brightest radio source in the sky ...
... debris from a supernova in about 1680: today the brightest radio source in the sky ...
Document
... The change in position of an object with respect to a distant background is called parallax. As Earth moves in its orbit, astronomers are able to observe stars from two different positions. Astronomers measure the parallax of nearby stars to determine their distance from Earth ...
... The change in position of an object with respect to a distant background is called parallax. As Earth moves in its orbit, astronomers are able to observe stars from two different positions. Astronomers measure the parallax of nearby stars to determine their distance from Earth ...
HW2 due - Yale Astronomy
... 3. (15 points) One of the nearest stars is Sirius B, a white dwarf star which orbits Sirius A, the brightest star in the sky. Sirius B has a radius of 0.0084 Rsun and a luminosity of 0.02 ...
... 3. (15 points) One of the nearest stars is Sirius B, a white dwarf star which orbits Sirius A, the brightest star in the sky. Sirius B has a radius of 0.0084 Rsun and a luminosity of 0.02 ...
Stars - Madison County Schools
... • The objects that heat and light the planets in a system • A star is a ball of plasma held together by its own gravity – Nuclear reactions occur in stars (H He) – Energy from the nuclear reactions is released as electromagnetic radiation ...
... • The objects that heat and light the planets in a system • A star is a ball of plasma held together by its own gravity – Nuclear reactions occur in stars (H He) – Energy from the nuclear reactions is released as electromagnetic radiation ...
What is a Red Shift?
... humans. Describe some situations where the sun helps us as humans, with our community, and our way of living. ...
... humans. Describe some situations where the sun helps us as humans, with our community, and our way of living. ...
Earth Science – Quiz 2
... 40. Using the absolute magnitude scale, one can conclude a. the smaller the star, the brighter the star. b. the smaller the star, the bluer the star c. the bigger the star, the brighter the star d. big stars are huge celebrities. 41. The HR-diagram classifies a star using a. brightness and magnitude ...
... 40. Using the absolute magnitude scale, one can conclude a. the smaller the star, the brighter the star. b. the smaller the star, the bluer the star c. the bigger the star, the brighter the star d. big stars are huge celebrities. 41. The HR-diagram classifies a star using a. brightness and magnitude ...
Constellations
... C. The revolution of the earth around the sun D. The revolution of the sun around the Milky Way galaxy 7. Most of the constellations we're familiar with were first charted by: A. The International Astronomical Union B. Ancient Europeans and Middle Easterners C. Astronomers in ancient China D. Ancien ...
... C. The revolution of the earth around the sun D. The revolution of the sun around the Milky Way galaxy 7. Most of the constellations we're familiar with were first charted by: A. The International Astronomical Union B. Ancient Europeans and Middle Easterners C. Astronomers in ancient China D. Ancien ...
2014 Joseph E. Pesce, Ph.D. 1 Astro 113 Final Exam Review 1. What
... 27. Why does the region of the sky called the “Milky Way” have a larger concentration of stars than other regions? 28. What is an effect of a large fraction of dark matter in the Universe? ...
... 27. Why does the region of the sky called the “Milky Way” have a larger concentration of stars than other regions? 28. What is an effect of a large fraction of dark matter in the Universe? ...
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.