Chapter 3 Cosmology 3.1 The Doppler effect
... Astronomers in 1998 studying type Ia supernovae were astounded when they discovered very distant supernovae much further away than expected. To reach such distances, the supernovae must have been accelerating. The astronomers concluded that the expansion of the Universe is accelerating and has been ...
... Astronomers in 1998 studying type Ia supernovae were astounded when they discovered very distant supernovae much further away than expected. To reach such distances, the supernovae must have been accelerating. The astronomers concluded that the expansion of the Universe is accelerating and has been ...
Measuring Distances - Stockton University
... Due to the spin of the galaxy, an observer will see part of the galaxy approaching them and part of the galaxy running away. This causes the emission from the galaxy to show redshifted, blueshifted, and no-shifted emission. The motion will thus cause a narrow line, e.g., a line due to some element l ...
... Due to the spin of the galaxy, an observer will see part of the galaxy approaching them and part of the galaxy running away. This causes the emission from the galaxy to show redshifted, blueshifted, and no-shifted emission. The motion will thus cause a narrow line, e.g., a line due to some element l ...
First firm spectral classification of an early-B pre-main
... Received 14 September 2011 / Accepted 25 October 2011 ABSTRACT ...
... Received 14 September 2011 / Accepted 25 October 2011 ABSTRACT ...
The Milky Way: Home to Star Clusters
... by feeding model and implies that most, if not all, halo stars evolved at the same or similar time. To complicate matters further, other studies appear to show that the chemical content of lone and cluster stars within the halo are different to those in dwarf galaxies, further disproving the canniba ...
... by feeding model and implies that most, if not all, halo stars evolved at the same or similar time. To complicate matters further, other studies appear to show that the chemical content of lone and cluster stars within the halo are different to those in dwarf galaxies, further disproving the canniba ...
Penentuan Jarak dalam Astronomi II
... Last two SNe in our Milky Way Galaxy: SN 1572 (Tycho Brage’s supernova Ia (?) in the Cassiopeia constellation) achieved -4m at the maximun brightness SN 1604 (Kepler’s supernova Ia in the Ophiuchus constellation) achieved -2.5m As expected, we could have miss a number of Supernovae events that have ...
... Last two SNe in our Milky Way Galaxy: SN 1572 (Tycho Brage’s supernova Ia (?) in the Cassiopeia constellation) achieved -4m at the maximun brightness SN 1604 (Kepler’s supernova Ia in the Ophiuchus constellation) achieved -2.5m As expected, we could have miss a number of Supernovae events that have ...
Surveying the Stars
... •Stars with lower T than main-sequence stars with the same L, or with higher L than main-sequence stars with the same T, must have larger radii ...
... •Stars with lower T than main-sequence stars with the same L, or with higher L than main-sequence stars with the same T, must have larger radii ...
chapter 14 - Astronomy
... 3. Electron degeneracy is the state of a gas in which its electrons are packed as densely as nature permits. The temperature of such a high-density gas is not dependent on the pressure as it is in a “normal” gas. 4. In the case of the degenerate core of a red giant, the more massive the core is, the ...
... 3. Electron degeneracy is the state of a gas in which its electrons are packed as densely as nature permits. The temperature of such a high-density gas is not dependent on the pressure as it is in a “normal” gas. 4. In the case of the degenerate core of a red giant, the more massive the core is, the ...
Visual Double Star Measurements with Equatorial - Alt
... telescope is moved so that the primary star accurately drifts through the central division mark. In practice, the primary is situated about 5-8 division marks away from the central mark and allowed to drift. If the star drifts through the central mark, the drift sequence is allowed to continue until ...
... telescope is moved so that the primary star accurately drifts through the central division mark. In practice, the primary is situated about 5-8 division marks away from the central mark and allowed to drift. If the star drifts through the central mark, the drift sequence is allowed to continue until ...
Observational properties of stars
... It is worth noting that we’re not really safe at just making the assumption that stars are exactly like black bodies, since they are not perfect objects and don’t follow the energy output graphs that you’d get from equation 1-1a or 1-1b exactly. To be honest we have to acknowledge this imperfection ...
... It is worth noting that we’re not really safe at just making the assumption that stars are exactly like black bodies, since they are not perfect objects and don’t follow the energy output graphs that you’d get from equation 1-1a or 1-1b exactly. To be honest we have to acknowledge this imperfection ...
ASTROPHYSICS UNIVERSE - Physics
... occurring in the core. The reduced fusion leads to reduced radiation pressure from the core and leads to gravitational collapse (within the core). The core then starts to fuse Helium, and fusion that is still occurring happens in a shell surrounding the core. This leads to an increase in the luminos ...
... occurring in the core. The reduced fusion leads to reduced radiation pressure from the core and leads to gravitational collapse (within the core). The core then starts to fuse Helium, and fusion that is still occurring happens in a shell surrounding the core. This leads to an increase in the luminos ...
charts_set_9
... and computer simulations show this situation can be maintained for a long time. ...
... and computer simulations show this situation can be maintained for a long time. ...
Table of Contents - Imiloa Astronomy Center
... Legends of the Night Sky: Orion Educator’s Guide - The origin of the phrase ‘the dog days of summer’ comes from this ancient belief. - The star is mostly thought of now as a winter star, accompanying Orion. ...
... Legends of the Night Sky: Orion Educator’s Guide - The origin of the phrase ‘the dog days of summer’ comes from this ancient belief. - The star is mostly thought of now as a winter star, accompanying Orion. ...
LESSON 8: STARS
... Most of the stars in the sky are double stars, which are pairs of stars located in nearly the same position in the sky. The two stars that make up a double star may not actually be close to each other in space, but simply lie in the same line of sight from the Earth. They usually appear as a single ...
