A little bit more to do. Stefan
... • To figure out the total luminosity being emitted by the box, we would need to multiply the luminosity of one side by 6. This is because there are six sides of the cube for the energy to escape from. ...
... • To figure out the total luminosity being emitted by the box, we would need to multiply the luminosity of one side by 6. This is because there are six sides of the cube for the energy to escape from. ...
The Milky Way
... And we know how bright it should be, Result Distance We do this everyday with size. ...
... And we know how bright it should be, Result Distance We do this everyday with size. ...
February 16
... Discussion But, what if there is a lot of dust between us and the object we are observing. That would make the object appear fainter and we would be misled into thinking the object was much farther away than it really is. How can astronomers determine if dust is making things fainter? ...
... Discussion But, what if there is a lot of dust between us and the object we are observing. That would make the object appear fainter and we would be misled into thinking the object was much farther away than it really is. How can astronomers determine if dust is making things fainter? ...
1) The following questions refer to the HR diagram
... A) it amplifies the contrast with red giants. B) they are both very hot and very small. C) they are supported by electron degeneracy pressure. D) they are the end-products of small, low-mass stars. E) they are the opposite of black holes. 22) What happens to the surface temperature and luminosity wh ...
... A) it amplifies the contrast with red giants. B) they are both very hot and very small. C) they are supported by electron degeneracy pressure. D) they are the end-products of small, low-mass stars. E) they are the opposite of black holes. 22) What happens to the surface temperature and luminosity wh ...
Phobos
... imply that the Hubble constant should be correspondingly reduced and that the Universe could be 15% bigger and older. The astronomers studied two of the brightest stars in M33, the components of a binary system in which one star eclipses the other every five days. They determined the masses of the c ...
... imply that the Hubble constant should be correspondingly reduced and that the Universe could be 15% bigger and older. The astronomers studied two of the brightest stars in M33, the components of a binary system in which one star eclipses the other every five days. They determined the masses of the c ...
Science 9: Unit 4 Review
... 23. Astronomers believe that the universe is expanding. What does this ...
... 23. Astronomers believe that the universe is expanding. What does this ...
Astronomy Vocabulary File
... Light-year—a unit of length equal to the distance that light travels through space in 1 year Parallax—an apparent shift in the position of an object when viewed from different locations H-R diagram—Hertzsprung-Russell diagram; a graph that shows the relationship between a star’s surface temperature ...
... Light-year—a unit of length equal to the distance that light travels through space in 1 year Parallax—an apparent shift in the position of an object when viewed from different locations H-R diagram—Hertzsprung-Russell diagram; a graph that shows the relationship between a star’s surface temperature ...
Study Guide: Solar System
... Earth would continue in the path of inertia because the gravitational force of the sun would no longer be there. Inertia wants an object to continue in the path it is already taking, a straight line. So Earth would continue in a straight line until it came upon another object that had a greater m ...
... Earth would continue in the path of inertia because the gravitational force of the sun would no longer be there. Inertia wants an object to continue in the path it is already taking, a straight line. So Earth would continue in a straight line until it came upon another object that had a greater m ...
Phys133 SAMPLE questions for MidTerm#1
... A) They all can be used as lunar calendars. B) They were all built on the orders of ancient kings. C) They were all used by ancient peoples for astronomical observations. D) They were all places used for religious sacrifice. E) all of the above ...
... A) They all can be used as lunar calendars. B) They were all built on the orders of ancient kings. C) They were all used by ancient peoples for astronomical observations. D) They were all places used for religious sacrifice. E) all of the above ...
ASTR 300 Stars and Stellar Systems Spring 2011
... Barnard’s star is now at 5.9 ly, we would have to move it to 5.9/3.981 = 1.48 ly. Barnard’s star is actually moving towards us at 107 km/s, and in about 10,000 years it will pass within 3.8 ly of us; after that its distance will increase again. When it is 3.8 ly away it will be the nearest star. Wil ...
