The Milky Way – A Classic Galaxy
... • Measure the period of pulsation • Pick off the Luminosity from the Cepheid P-L Relation • Calculate how far away the star must be to have that luminosity look like the apparent brightness we see here from Earth ...
... • Measure the period of pulsation • Pick off the Luminosity from the Cepheid P-L Relation • Calculate how far away the star must be to have that luminosity look like the apparent brightness we see here from Earth ...
Level 6 Stars and Constellations
... passes successively through 12 constellations. All planets (except Pluto at certain times) can be observed only in these 12 constellations, which form the so-called zodiac, and the Sun also moves through the zodiacal signs, though the Sun's apparent movement is actually caused by the movement of Ear ...
... passes successively through 12 constellations. All planets (except Pluto at certain times) can be observed only in these 12 constellations, which form the so-called zodiac, and the Sun also moves through the zodiacal signs, though the Sun's apparent movement is actually caused by the movement of Ear ...
Spectroscopy, the Doppler Shift and Masses of Binary Stars
... The stars on the left are separated by 2.3 about 140 AU; those on the right by 2.6 . The two pairs are separated by about 208 (13,000 AU separation, 0.16 ly between the two pairs, all about 162 ly distant). Each pair would be about as bright as the quarter moon viewed from the other. ...
... The stars on the left are separated by 2.3 about 140 AU; those on the right by 2.6 . The two pairs are separated by about 208 (13,000 AU separation, 0.16 ly between the two pairs, all about 162 ly distant). Each pair would be about as bright as the quarter moon viewed from the other. ...
IB_Op_F_04 - Effectsmeister
... early 1900's. It is sometimes called a color - magnitude diagram. Why is this ( or why is this not) an appropriate name for a plot of magnitude versus spectral class? Our star, the Sun, is a G2 spectral class star with an absolute magnitude of 4.8 . How does it compare to the locations of the near s ...
... early 1900's. It is sometimes called a color - magnitude diagram. Why is this ( or why is this not) an appropriate name for a plot of magnitude versus spectral class? Our star, the Sun, is a G2 spectral class star with an absolute magnitude of 4.8 . How does it compare to the locations of the near s ...
Starry Night¨ Times - October 2008
... (40x) to find the object, and then try 100x and 200x. The name "planetary" is misleading, as these objects are not planets at all but stars at the end of their life cycle. However, they do look something like cloudy planets, and this fact confused earlier observers whose incorrect naming convention ...
... (40x) to find the object, and then try 100x and 200x. The name "planetary" is misleading, as these objects are not planets at all but stars at the end of their life cycle. However, they do look something like cloudy planets, and this fact confused earlier observers whose incorrect naming convention ...
DR 19.2 - Cobb Learning
... ______ 21. stars with low mass, low temperature, and low absolute magnitude ______ 22. small hot stars that are dimmer than the sun ______ 23. high-temperature stars that quickly use up their hydrogen ______ 24. cool stars with absolute magnitude ______ 25. stars in the band that runs along the midd ...
... ______ 21. stars with low mass, low temperature, and low absolute magnitude ______ 22. small hot stars that are dimmer than the sun ______ 23. high-temperature stars that quickly use up their hydrogen ______ 24. cool stars with absolute magnitude ______ 25. stars in the band that runs along the midd ...
Chapter 12
... Stars in a star cluster all have approximately the same age! More massive stars evolve more quickly ...
... Stars in a star cluster all have approximately the same age! More massive stars evolve more quickly ...
Star Formation
... 10 million Kelvin needed to start fusion in a million years (1/50 time taken by sun) • An M-type star less massive than our sun takes one billion years to form ...
... 10 million Kelvin needed to start fusion in a million years (1/50 time taken by sun) • An M-type star less massive than our sun takes one billion years to form ...
Star Types
... The total spread (size) of the Doppler shift gives velocities about center of mass (gives orbit sizes, rA+rB ) The time to complete one repeating pattern gives period, P ...
... The total spread (size) of the Doppler shift gives velocities about center of mass (gives orbit sizes, rA+rB ) The time to complete one repeating pattern gives period, P ...
