ESA-ESO Working Group on the Galaxy
... -Very small number of extremely metal-poor stars known to date: 3 with [Fe/H] < -4.5 -Direct counts provide constraints on the IMF at high-redshift e.g. there may be a critical Z below which only very massive stars form ...
... -Very small number of extremely metal-poor stars known to date: 3 with [Fe/H] < -4.5 -Direct counts provide constraints on the IMF at high-redshift e.g. there may be a critical Z below which only very massive stars form ...
Variable star information
... Another class of variable stars owe their change in brightness to their irregular shape and/or to their non-uniform surface. In some cases, the star's shape may not be a perfect sphere, but rather an ellipsoid. Alternatively, the brightness across the surface of the star itself may vary because of t ...
... Another class of variable stars owe their change in brightness to their irregular shape and/or to their non-uniform surface. In some cases, the star's shape may not be a perfect sphere, but rather an ellipsoid. Alternatively, the brightness across the surface of the star itself may vary because of t ...
`earthlike` and second the probability that they have suitable climate
... The existence of planetary systems around other stars has been thought likely since at least the 18th century However they are very difficult to see directly with telescopes and the light reflected from such planets orbiting another star has never been observed. The reason it is so hard is that the ...
... The existence of planetary systems around other stars has been thought likely since at least the 18th century However they are very difficult to see directly with telescopes and the light reflected from such planets orbiting another star has never been observed. The reason it is so hard is that the ...
WEBDA - a tool for CP star research in open clusters
... success of WEBDA is documented by its worldwide usage and the related acknowledgements in the literature: more than 450 refereed publications within the last seven years acknowledge its use. It collects all published data for stars in open clusters that may be useful either to determine membership, ...
... success of WEBDA is documented by its worldwide usage and the related acknowledgements in the literature: more than 450 refereed publications within the last seven years acknowledge its use. It collects all published data for stars in open clusters that may be useful either to determine membership, ...
SNC1P - MsKhan
... (with no binoculars or telescopes) -moons = smaller celestial objects orbiting around ________________ -moons are also visible because they reflect the light of the Sun -Earth has 1 moon, Jupiter and Saturn have more than 60 moons each -galaxies = huge, rotating collections of gas, dust, stars, plan ...
... (with no binoculars or telescopes) -moons = smaller celestial objects orbiting around ________________ -moons are also visible because they reflect the light of the Sun -Earth has 1 moon, Jupiter and Saturn have more than 60 moons each -galaxies = huge, rotating collections of gas, dust, stars, plan ...
14-1 Reading Questions: Neutron Stars
... ___________________________. Theory predicts that such an object would spin _____________ times per second, have a surface temperature nearly as hot as the ___________ interior, and possess a magnetic field a ________________ times stronger than Earth’s. 2. How are neutron stars similar to white dwa ...
... ___________________________. Theory predicts that such an object would spin _____________ times per second, have a surface temperature nearly as hot as the ___________ interior, and possess a magnetic field a ________________ times stronger than Earth’s. 2. How are neutron stars similar to white dwa ...
Document
... • As density increases, the force of gravity on the surface increases. • The greater the force, the higher the escape ...
... • As density increases, the force of gravity on the surface increases. • The greater the force, the higher the escape ...
Stars: from Adolescence to Old Age
... • Larger, more luminous stars will pulsate with longer periods than the smaller, fainter stars – because gravity takes longer to pull the more extended outer layers of the larger stars back ...
... • Larger, more luminous stars will pulsate with longer periods than the smaller, fainter stars – because gravity takes longer to pull the more extended outer layers of the larger stars back ...
powerpoints - Georgia Southern University Astrophysics
... after ground based followup – so still only 16 ...
... after ground based followup – so still only 16 ...
Project 4: The HR diagram. Open clusters
... Exercise 2: Sirius is about twice as massive as the Sun. How much brighter is it with respect to the Sun? In the HR diagram, where will you find the least massive stars? and the most massive stars? If I double the mass of a main sequence star, the luminosity increases by a factor 2 3.5 ~ 11.3. ...