... Barnard’s star is now at 5.9 ly, we would have to move it to 5.9/3.981 = 1.48 ly. Barnard’s star is actually moving towards us at 107 km/s, and in about 10,000 years it will pass within 3.8 ly of us; after that its distance will increase again. When it is 3.8 ly away it will be the nearest star. Wil ...
Introduction to Astronomy
... (temperature)4 For a given size, hotter implies brighter. A bright, cool star must be unusually large (“red giant”). A faint, hot star must be unusually small (“white dwarf”). ...
... (temperature)4 For a given size, hotter implies brighter. A bright, cool star must be unusually large (“red giant”). A faint, hot star must be unusually small (“white dwarf”). ...
Star Search Game: Constructing a Hertzsprung
... Star Search Game: Constructing a Hertzsprung-Russell Diagram Inspired by: Ian Christie (VSSEC); Activity created by: Nandita Bajaj Introduction: Star Search is an online game developed by the Victorian Space Science Education Centre (VSSEC) that allows the user to go on a simulated journey into spac ...
... Star Search Game: Constructing a Hertzsprung-Russell Diagram Inspired by: Ian Christie (VSSEC); Activity created by: Nandita Bajaj Introduction: Star Search is an online game developed by the Victorian Space Science Education Centre (VSSEC) that allows the user to go on a simulated journey into spac ...
Science Olympiad 2008 Reach for the Stars Division B
... most determines how they will differ? A) location where they are formed B) time they are formed C) luminosity they are formed with D) mass they are formed with E) color they are formed with 111. The spectral sequence sorts stars according to: (choose as many as apply) A) mass B) surface temperature ...
... most determines how they will differ? A) location where they are formed B) time they are formed C) luminosity they are formed with D) mass they are formed with E) color they are formed with 111. The spectral sequence sorts stars according to: (choose as many as apply) A) mass B) surface temperature ...
Scale of the Universe
... 13. Sedna is the farthest object in our solar system. It takes _____________________years to orbit the Sun! 14. The moon is also known as _____________ & takes _______days______hours & ______minutes to orbit Earth. Planets: 15. Mercury’s year is ________ Earth days long. It is ____________during the ...
... 13. Sedna is the farthest object in our solar system. It takes _____________________years to orbit the Sun! 14. The moon is also known as _____________ & takes _______days______hours & ______minutes to orbit Earth. Planets: 15. Mercury’s year is ________ Earth days long. It is ____________during the ...
Homework Problem #1: (pdf file)
... brightness at Mauna Kea is listed at the CFHT WWW site as 20.9 mag/arcsec2 . The LRIS pixel scale is 0.22 arcseconds/pixel, the readout noise is 8e- and the inverse gain of the system is 2.0 e-/DN. (a) What is the rate of detected e-/pixel from the sky in the R band? (b) What is the rate of detected ...
... brightness at Mauna Kea is listed at the CFHT WWW site as 20.9 mag/arcsec2 . The LRIS pixel scale is 0.22 arcseconds/pixel, the readout noise is 8e- and the inverse gain of the system is 2.0 e-/DN. (a) What is the rate of detected e-/pixel from the sky in the R band? (b) What is the rate of detected ...
Document
... the same time. • The cluster is as old as the most luminous (massive) star left on the MS. • All MS stars to the left have already used up their H fuel and are gone. • The position of the hottest, brightest star on a cluster’s main sequence is called the main sequence turnoff point. ...
... the same time. • The cluster is as old as the most luminous (massive) star left on the MS. • All MS stars to the left have already used up their H fuel and are gone. • The position of the hottest, brightest star on a cluster’s main sequence is called the main sequence turnoff point. ...
1 Ay 124 Winter 2014 – HOMEWORK #1
... Problem 1. Observing Distant Solar-type Stars Assume for the time being that the Galaxy has no dust, and that we are observing along a line of sight at b = 0 deg and l = 180 deg. We are interested in observing the most distant solar-type stars (MV ' +5.1) possible, but our apparent magnitude limit f ...