Sample multiple choice questions for Exam 2
... 25. Why do massive stars run out of hydrogen in their cores faster than less massive stars? a) Their hydrogen fuses faster because of greater temperatures inside. b) There is less hydrogen in their cores. c) The cores of less massive stars contain a greater percentage of helium, which slows hydrogen ...
... 25. Why do massive stars run out of hydrogen in their cores faster than less massive stars? a) Their hydrogen fuses faster because of greater temperatures inside. b) There is less hydrogen in their cores. c) The cores of less massive stars contain a greater percentage of helium, which slows hydrogen ...
RED “O Big Red
... (all-deB-er-on) was one of the brightest stars in earth’s sky. soon the Stella was bathed in red light. “this star is enormous!” manolo shouted. “it’s 44 times wider than the sun, but its temperature is much cooler. how does such a cool star shine so brightly?” Captain Gamma turned off the cabin lig ...
... (all-deB-er-on) was one of the brightest stars in earth’s sky. soon the Stella was bathed in red light. “this star is enormous!” manolo shouted. “it’s 44 times wider than the sun, but its temperature is much cooler. how does such a cool star shine so brightly?” Captain Gamma turned off the cabin lig ...
Phobos
... This star is the famous Castor, the horseman. There is some idea that either this star or Pollux has changed in brightness over the past few hundred years because Castor is no longer the brighter of the two. Instead it is now ranked as the 23rd brightest star in the sky or perhaps we should say brig ...
... This star is the famous Castor, the horseman. There is some idea that either this star or Pollux has changed in brightness over the past few hundred years because Castor is no longer the brighter of the two. Instead it is now ranked as the 23rd brightest star in the sky or perhaps we should say brig ...
14.5 Yellow Giants and Pulsating Stars Variable Stars Not all stars
... perhaps a few million years, but cross it less often. In either case, stars pulsate for only a brief portion of their lives. Astronomers have identified many other types of pulsating variables besides Cepheids and RR Lyrae stars. For example, ZZ Ceti stars, a kind of pulsating white dwarf with perio ...
... perhaps a few million years, but cross it less often. In either case, stars pulsate for only a brief portion of their lives. Astronomers have identified many other types of pulsating variables besides Cepheids and RR Lyrae stars. For example, ZZ Ceti stars, a kind of pulsating white dwarf with perio ...
Lecture 24 - Empyrean Quest Publishers
... from apparent brightness and distance (d). Apparent magnitude (old way). We can see about 1,000 stars in Northern Hemisphere with naked eye. Hipparchus rated them from 1 to 6. A '1' is 2.52 x brighter than a '2', etc. Range in brightness from the sun at '-26' magnitude to the faintest objects seen a ...
... from apparent brightness and distance (d). Apparent magnitude (old way). We can see about 1,000 stars in Northern Hemisphere with naked eye. Hipparchus rated them from 1 to 6. A '1' is 2.52 x brighter than a '2', etc. Range in brightness from the sun at '-26' magnitude to the faintest objects seen a ...
Earth
... 1. It takes 4.3 years for light from this star to reach Earth E. Some stars are much further away 1. Cassiopeia A is 11,000 light years away F. It takes 8 minutes for light from our sun to reach the Earth ...
... 1. It takes 4.3 years for light from this star to reach Earth E. Some stars are much further away 1. Cassiopeia A is 11,000 light years away F. It takes 8 minutes for light from our sun to reach the Earth ...
OTA System Report For June 4, 2009 8:30 AM
... magnitude determined is 14.004 . The star is 0.45 magnitudes dimmer, although close to the GSC2 1 sigma error, this value is approximately 1.5 1 sigma. The star has been matched to a single star. One can only assume it is dimmer than suspected and I recommend not using this star in the future. Natur ...
... magnitude determined is 14.004 . The star is 0.45 magnitudes dimmer, although close to the GSC2 1 sigma error, this value is approximately 1.5 1 sigma. The star has been matched to a single star. One can only assume it is dimmer than suspected and I recommend not using this star in the future. Natur ...