... Exercise 2: Sirius is about twice as massive as the Sun. How much brighter is it with respect to the Sun? In the HR diagram, where will you find the least massive stars? and the most massive stars? If I double the mass of a main sequence star, the luminosity increases by a factor 2 3.5 ~ 11.3. ...
Apparent magnitude
... The other side of the central area has an asymmetrical bulge: a bar the longitudinal axis of which is close to the viewing angle ...
... The other side of the central area has an asymmetrical bulge: a bar the longitudinal axis of which is close to the viewing angle ...
doc - University of Texas Astronomy
... travel times,. Now evidence for three planets orbiting this pulsar, with masses like that of the Earth! But almost certainly not primordial (there from the beginning), because planet would be destroyed by the supernova explosion that gave rise to the neutron star. So maybe it is easy to form terrest ...
... travel times,. Now evidence for three planets orbiting this pulsar, with masses like that of the Earth! But almost certainly not primordial (there from the beginning), because planet would be destroyed by the supernova explosion that gave rise to the neutron star. So maybe it is easy to form terrest ...
Lab 4
... Photometry is the determination and use of the color spectrum of astronomical objects to determine the objects’ properties. Two properties you will investigate later are distance and age. The objects you will use are stars in various clusters in the Milky Way galaxy and beyond. This is known as the ...
... Photometry is the determination and use of the color spectrum of astronomical objects to determine the objects’ properties. Two properties you will investigate later are distance and age. The objects you will use are stars in various clusters in the Milky Way galaxy and beyond. This is known as the ...
Test - Scioly.org
... supplies and put the test FACEDOWN. (Make sure, of course, to reorganize any unstapled tests – otherwise, we will have such a headache reorganizing the tests for grading.) I or another proctor will be going around to collect the tests. If I see anyone attempting to answer questions beyond the time l ...
... supplies and put the test FACEDOWN. (Make sure, of course, to reorganize any unstapled tests – otherwise, we will have such a headache reorganizing the tests for grading.) I or another proctor will be going around to collect the tests. If I see anyone attempting to answer questions beyond the time l ...
ANSWER
... smaller than gas giant planets. 7. What is the difference between the distance between the terrestrial and gas giant planets? ANSWER: The distances between the gas giant planets are much larger than the distances between the terrestrial planets. 8. What is the difference between the structure of the ...
... smaller than gas giant planets. 7. What is the difference between the distance between the terrestrial and gas giant planets? ANSWER: The distances between the gas giant planets are much larger than the distances between the terrestrial planets. 8. What is the difference between the structure of the ...
Nearby Stars - How far away is it
... Star Trek fans may recognize Wolf 359 as the scene of a great battle between the Federation and The Borg. Lalande 21185 - 8.32 light years Lalande 21185 is another dime red star. Recent analysis indicates that it may also be accompanied by at least two orbiting planets, but his has not been confirme ...
... Star Trek fans may recognize Wolf 359 as the scene of a great battle between the Federation and The Borg. Lalande 21185 - 8.32 light years Lalande 21185 is another dime red star. Recent analysis indicates that it may also be accompanied by at least two orbiting planets, but his has not been confirme ...
Stellar Evolution
... • Mass of Sun • Radius of Earth • Hot as Sun’s core • A million times denser than lead • Slowly cool off ...
... • Mass of Sun • Radius of Earth • Hot as Sun’s core • A million times denser than lead • Slowly cool off ...
Stars - Academic Computer Center
... • Binary stars provide a means of determining the masses of stars. • Other properties can also sometimes be determined from binary stars. ...
... • Binary stars provide a means of determining the masses of stars. • Other properties can also sometimes be determined from binary stars. ...
January 2007 - Western Nevada Astronomical Society
... two successive meridian transits by the Sun. A sidereal day is 23 hours, 56 minutes, 4 seconds long, the length it takes a star to cross your meridian two times successively. A solar day is about 4 minutes longer than a sidereal day because while the Earth rotates on its axis it also moves along in ...
... two successive meridian transits by the Sun. A sidereal day is 23 hours, 56 minutes, 4 seconds long, the length it takes a star to cross your meridian two times successively. A solar day is about 4 minutes longer than a sidereal day because while the Earth rotates on its axis it also moves along in ...
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.