... Problem 1. Observing Distant Solar-type Stars Assume for the time being that the Galaxy has no dust, and that we are observing along a line of sight at b = 0 deg and l = 180 deg. We are interested in observing the most distant solar-type stars (MV ' +5.1) possible, but our apparent magnitude limit f ...
ASTRONOMY: WHAT DO YOU NEED TO KNOW
... What is the interstellar medium and what is it made of? Low density dust and gas What is a nebula? A visible cloud of dust and gas Be able to identify the three types of nebulae and give their characteristics: (formation, color) Emission nebulae: are produced when a star (temperatures > 25000K) exci ...
... What is the interstellar medium and what is it made of? Low density dust and gas What is a nebula? A visible cloud of dust and gas Be able to identify the three types of nebulae and give their characteristics: (formation, color) Emission nebulae: are produced when a star (temperatures > 25000K) exci ...
CST Prep- 8th Grade Astronomy
... 34. Satellites (moons) and small planets have little or no atmosphere because they are too small and have insufficient __________________ to hold and maintain an atmosphere. 35. On Mars water is frozen at the __________________. 36. The largest volcano in the solar system is on Mars, what is its nam ...
... 34. Satellites (moons) and small planets have little or no atmosphere because they are too small and have insufficient __________________ to hold and maintain an atmosphere. 35. On Mars water is frozen at the __________________. 36. The largest volcano in the solar system is on Mars, what is its nam ...
Solar System - U
... refractory minerals, such as the silicates, which form their crusts and mantles, and metals, such as iron and nickel, which form their cores. Three of the four inner planets (Venus, Earth and Mars) have atmospheres substantial enough to generate weather; all have impact craters and tectonic surface ...
... refractory minerals, such as the silicates, which form their crusts and mantles, and metals, such as iron and nickel, which form their cores. Three of the four inner planets (Venus, Earth and Mars) have atmospheres substantial enough to generate weather; all have impact craters and tectonic surface ...
The power plant of the Sun and stars
... Visual binaries…you can see them as two stars in a telescope Like Albireo, Sirius, Nu Draconis Alpha Geminorum: Castor ...
... Visual binaries…you can see them as two stars in a telescope Like Albireo, Sirius, Nu Draconis Alpha Geminorum: Castor ...
A small mass difference between Hydrogen and Helium The
... and orbital speeds, and thus the masses of the stars From observations of binaries, we have the masses Of a sample of stars, and can study how stellar Properties depend on mass. ...
... and orbital speeds, and thus the masses of the stars From observations of binaries, we have the masses Of a sample of stars, and can study how stellar Properties depend on mass. ...
Integrative Studies 410 Our Place in the Universe
... • Main-sequence star; pressure from nuclear fusion and gravity are in balance – Duration ~ 10 billion years (much longer than all other stages combined) – Temperature ~ 15 million K at core, 6000 K at surface – Size ~ Sun ...
... • Main-sequence star; pressure from nuclear fusion and gravity are in balance – Duration ~ 10 billion years (much longer than all other stages combined) – Temperature ~ 15 million K at core, 6000 K at surface – Size ~ Sun ...
Teaching ideas for Option E, Astrophysics
... many examples to make sure students understand that the smaller the magnitude the brighter the star appears to be. Students will always ask where the letters OBAFGKM for spectral classes come from. There is no interesting story behind this though; they started as A, B, etc. but were later reordered. ...
... many examples to make sure students understand that the smaller the magnitude the brighter the star appears to be. Students will always ask where the letters OBAFGKM for spectral classes come from. There is no interesting story behind this though; they started as A, B, etc. but were later reordered. ...
Corvus (constellation)
Corvus is a small constellation in the Southern Celestial Hemisphere. Its name comes from the Latin word ""raven"" or ""crow"". It includes only 11 stars with brighter than 4.02 magnitudes. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations. The four brightest stars, Gamma, Delta, Epsilon, and Beta Corvi from a distinctive quadrilateral in the night sky. The young star Eta Corvi has been found to have two debris disks.