Astronomy 3020: Cosmology Samples for Exam 3
... 9. An observer on the Earth sees a spaceship moving east at 0.8c and another moving west at 0.9c. If a passenger on the spaceship moving west shines a laser at the spaceship moving east, which of the following is not possible? a) A passenger on the spaceship moving east measures the speed of the las ...
... 9. An observer on the Earth sees a spaceship moving east at 0.8c and another moving west at 0.9c. If a passenger on the spaceship moving west shines a laser at the spaceship moving east, which of the following is not possible? a) A passenger on the spaceship moving east measures the speed of the las ...
Ch.11 Massive star death
... — Use orbital properties of companion — Measure velocity and distance of orbiting gas It’s a black hole if it’s not a star and its mass exceeds the neutron star limit (~3 MSun) ...
... — Use orbital properties of companion — Measure velocity and distance of orbiting gas It’s a black hole if it’s not a star and its mass exceeds the neutron star limit (~3 MSun) ...
Constellations
... The first on the list of Heracles' jobs was the task of killing the Nemean Lion, a giant beast that roamed the hills and the streets of the Peloponnesian villages, devouring whomever it met. The animal's skin was immune to iron, bronze, and stone and Heracles' arrows bounced off the lion. So Heracle ...
... The first on the list of Heracles' jobs was the task of killing the Nemean Lion, a giant beast that roamed the hills and the streets of the Peloponnesian villages, devouring whomever it met. The animal's skin was immune to iron, bronze, and stone and Heracles' arrows bounced off the lion. So Heracle ...
X-Ray Astronomy and Accretion Phenomena
... produce some X-rays in their outer atmosphere. The gas in this regions, known as the Chromosphere, is very hot and tenuous. Flares and prominences on the surface of the Sun also produce X-rays as a result of reconnection of magnetic fields. Although in the history of X-ray astronomy" it was stated t ...
... produce some X-rays in their outer atmosphere. The gas in this regions, known as the Chromosphere, is very hot and tenuous. Flares and prominences on the surface of the Sun also produce X-rays as a result of reconnection of magnetic fields. Although in the history of X-ray astronomy" it was stated t ...
Document
... o Observed rates of period change are consistent with Classic Cepheids during their first crossing of the instability gap, whereas models have the rate of change for Polaris at four times what is observed. ...
... o Observed rates of period change are consistent with Classic Cepheids during their first crossing of the instability gap, whereas models have the rate of change for Polaris at four times what is observed. ...
ASTRONOMY 110G Review Questions for
... Which observation, invention, experiment, or discovery of Galileo proved that the Ptolemaic System had to be incorrect. Prior to this, what was the strongest observational indication favoring the Copernican view? The Ptolemaic view? Where on Earth are all stars visible at one time or another? Where ...
... Which observation, invention, experiment, or discovery of Galileo proved that the Ptolemaic System had to be incorrect. Prior to this, what was the strongest observational indication favoring the Copernican view? The Ptolemaic view? Where on Earth are all stars visible at one time or another? Where ...
Grade Nine Planetarium script
... Ask them what the stars would appear to do as the earth spins on its axis. If you need to, point out that the earth spins counter clock-wise (when viewed from the north) (west to east, that is) Conclude, that like the sun, the stars will rise in the east move across the sky and set in the west (cou ...
... Ask them what the stars would appear to do as the earth spins on its axis. If you need to, point out that the earth spins counter clock-wise (when viewed from the north) (west to east, that is) Conclude, that like the sun, the stars will rise in the east move across the sky and set in the west (cou ...
Astronomy Assignment #1
... Mass is the fundamental property of stars that determines their evolution because mass sets the central pressure, temperature and density that controls the fusion rates and fusion rates determine luminosity, and lifetime. 2. Why do massive stars last for a short time as main sequence stars but low-m ...
... Mass is the fundamental property of stars that determines their evolution because mass sets the central pressure, temperature and density that controls the fusion rates and fusion rates determine luminosity, and lifetime. 2. Why do massive stars last for a short time as main sequence stars but low-m ...
MS PowerPoint - National Schools` Observatory
... Variable Stars To begin with, you need to ensure that you have installed the NSO’s image processing software on your system. LTImage is freely available on the NSO website at the following link: ...
... Variable Stars To begin with, you need to ensure that you have installed the NSO’s image processing software on your system. LTImage is freely available on the NSO website at the following link: ...
