Discovery of White Dwarfs—1 Oct • Adams’ discovery
... • We are Walter Adams of the Mt. Wilson Observatory in 1914. We are studying the double star Sirius A and B. (Sirius A & B orbit each other.) • Sirius B is much fainter than Sirius A. ...
... • We are Walter Adams of the Mt. Wilson Observatory in 1914. We are studying the double star Sirius A and B. (Sirius A & B orbit each other.) • Sirius B is much fainter than Sirius A. ...
Jan 2015 - Bluewater Astronomical Society
... event is in daylight. (Diagram right). Bummer. But, both the Moon and Venus should be visible even in the daylight. Here are times for the Venus occultation by the Crescent Moon: (Diagram from Starry Night centre right) Dec 7: Disappearance on bright limb: 12:28 pm EST, for 65 min and Reappearance a ...
... event is in daylight. (Diagram right). Bummer. But, both the Moon and Venus should be visible even in the daylight. Here are times for the Venus occultation by the Crescent Moon: (Diagram from Starry Night centre right) Dec 7: Disappearance on bright limb: 12:28 pm EST, for 65 min and Reappearance a ...
it now and get started on your discovery
... The other planets in our neighborhood, or solar system, include Mercury, Venus, Mars, Jupiter, Saturn, Uranus, and Neptune. Compared to everything out in the universe we, humans, are very, very small. Earth is not even the biggest planet. (The biggest planet in our solar system is Jupiter!) If you w ...
... The other planets in our neighborhood, or solar system, include Mercury, Venus, Mars, Jupiter, Saturn, Uranus, and Neptune. Compared to everything out in the universe we, humans, are very, very small. Earth is not even the biggest planet. (The biggest planet in our solar system is Jupiter!) If you w ...
Chapters 12 and 13 Review: The Life Cycle and Death of Stars
... rate, such as once per second. A reasonable explanation for this dimming and brightening is that the object is: • generating energy in its core by nuclear fusion, and rapid changes in the core temperature cause rapid changes in the fusion rate • rapidly rotating so that we see a bright spot with ...
... rate, such as once per second. A reasonable explanation for this dimming and brightening is that the object is: • generating energy in its core by nuclear fusion, and rapid changes in the core temperature cause rapid changes in the fusion rate • rapidly rotating so that we see a bright spot with ...
Doppler Effect Demo
... Are all galaxies red-shifted? No. The overall expansion of the universe shows up only at great distances. Some galaxies that are close to the Milky Way actually move toward us and are blue-shifted. However, all galaxies beyond a certain distance are red-shifted. Is it possible to see any planets orb ...
... Are all galaxies red-shifted? No. The overall expansion of the universe shows up only at great distances. Some galaxies that are close to the Milky Way actually move toward us and are blue-shifted. However, all galaxies beyond a certain distance are red-shifted. Is it possible to see any planets orb ...
HST Key Project to Measure the Hubble Constant from
... in size (get brighter as they grow larger, dim as they shrink) Can’t achieve balance of power welling up from core and power radiating from surface ...
... in size (get brighter as they grow larger, dim as they shrink) Can’t achieve balance of power welling up from core and power radiating from surface ...
HIGH RESOLTION SPH SIMULATIONS OF GALAXY CLUSTERS
... Excess of small scale structure in CDM models: making small halos invisible?. Hubble sequence (formation of disks) Interactions galaxy -ICM ...
... Excess of small scale structure in CDM models: making small halos invisible?. Hubble sequence (formation of disks) Interactions galaxy -ICM ...
Dynamical models of the nucleus of M31
... • this doesn’t apply because stars at small radii are eaten by the black hole • correct solution including absorbing boundary condition is (Bahcall & Wolf 1976) ...
... • this doesn’t apply because stars at small radii are eaten by the black hole • correct solution including absorbing boundary condition is (Bahcall & Wolf 1976) ...
The Helium Flash - Stages 10 to 11
... As the helium depletes, the star will basically reproduce it’s the path that took it to stage 9. The helium will burn out at the center of the core, and helium burning as well as hydrogen burning will continue is the outer shells. The star will expand to a red giant once again, this time with shells ...
... As the helium depletes, the star will basically reproduce it’s the path that took it to stage 9. The helium will burn out at the center of the core, and helium burning as well as hydrogen burning will continue is the outer shells. The star will expand to a red giant once again, this time with shells ...
ST05 plotting the moon
... NCP through the year (they also rotate around the NCP through the night). (Of course, this apparent motion is caused by the Earth’s rotation – the stars don’t really move!) Note that the Big Dipper (Ursa Major) and Cassiopeia are on opposite sides of the North Celestial Pole. So they have different ...
... NCP through the year (they also rotate around the NCP through the night). (Of course, this apparent motion is caused by the Earth’s rotation – the stars don’t really move!) Note that the Big Dipper (Ursa Major) and Cassiopeia are on opposite sides of the North Celestial Pole. So they have different ...
Local group
... • at time t, mass DMtotal of stars formed, after the massive stars die left with DMlow mass which live 'forever', • massive stars inject into ISM a mass pDMtotal of heavy elements (p depends on the IMF and the yield of SN- normalized to total mass of stars). • Assumptions: galaxies gas is well mixed ...
... • at time t, mass DMtotal of stars formed, after the massive stars die left with DMlow mass which live 'forever', • massive stars inject into ISM a mass pDMtotal of heavy elements (p depends on the IMF and the yield of SN- normalized to total mass of stars). • Assumptions: galaxies gas is well mixed ...
a transiting planet of a sun-like star
... ficient to discern a steep ingress and egress flanking a relatively wide flat bottom (Fig. 3). With angular resolution 20 times finer than those of the survey cameras, the E.T. observations reduced the likelihood that XO-1 was a dilute triple system; that is, one star with a fainter, eclipsing bina ...
... ficient to discern a steep ingress and egress flanking a relatively wide flat bottom (Fig. 3). With angular resolution 20 times finer than those of the survey cameras, the E.T. observations reduced the likelihood that XO-1 was a dilute triple system; that is, one star with a fainter, eclipsing bina ...
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.