... Most of the stars in the sky are double stars, which are pairs of stars located in nearly the same position in the sky. The two stars that make up a double star may not actually be close to each other in space, but simply lie in the same line of sight from the Earth. They usually appear as a single ...
Open access - ORBi
... have a rather large χ2r of about 2.6. We will therefore not consider these two detections as significant, all the more that the most significantly negative excess in our sample (ι Vir) is precisely at the −3σ level. We are therefore left with 12 significant detections of K-band circumstellar excess aro ...
... have a rather large χ2r of about 2.6. We will therefore not consider these two detections as significant, all the more that the most significantly negative excess in our sample (ι Vir) is precisely at the −3σ level. We are therefore left with 12 significant detections of K-band circumstellar excess aro ...
1 Name: Date: PARALLAX EXERCISE1 The goal of this
... difference is that even the nearest stars are quite far away compared to the diameter of the Earth’s orbit around the Sun. Because the stars are so far away, the parallax angle of even the nearest star is extremely small. The nearest star, Proxima Centauri, has a parallax angle of only 0.75" (arcsec ...
... difference is that even the nearest stars are quite far away compared to the diameter of the Earth’s orbit around the Sun. Because the stars are so far away, the parallax angle of even the nearest star is extremely small. The nearest star, Proxima Centauri, has a parallax angle of only 0.75" (arcsec ...
Powerpoint
... - contains young and old stars, gas, dust. Has spiral structure - vertical thickness roughly 100 pc - 2 kpc (depending on component. Most gas and dust in thinner layer, most stars in thicker layer) ...
... - contains young and old stars, gas, dust. Has spiral structure - vertical thickness roughly 100 pc - 2 kpc (depending on component. Most gas and dust in thinner layer, most stars in thicker layer) ...
PHYS_3380_082615_bw - The University of Texas at Dallas
... them to tell what month it is. For example, Scorpius is only visible in the northern hemisphere's evening sky in the summer. - many of the myths associated with the constellations thought to have been invented to help the farmers remember them - made up stories about them ...
... them to tell what month it is. For example, Scorpius is only visible in the northern hemisphere's evening sky in the summer. - many of the myths associated with the constellations thought to have been invented to help the farmers remember them - made up stories about them ...
CHAPTER 14
... 1. In the core of a main sequence star, the following sequence of events occurs: the number of nuclei decrease due to fusion, the core shrinks, gravitational energy heats the core, the fusion rate increases, additional energy is released by the core, the star becomes more luminous, the outer layers ...
... 1. In the core of a main sequence star, the following sequence of events occurs: the number of nuclei decrease due to fusion, the core shrinks, gravitational energy heats the core, the fusion rate increases, additional energy is released by the core, the star becomes more luminous, the outer layers ...
My power point presentation on spectroscopy of stars (ppt file)
... • Sometime fitting works reasonably well, but not perfectly • In this case we can often obtain approximate values of parameters such as chemical abundances, rotation, … • The remaining discrepancies give us information about physics missing from the model • For the supergiant omicron Scorpii, the di ...
... • Sometime fitting works reasonably well, but not perfectly • In this case we can often obtain approximate values of parameters such as chemical abundances, rotation, … • The remaining discrepancies give us information about physics missing from the model • For the supergiant omicron Scorpii, the di ...
Section 4
... called double stars or binary stars. (The prefix bi means “two.”) Those with three stars are called triple stars. The nearby star Proxima Centauri may be part of a triple star system. The other two stars in the system, Alpha Centauri A and Alpha Centauri B, form a double star. Scientists are not sur ...
... called double stars or binary stars. (The prefix bi means “two.”) Those with three stars are called triple stars. The nearby star Proxima Centauri may be part of a triple star system. The other two stars in the system, Alpha Centauri A and Alpha Centauri B, form a double star. Scientists are not sur ...
Andromeda: Daughter of Cassiopeia Ἀνδρομέδη Kaitlyn Heaton
... The Andromeda Galaxy. (Shown in figure 2) is the most distant object visible to the naked eye. You can find this famous galaxy on the right side of Andromeda, about half-way up the constellation. [2] It is a spiral galaxy approximately 2.5 million light years distant. In the past, it was also referr ...
... The Andromeda Galaxy. (Shown in figure 2) is the most distant object visible to the naked eye. You can find this famous galaxy on the right side of Andromeda, about half-way up the constellation. [2] It is a spiral galaxy approximately 2.5 million light years distant. In the past, it was also referr ...
Corona Australis
Corona Australis /kɵˈroʊnə ɒˈstreɪlɨs/ or Corona Austrina /kɵˈroʊnə ɒˈstraɪnə/ is a constellation in the Southern Celestial Hemisphere. Its Latin name means ""southern crown"", and it is the southern counterpart of Corona Borealis, the northern crown. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations. The Ancient Greeks saw Corona Australis as a wreath rather than a crown and associated it with Sagittarius or Centaurus. Other cultures have likened the pattern to a turtle, ostrich nest, a tent, or even a hut belonging to a rock hyrax.Although fainter than its namesake, the oval- or horseshoe-shaped pattern of its brighter stars renders it distinctive. Alpha and Beta Coronae Australis are the two brightest stars with an apparent magnitude of around 4.1. Epsilon Coronae Australis is the brightest example of a W Ursae Majoris variable in the southern sky. Lying alongside the Milky Way, Corona Australis contains one of the closest star-forming regions to our Solar System—a dusty dark nebula known as the Corona Australis Molecular Cloud, lying about 430 light years away. Within it are stars at the earliest stages of their lifespan. The variable stars R and TY Coronae Australis light up parts of the nebula, which varies in brightness accordingly.