Putting a Whopper into Orbit
... In our solar system, the Earth and the eight other planets orbit the Sun. Most of the objects orbiting the Sun move along or close to an imaginary flat surface. This imaginary surface is called the ecliptic plane. Many planets also have moons. These moons orbit around them. Orbits are elliptical in ...
... In our solar system, the Earth and the eight other planets orbit the Sun. Most of the objects orbiting the Sun move along or close to an imaginary flat surface. This imaginary surface is called the ecliptic plane. Many planets also have moons. These moons orbit around them. Orbits are elliptical in ...
Today`s Powerpoint
... elliptical orbits with random orientations. They also cross the disk. Bulge: similar to halo. Disk: rotates. ...
... elliptical orbits with random orientations. They also cross the disk. Bulge: similar to halo. Disk: rotates. ...
Planet Hunters
... telescopes and the latest digital detectors, astronomers are now capable not only of detecting the presence of planets orbiting other stars, but of measuring their physical properties and even in some cases chemical makeups, all from right here on Earth. In fact, since the first distant planets were ...
... telescopes and the latest digital detectors, astronomers are now capable not only of detecting the presence of planets orbiting other stars, but of measuring their physical properties and even in some cases chemical makeups, all from right here on Earth. In fact, since the first distant planets were ...
Astronomy Exam #2 for the 10
... and cool giant stars. The hot main sequence stars appear to be mostly B and A spectral type with an absolute magnitude between +2 and -5. This range in absolute magnitudes corresponds to a range in luminosity of between 16 and 10,000 solar luminosities. These stars will have a short main sequence li ...
... and cool giant stars. The hot main sequence stars appear to be mostly B and A spectral type with an absolute magnitude between +2 and -5. This range in absolute magnitudes corresponds to a range in luminosity of between 16 and 10,000 solar luminosities. These stars will have a short main sequence li ...
Slide 1
... The naked eye, upon optimum conditions, can see down to around the sixth magnitude, that is +6. Under Pogson's system, a few of the brighter stars now have negative magnitudes. For example, Sirius is –1.5. The lower the magnitude number, the brighter the object. The full moon has a magnitude of abou ...
... The naked eye, upon optimum conditions, can see down to around the sixth magnitude, that is +6. Under Pogson's system, a few of the brighter stars now have negative magnitudes. For example, Sirius is –1.5. The lower the magnitude number, the brighter the object. The full moon has a magnitude of abou ...
Chapter 14 The Milky Way Galaxy
... luminosity; knowing their apparent magnitude allows us to calculate the distance. • Cepheids have a luminosity that is strongly correlated with the period of their oscillations; once the period is measured, the luminosity is known and we can proceed as above. ...
... luminosity; knowing their apparent magnitude allows us to calculate the distance. • Cepheids have a luminosity that is strongly correlated with the period of their oscillations; once the period is measured, the luminosity is known and we can proceed as above. ...
ASTR100 Class 01 - University of Maryland Department of
... The Pleiades cluster now has no stars with life expectancy less than around 100 million years. Main-sequence turnoff ...
... The Pleiades cluster now has no stars with life expectancy less than around 100 million years. Main-sequence turnoff ...
PHYSICS 113 Assignment #9 SOLUTIONS Chapter 17 13. Starting
... outpouring of energy from quasars?" How would you respond? Since black holes have mass, they have gravity and thus they attract matter towards them. When this matter moves inside the event horizon (also known as the Schwarzschild radius), it is no longer observable. This is because even light is tra ...
... outpouring of energy from quasars?" How would you respond? Since black holes have mass, they have gravity and thus they attract matter towards them. When this matter moves inside the event horizon (also known as the Schwarzschild radius), it is no longer observable. This is because even light is tra ...
Hipparcos
Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993. It was the first space experiment devoted to precision astrometry, the accurate measurement of the positions of celestial objects on the sky. This permitted the accurate determination of proper motions and parallaxes of stars, allowing a determination of their distance and tangential velocity. When combined with radial-velocity measurements from spectroscopy, this pinpointed all six quantities needed to determine the motion of stars. The resulting Hipparcos Catalogue, a high-precision catalogue of more than 118,200 stars, was published in 1997. The lower-precision Tycho Catalogue of more than a million stars was published at the same time, while the enhanced Tycho-2 Catalogue of 2.5 million stars was published in 2000. Hipparcos ' follow-up mission, Gaia, was launched in 2013.The word ""Hipparcos"" is an acronym for High precision parallax collecting satellite and also a reference to the ancient Greek astronomer Hipparchus of Nicaea, who is noted for applications of trigonometry to astronomy and his discovery of the precession of the equinoxes.